Solution
Solution
6001CMD30300125001 MD
PHYSICS
1)
(1)
(2)
(3)
(4)
(1) 2
(2)
(3) 1
(4) 0
3) Calculate the distance between two points (0, –1, 1) and (3, 3, 13) : –
(1) 5
(2) 12
(3) 13
(4) 17
(1)
(2)
(3)
(4)
(1)
      2t – et +
(2)
(3) t + et + log t
(4) None
(1) e2
(2) e2 – 1
(3) e2 + 1
(4) 0
8) Find for :
(1)
(2)
(3)
(4)
(1) –4
(2) 4
(3) –2
(4) 0
10)
Evaluate =
(3)
      –   sin (5x) + c
(4)
          sin (5x) + c
11) Value of
(1) 2x + c
(2) 2logex + c
(3) x2 + c
(4)
12) is equal to :-
(1)
(2)
(3)
(4)
13) :-
(1)
(2)
(3)
(4) None
14) The value of
(1) 2
(2) 1
(3)
(4)
(1)
(2)
(3) 0
(4)
16)
(1) 464
(2) 540
(3) 544
(4) 646
(2)
(3)
(4)
19) (0.98)1/2=
(1) 0.98
(2) 1.01
(3) 0.97
(4) 0.99
(1)
(2)
(3)
(4)
21)
(1) Kelvin
(2) Second
(3) Candela
(4) Kilogram weight
22) "Light year" is the practical unit for which of the following quantities ?
(1) Time
(2) Length
(3) Energy
(4) Power
24) If u1 & u2 are the units selected in two systems of units and n1 and n2 are their numerical values,
then :
(2)
25)
(1) 1
(2)
(3)
(4) 3
27) Temperature can be expressed as a derived quantity in terms of which of the following?
(1) Increases
(2) Decreases
(3) Remains constant
(4) First decreases then increases.
(1) Microsecond
(2) Leap year
(3) Lunar month
(4) Light year
(1) erg
(2) calorie
(3) joule
(4) electron volt
32) The velocity v (in cm/sec) of a particle is given in terms of time t (in sec) by the equation:
a b c
33) The velocity of a freely falling body changes as gphq where g is acceleration due to gravity and h
is the height. The values of p and q are–
(1)
(2)
(3)
(4) 1, 1
34) If         and                     are maximum absolute errors in Z, A and B respectively, then
the maximum relative error in X is given by:-
(1)
(2)
(3)
(4)
36) If dimensions of P and Q are different, then which of the following operation is valid?
(1)
(2)
(3) P-Q
(4) P+Q
37) If 97.52 is divided by 2.54, the correct result in terms of significant figures is :-
(1) 38.4
(2) 38.3937
(3) 38.394
(4) 38.39
(1) 12435 kg
(2) 1.02300 kg
(3) 0.02345 meter
(4) 0.23450 meter
(1) 6.431 cm
(2) 6.43 cm
(3) 6.4 cm
(4) 6 cm
40) Order of magnitude in 6.67 × 10–11Nm2/Kg2
(1) –11
(2) –10
(3) –12
(4) +10
41) On measuring the period of oscillation of a simple pendulum. In successive measurements, the
readings turn out to be 2.63 s, 2.56 s, 2.42 s, 2.71s and 2.80 s. Then more correct way of writting
time period will be:-
42)
A student measure quantities a,b and c and then calculates S by the formula S = ab2/c3.
