GOVERNMENT BOYS’

HIGHER SECONDARY SCHOOL ARAZI

DIST: JAMSHORO TALUKA SEHWAN SHARIF
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CLASS =XII TERMINAL EXAMINATION
Tick (√) on the correct option for each question. Each Question Carries 02 Marks
(01) The basis of Modern periodic table is_____
(a) Atomic number (b) Atomic weight (c) Denisty (d) None of these
(02) The vertical columns in the Periodic table are called __________
(a) Groups (b) Periods (c) Long periods (d) None of these
(03) The regular variation in the properties of elements in a group of periodic table is called _______
(a) Sub Group (b) Block (c) Group trend (d) None of these
(04) Which elements has the largest atomic radius in the period 3___________
(a) Sodium (b) Magnesium (c) Aluminum (d) Argon
(05) Which of the following blocks has the largest atomic radii________
(a) s-block (b) p-block (c) d-block (d) d-block
(06) Which elements has the highest first ionization energy _______
(a) Carbon (b) Oxygen (c) Nitrogen (d) Fluorine
(07) What is the ionization energy of Lithium (Li) ______________
(a) 490 kj/mol (b) 420 kj/mol (c) 400 kj/mol (d) None of these
(08) Which element has the lowest electronegativity in the period 2 ______________
(a) Lithium (b) Beryllium (c) Boron (d) Carbon
(09) Which Groups has the highest electrical conductivity_______
(a) I A & II A (b) ) III A & IV A (c) VA & VI A (d) ) None of t`hese
(10) What is the Common oxidation state of Alkaline earth metals________
(a) + 1 (b) ) +2 (c) -1 (d) ) None of these
(11) Which element exhibits an oxidation state of -2 ________
(a) Lithium (b) Beryllium (c) Boron (d) Oxygen
(12) What is the Common oxidation state of noble gases_______
(a) 0 (b) +1 (c) +2 (d) -1
(13) What is the melting point of Potassium ______
(a) 28.6 oC (b) 63.7 oC (c) 97.8 oC (d) None of these
(14) Which of the following is a unique property of Beryllium _______
(a) Form covalent Bond (b) Highly Ionic (c) Highly reactive (d) All of these
(15) Which representative element reacts vigorously with chlorine____
(a) Sodium (b) Magnesium (c) Aluminum (d) None of these
(16) Which Alkali metal produce a lilac or violet flame____
(a) Lithium (b) Sodium (c) Potassium (d) None of these
(17) What colour flame does sodium produce________
(a) Orange (b) Yellow (c) Red (d) Purple
(18) What is the chemical formula of caustic soda______
(a) NaOH (b) CaCO3 (c) CaOCl2 (d) All of these
(19) Which of the following is a byproduct of the Castner-Kellner Process______
(a) Oxygen Gas (b) Chlorine Gas (c) Neon Gas (d) Helium Gas
(20) Which of the following is a byproduct of the Contact Process (Sulphuric Acid)_______
(a) Sulphur dioxide (b) Sulphur troxide (c) Oleum (d) All of these
(21) Element that is backbone of organic molecules is________
(a) Carbon (b) Hydrogen (c) Oxygen (d) All of these
(22) Single covalent bonds between carbon atoms is the_______
(a) Sigma bond (b) pi bond (c) Dative bond (d) ionic bond
(23) Number of electrons in valence shell of carbon is
(a) One (b) Two (c) Three (d) Four
(24) Natural gas mostly consists of__________
(a) Ethane (b) Butane (c) Methane (d) Pentane
(25) Methyl has molecular formula________
(a) CH4 (b) CH3 (c) CH (d) CH2
 BY HOSHO OAD
SUBJECT SPECIALIST IN CHEMISTRY
DIST: JAMSHORO TALUKA SEHWAN SHARIF
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(26) Which functional group characterizes amines________
(a) –OH (b) –COOH (c) –CHO (d) –NH2
(27) What is the general formula for alkanes, a class of hydrocarbons_______
(a) CnH2n+2 (b) CnH2n (c) CnHn (d) CnHn–2
(28) The molecular formula of octane is_________
(a) C6H12 (b) C8H16 (c) C8H18 (d) C4H8
(29) The difference between each consecutive member of alkane family is________
(a) CH3 (b) CH4 (c) CH2 (d) All of these
(30) Urea first prepared in laboratory from________
(a) NH2CN (b) NH4CNO (c) N2CNO (d) All of these
(31) A compound with the molecular formula C6H12 is most likely a_______
(a) Alkane (b) Carbohydrate (c) Alkene (d) Alkyne
(32) Which of the following is an example of a carbon single bond hydrocarbon?
(a) Ethene (b) Ethyne (c) Ethane (d) Benzene
(33) Pure hydrocarbons soluble in______
(a) Water (b) Benzene (c) Acetic acid (d) Glucose
(34) What is the name of this compound CH ≡ C – CH2 - CH2 – CH2 – CH3
(a) Butyne (b) Pentene (c) Hexyne (d) Heptyne
(35) How many hydrogen present in Pentene_____
(a) 12 (b) 8 (c) 10 (d) 14
(36) In combustion reaction which one is main product__________
(a) CO (b) NH3 (c) O2 (d) CO2
(37) What is the correct IUPAC name for CH2=CH-CH2-CH3
(a) Methene (b) Ethene (c) Propene (d) Butene
(38) CH3-CH2-CH2- is ________ redical :
(a) Ethyl (b) Propane (c) Propyl (d) Both A & B
(39) What is the correct IUPAC name for CH3-C≡C-CH2-CH2-CH2-CH3?
(a) Heptyne (b) Hexyne (c) 2-heptyne (d) 2-hexyne
(40) What is the correct IUPAC name for CH3-C≡C-CH2-CH2-CH2-C≡C-CH2-CH3?
(a) Decadiyne (b) 1,2-decadiyne (c) 2,7-decadiyne (d) None of these
(41) Which suffix is used for alcohol n IUPAC nomenclature________
(a) -ane (b) -ene (c) -yne (d) -ol
(42) Which element is the most reactive alkali metal?
(a) Lithium (b) Sodium (c) Potassium (d) Rubidium
(43) Which functional group is present in aldehydes________
(a) -OH (b) -COOH (c) -CHO (d) -C≡C-
(44) What is the hybridization of carbon atoms in the benzene ring_______
(a) sp (b) sp2 (c) sp3 (d) None of these
(45) The type of coal that is hard and ranked is________
(a) Peat (b) Lignite (c) Bituminous (d) Anthracite
(46) The number of five member and six membered rings in C60 Bucky ball are respectively_______
(a) 12 and 12 (b) 5 and 15 (c) 12 and 20 (d) 40 and 20
(47) The general formula of the homologous series of alcohol is_____
(a) CnH2n (b) CnH2n+2 (c) CnH2n+1OH (d) None of these
(48) The functional group that contains a nitrogen atom is________
(a) Alcohol (b) Ketone (c) Ester (d) Amide
(49) Formula of a saturated hydrocarbon is C4H8 it should be______________
(a) Butane (b) Butene (c) Butyne (d) None of these
(50) The molecular formula of benzene is_________
(a) C4H10 (b) C6H12 (c) C6H6 (d) C6H14
 A = Atomic number D= –NH2
1. 26.
B = Periods A= CnH2n+2
2. 27.
C= Group trend C= C8H18
3. 28.
A= Sodium D = All of these
4. 29.
A = s-block B= NH4CNO
5. 30.
D