If the errors in a,b,c are 1%, 3% and 2% respectively, the maximum error in S can be:-
(1) 13%
(2) 7%
(3) 4%
(4) 1%
43) If percentage increase in radius of solid sphere is 3%, then find percentage increase in its
volume
(1) 3%
(2) 6%
(3) 9%
(4) 12%
(1)
(2)
(3)
(4)
45) The number of circular division on the shown screw gauge is 100. It moves 1 mm on main scale
for one complete rotation and main scale has 1 mm marks. The diameter of the ball is :-
(1) 2.25 mm
(2) 2.20 mm
(3) 1.20 mm
(4) 1.25 mm
CHEMISTRY
1) How much oxygen is required for complete combustion of 560 g of ethene (C2H4) :-
(1) 1.92 g
(2) 1920 g
(3) 19.2 g
(4) 9.6 kg
(1) 16 g 'O'
(2) 16 g 'O2'
(3) 16 g 'O3'
(4) All will have same number of atoms
(1) 22 NA
(2) 3 NA
(3) 30 NA
(4) None of these
5) Equal mass of O2, H2 and CH4 are taken in a container in identical conditions. What is the ratio of
their moles :-
(1) 1 : 16 : 1
(2) 1 : 16 : 2
(3) 8 : 1 : 8
(4) 16 : 1 : 8
6) 50g sample of CaCO3 on dissociation produces 2.24 L CO2 at STP, find percentage purity of CaCO3
in sample :-
(1) 50%
(2) 20%
(3) 10%
(4) 100%
(1) 0.1 M
(2) 0.2 M
(3) 0.5 M
(4) 1 M
8) Two flasks A and B of equal volume contain SO2 and CH4 gas respectively under similar
conditions, find ratio of atoms present in A and B flask :-
(1) 1 : 1
(2) 2 : 4
(3) 3 : 5
(4) 2 : 1
(1) 6 g O2
(2) 8 g O2
(3) 9 g O2
(4) 4 g O2
(1) 46.6
(2) 85
(3) 18
(4) 28
(1)
(2)
(3) NA
(4)
13) Which of the following pairs of compounds illustrates the law of multiple proportions?
14) How many moles of Mg3(PO4)2 will contain 0.25 mole of oxygen atoms ?
(1) 0.02
(2) 3.125×10–2
(3) 1.25×10–2
(4) 2.5×10–2
15) Which of the following pairs have the same number of atoms?
(1) 16 g of O2 and 4g of H2
(2) 46 g of O2 and 44g of CO2
(3) 28 g of N2 and 32 g of O2
(4) 12 g of C and 46 g of Na
16)
The density of 2 M aqueous solution of NaOH is 1.28 g/cm3. The molality of the solution is [Given
that molecular mass of NaOH = 40 g mol-1]
(1) 1.32 m
(2) 1.20 m
(3) 1.56 m
(4) 1.67 m
(1) molality
(2) Mole fraction
(3) Molarity
(4) Weight fraction of solvent
(1) 16 g
(2) 26.72 × 10–24 g
(3) Both (1) and (2) are correct
(4) 26.72 × 10–24 kg
       Column-I                    Column-II
(A) 0.5 mole SO2 gas       (P)   10 moles of proton
21) Assertion : CO2 has more number of molecule in its 88 g than number of molecule of H2O in its
72 g.
Reason : Both have 4 mole of molecules.
22) Assertion : The empirical mass of ethene is half of its molecular mass.
Reason : The empirical formula represents the simplest whole number ratio of various atoms
present in a compound.
(1) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(2) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
(3) Assertion is true but Reason is false.
(4) Both Assertion and Reason are false.
23) Assertion : Equal moles of C-12 and C-13 will have equal number of atoms.
Reason : Equal moles of C-12 and C-13 will have equal mass.
(1) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(2) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
(3) Assertion is true but Reason is false.
(4) Both Assertion and Reason are false.
Column-I Column-II
(1)
(2)
(3) 3NA
(4) NA
28) The vapour densities of two gases are in the ratio of 1 : 3. Their molecular masses are in the
ratio of :-
(1) 1 : 3
(2) 1 : 2
(3) 2 : 3
(4) 3 : 1
29) A hydrocarbon contain 80% C. The vapour density of compound is 30. Empirical formula of
compound
(1) CH3
(2) C2H6
(3) C4H12
(4) C4H8
(1) 1000 kg
(2) 56 kg
(3) 44 kg
(4) 100 kg
(1) C6H12O6
(2) C3H6O3
(3) C2H4O2
(4) CH2O
32)
(1) 1.7700
(2) 0.1770
(3) 0.0177
(4) 0.0344
34)
(1) 22 g of CO2
(2) 44 g of CO2
(3) 66 g of CO2
(4) 88 g of CO2
(1) 5 mole of C
(2) 4 mole of C
(3) 8 mole of C
(4) 13 mole of C
36) The number of moles of hydrogen molecules required to produce 20 moles of ammonia through
Haber's process is :-
(1) 10
(2) 20
(3) 30
(4) 40
37) In one molal solution that contains 0.5 mole of a solute, there is
List-I List-II
40)
Elements A and B form two compounds B2A3 and B2A. 0.05 moles of B2A3 weight 9.0 g and 0.10 mole
of B2A weight 10 g. Calculate the atomic weight of A and B:-
(1) 20 and 30
(2) 30 and 40
(3) 40 and 30
(4) 30 and 20
41) For preparing 0.1 M solution of H2SO4 in one litre, we need H2SO4 :
(1) 0.98 g
(2) 4.9 g
(3) 49.0 g
(4) 9.8 g
(1)
(2)
(3)
(4)
43) If 3.01     1020 molecules are removed from 98 mg of H2SO4, then the number of moles of H2SO4
left are :-
44) Calculate the number of atoms of chlorine in 2.08 gm of BaCl2. (Atomic weight of Ba = 137, Cl =
35.5)
(1) 2     10-1 NA
(2) 2 NA
(3) 2     10-2 NA
(4) 2     10-3 NA
45) An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gives C,
38.71% and H, 9.67%. The empirical formula of the compound would be:-
(1) CHO
(2) CH4O
(3) CH3O
(4) CH2O
BIOLOGY
(1) Ribosomes
(2) Golgi apparatus
(3) Lysosomes
(4) Plastids
(1) Thylakoid
(2) Endoplasmic reticulum
(3) Plasmalemma
(4) Cytoskeleton
(1) Chitin
(2) Peptidoglycan
(3) Cellulose and pectin
(4) Starch
5)
Regarding differences between animal & plant cells, which of the following statement is correct?
(1) Animal cells contain centrioles & cell wall, plant cells do not
(2) Animal cells contain centrioles & plant cells contain plastids, cell wall and large central vacuole
(3) Animal cells do not contain centrioles plant cells contain
(4) Animal cells contain plastids, while plants cells do not contain
(1) Fungi
(2) Animals
(3) Plants
(4) Bacteria
(1) Chloroplast
(2) Chromoplast
(3) Leucoplast
(4) Both (1) & (2)
8) Go through the following statements and then select correct option for prokaryotic cells :-
(I) They are generally smaller than eukaryotic cells.
(II) They multiply more rapidly than the eukaryotic cells.
(III) They are represented by bacteria, BGA, mycoplasma and PPLO (Pleuro Pneumonia like
organism).
(1) Satellite
(2) Centromere
(3) Chromatid
(4) NOR
(1) Polysomes
(2) Flagella
(3) Gas vacuole
(4) Cilia
12) Which one of the following is not a component of endomembrane system : (i) Endoplasmic
reticulum
(ii) Golgi body
(iii) Lysosome
(iv) Vacuole
(v) Nucleus
(1) 100
(2) 1
(3) 20
(4) 40
16) Match the column-I with column-II and choose correct option :-
   Column-I                 Column-II
A Golgi body   i Protein synthesis
B Mitochondria ii Ribosomal RNA synthesis
C Ribosome     iii ATP production
                   Glycolipid and glycoprotein
D Nucleolus    iv
                   formation
(1) A-iii, B-iv, C-ii, D-i
(2) A-iv, B-iii, C-i, D-ii
(3) A-iii, B-iv, C-i, D-ii
(4) A-iv, B-i, C-iii, D-ii
(1) IV and V
(2) II, IV and V
(3) I, II, III
(4) III and V
18) In which of the following chromosome the centromere is located slightly towards one arm?
(1) Metacentric
(2) Telocentric
(3) Sub metacentric
(4) Acrocentric
19) Match the column A with column B and select the correct option from given below.
Column–A Column–B
Scientist Discovery
                                   Fluid mosaic
 (B)   Singer & Nicolson
                                   model
(1) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
(2) Assertion is true but Reason is false.
(3) Assertion is false but Reason is true.
(4) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(1) Both assertion and reason are true and reason is the correct explanation of assertion.
(2) Both assertion and reason are true and reason is not the correct explanation of assertion.
(3) Assertion is true but reason is false.
(4) Both assertion and reason are false.
(1) Phospholipids
(2) Proteins
(3) Carbohydrates
(4) All of the above
(1) Cristae
(2) Grana
(3) Tonoplast
(4) Nuclear membrane
30) Name the scientist who first saw and described a living cell :-
A B C D E
                                                 Inter
        Central       Radial          Central                 Peripheral
 (1)                                             doublet
        microtubles   spoke           sheath                  microtubules
                                                 bridge
33) How many of the following cell organelle are bounded by single membrane
34)
Important site for formation of glycoproteins and glycolipids is
(1) Lysosome
(2) Vacuole
(3) Golgi apparatus
(4) Plastid
Column-I Column-II
                                     Protein folding
 b.      Golgi apparatus       ii.
                                     and secretion
                                     Proteases and
 d.      RER                   iv.
                                     nucleases
(1) a-i, b-ii, c-iii, d-iv
(2) a-iv, b-iii, c-ii, d-i
(3) a-iii, b-i, c-iv, d-ii
(4) a-i, b-iii, c-iv, d-ii
36) Refer the given statements, statements, stating them true (T) of false (F) and select the correct
option.
A. The vacuole stores food
B. Gas vacuoles are found in blue green and purple and green photosynthetic bacteria
C. Centrioles are present in all plant cells.
D. In prokaryotes, ribosomes are made of two subunits 50 S and 40 S.
(1) Kinetochore
(2) Satellite
(3) N.O.R.
(4) Centriole
38) Which of the following is present in eukaryotic and prokaryotic cell both ?
(A) ds DNA      (B) Plasma membrane
(C) Flagella    (D) Pili
(1) Amyloplast
(2) Elaioplast
(3) Aleuroplast
(4) Chromoplast
(1) Metacentric
(2) Sub-metacentric
(3) Acrocentric
(4) Telocentric
41) Which of the given are formed by the process of packaging in the Golgi apparatus?
(1) Lysosome
(2) Mitochondria
(3) Centrioles
(4) Chloroplast
42) In human beings, the membrane of the erythrocyte has approximately __A__ percent proteins
and __B__ percent lipids.
(1) A - 60, B - 40
(2) A - 52, B - 40
(3) A - 40, B - 52
(4) A - 40, B - 60
43) According to the size of the organism, which sequence is not correct :
(1) Eukaryotic cell > Prokaryotic cell > PPLO > Virus
(2) Virus < PPLO < Prokaryotic cell < Eukaryotic cell
(3) Eukaryotic cell > PPLO > Prokaryotic cell > Virus
(4) PPLO < Prokaryotic cell < Eukaryotic cell < Tissue
44) Assertion : Peripheral proteins are partially or totally buried in the membrane.
Reason : Integral proteins lie on the surface of membrane.
(1) If both assertion and reason are true and reason is the correct explanation of assertion.
(2) It both assertion and reason are true but reason is not the correct explanation of assertion.
(3) If assertion is true but reason is false.
(4) If both assertion and reason are false.
46) Match the following columns and choose the correct answer from the following given options :
Column - I Column - II
             Simple
 A           squamous              i         Alveoli
             epithelium
             Simple cuboidal
 B                                 ii        Ducts of glands
             epithelium
             Simple cuboidal
 C           brush border          iii PCT of nephron
             epithelium
             Simple columnar
 D           ciliated              iv Fallopian tubes
             epithelium
A B C D
1 i ii iii iv
2 i ii iv iii
3 i iv ii iii
  4      i        iii        iv         ii
(1) 1
(2) 2
(3) 3
(4) 4
47)                               Identify A, B and C above figures of simple epithelium tissue
A B C
(1) 1
(2) 2
(3) 3
(4) 4
48) Identify the tissue shown in the diagram and match with its characteristics and its location
(1) Skeletal muscle, shows striations and closely attached with the bones of the limbs
(2) Smooth muscles, show branching, found in the walls of the heart
(3) Cardiac muscles, unbranched muscles, found in the walls of the heart
(4) Striated muscles, tapering at both ends, attached with the bones of the limbs
49) Assertion : Gap junctions facilitate the cells to communicate with each other
Reason : Gap junctions connect the cytoplasm of adjoining cells.
(1) Both assertion and reason are true and the reason is the correct explanation of the assertion
(2) Both assertion and reason are true but the reason is not the correct explanation of the assertion
(3) Assertion is true statement but reason is false
(4) Both assertion and reason are false statements
50) All the listed glands pour their secretions into ducts except
(1) Both assertion and reason are true, reason is the correct explanation of assertion
(2) Both assertion and reason are true, reason is not the correct explanation of assertion
(3) Assertion is true, reason is false
(4) Both assertion and reason are false
(1) Mucus
(2) Milk
(3) Ear wax
(4) Hormones
55) ______ epithelium is made of a single thin layer of flattened cells with irregular boundaries.
(1) Columnar
(2) Cuboidal
(3) Squamous
(4) Ciliated
56) Identify the heterocrine glands among the following set of glands
(1) Thyroid, Ovary, Pancreas
(2) Testis, Pancreas, Ovary
(3) Pancreas, Ovary, Adrenal
(4) Ovary, Thymus, Testis
57) The muscles that are attached to bones and help in body movement are:
58) The most widely distributed tissue in the body of complex animals is
(a)
(b)
(1) Both the diagrams represent dense connective tissue with collagen fibres in it
(2) a - Dense connective tissue, b-Areolar tissue
(3) a-Areolar tissue, b - Muscle tissue
(4) a-Dense regular tissue, b - Dense irregular tissue
61) Read the following statements and choose the correct option.
(i) They have a hard and non-pliable ground substance rich in calcium salts and collagen fibres.
(ii) They support and protect softer tissues and organs.
(iii) It's cells are present in the spaces called lacunae.
(iv) They interact with skeletal muscles attached to them to bring about movements.
Which of the following type of tissue is being described by the above statements ?
(1) Cartilage
(2) Bone
(3) Blood
(4) Neurons
(1) Cardiac muscle tissue is a non-contractile tissue present only in the heart
      Communication junctions (intercalated discs) at some fusion points do not allow these cells to
(2)
      contract as a unit
(3) They show the absence of alternate light and dark bands
(4) Cell junctions fuse the plasma membranes of cardiac muscle cells.
63) Which of the following tissue exerts the greatest control over the body's responsiveness to
changing conditions?
69) Which of the following statement is true about compound epithelial tissue?
(1) Reticular
(2) Elastic
(3) Collagen
(4) All of these
73) Epithelial cells involved in the process of absorption of digested food have on their surface
(1) Cilia
(2) Microvilli
(3) Both (1) and (2)
(4) Flagella
74) Which of the following statement is incorrect regarding the diagram given below?
(1) Ectoderm
(2) Endoderm
(3) Mesoderm
(4) All of the above
77) If the cuboidal epithelium turns out to have microvilli on it, what will it be called?
79) If nasal septum gets damaged its recovery requires cartilage called
80) Identify the given below tissue with its type and select the right option for the two together
Options:
Tissue Type
(1) Four
(2) Three
(3) Two
(4) One
82) Identify the glands (A) and (B) shown below and select the right option for location and function
                                                                 Secrete
 (1)       A     Unicellular Gland        Alveoli
                                                                 Saliva
                                                                 Secrete
 (2)       B     Unicellular gland        Oesophagus
                                                                 enzyme
                                                                 Secrete
 (3)       A     Multicellular gland      Alimentary canal
                                                                 Mucous
                                                                 Secrete
 (4)       B     Multicellular gland      Buccal Cavity
                                                                 Saliva
(1) 1
(2) 2
(3) 3
(4) 4
83) How many of the following substances are secreted by exocrine glands?
84) The type of epithelial cells which line the inner surface of fallopian tubes and bronchioles are
known as
86) In the complex body of multicellular animals -digestion, respiration and reproduction are carried
out by
87) The cells of the following tissue are specialized to store fat
(1) Erythrocytes
(2) Platelets
(3) Leucocytes
(4) Thrombocytes
(1) Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
(2) Both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
(3) Assertion is True but the Reason is False.
(4) Both Assertion & Reason are False.
PHYSICS
 Q.         1          2         3        4     5     6     7        8          9     10        11     12     13     14     15    16   17    18    19    20
 A.         1          3         3        1     1     4     4        2          1     4          3      3     3      1      1     2     3     2     4     3
 Q.         21         22        23       24    25    26    27       28        29     30        31     32     33     34     35    36   37    38    39    40
 A.         4          2         3        2     3     3     4        2         2      4         3      3      2      4      3     1    1     3     3     2
 Q.         41         42        43       44    45
 A.         1          1         3        4     2
CHEMISTRY
 Q.         46         47        48       49    50    51    52        53        54        55     56     57     58     59    60    61    62    63   64    65
 A.         2          4         2        1     2     2     2         3         2         4      1      3      4      2     3     4     4     3    2     4
 Q.         66         67        68       69    70    71    72        73        74        75     76     77     78     79    80    81    82    83   84    85
 A.         4          1         3        3     1     4     2         1         1         4      4      3      4      2     2     3     1     4    1     3
 Q.         86         87        88       89    90
 A.         4          2         2        3     3
BIOLOGY
Q.    91         92         93       94    95   96    97        98        99        100        101    102    103    104    105   106   107   108   109   110
A.    1          3          4        3     2    4     3         1         2          2          1      4      2      3      1     2     3     3     1     4
Q.    111        112       113    114     115   116   117    118          119       120        121    122    123    124    125   126   127   128   129   130
A.     3          3         1      2       1     4     3      4            3         3          3      4      4      3      3     1     1     4     3     1
Q.    131        132       133    134     135   136   137    138          139       140        141    142    143    144    145   146   147   148   149   150
A.     1          2         3      4       1     1     2      1            1         3          3      1      4      2      3     2     2     4     1     3
Q.    151        152       153    154     155   156   157    158          159       160        161    162    163    164    165   166   167   168   169   170
A.     2          4         1      1       1     3     2      4            1         2          4      3      2      4      4     1     4     1     3     4
Q.    171        172       173    174     175   176   177    178          179       180
A.     2          4         3      3       1     1     4      3            4         4
                                           SOLUTIONS
PHYSICS
1)
     Concept:
     Quadrants and Signs: The sine function is positive in the first and second quadrants and
     negative in the third and fourth quadrants.
     Mathematical Calculation:
     1. Locate 300°: An angle of 300° lies in the fourth quadrant.
     2. Find the reference angle: The reference angle for 300° is 360° - 300° = 60°.
     3. Determine the sign: Since 300° is in the fourth quadrant, where the sine function is
     negative, sin(300°) will be negative.
     4. Evaluate: We know that sin(60°) = √3/2. Therefore, sin(300°) = sin(360-60°) = -sin(60°)= -
     √3/2
3)
4)
3x – 2y + 4 = 0 ⇒ 2y = 3x + 4
y= ⇒ y=
slope = +m = & c = +2
5)
7)
y = ee = constant
     9) y = x2 + 4x
       = 2x + 4
     =0
  ⇒ 2x + 4 = 0
  ⇒ 2x = –4
    x = –2
  ∴ x = –2 is a point of minima
  y(x = –2) = (–2)2 + 4× (–2) = 4 – 8 = –4
2. Concept used :
Integration of cosine function :
where α is a constant.
3. Formula Used :
4. Calculation :
Comparing with the standard from :
Here α = 5, b = –3
Applying the formula:
Final Answer :
Option (4) :
12)
13)
15) m =
16)                         Draw tangent and see change
17)
Sn = 544
18)
Ans.
22)
25)
SI system-Kelvin
33)
V ∝ [g]p [h]q
[LT–1] = [LT–2]p [L]q
1 = p + q ........ eq.(1)
–1 = 2p .........eq.(2)
36)
(2) Powers are dimensionless, (3) (4) only same dimensions can add or subtract.
37)
Explain : add two measurements, L and B, and express the result with the correct number of
significant figures.
Concept : Significant figures are the digits in a number that are considered reliable and
contribute to the number's precision.
Addition with Significant Figures: When adding or subtracting measurements, the result
should be rounded to the same number of decimal places as the measurement with the least
decimal places.
Formula : L + B = Sum
Calculation : L + B = 3.331 cm + 3.1 cm = 6.431 cm
L has three decimal places.B has one decimal place.
The result should have the same number of decimal places as the measurement with the least
decimal places, which is one.
Round 6.431 cm to one decimal place, which gives 6.4 cm.
Ans (3)      6.4 cm
Difficulty level : easy
41)
T =
  =        = 2.624 = 2.62
  Error in measurements are
  2.63 – 2.62 = 0.01 s
  2.56 – 2.62 = –0.06 s
  2.42 – 2.62 = –0.20 s
  2.71 – 2.62 = 0.09 s
  2.80 – 2.62 = 0.18 s
  Mean absolute error
ΔT mean                                         =s
  T = 2.62 ± 0.11 s
Formula : ν =
Calculation :
% change in volume = 3 × 3%
% change in volume = 9%
CHEMISTRY
      46)              →
      1 mole (28 gr) requires 96 gr of oxygen
47)
Calculation :-
Level :- Easy
51)
1. Question Explanation:
 A. Determine the percentage purity of a 50g CaCO3 sample that produces 2.24 L of CO2 at STP
    upon dissociation.
2. Given Data:
3. Concept:
5. Final Answer:
52)
55) Module
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No. of atoms =
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BIOLOGY
91) NCERT : 127/129
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NCERT XI Pg. # 88
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NCERT – 96
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Allen module 66
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Allen Module 76
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Allen Module 81
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Allen module 66
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Allen module 73
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Allen module 77
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Allen module 77
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Allen module 72
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Allen module 71
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Allen module 67
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Allen module 71
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Allen module 81
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NCERT page no.102
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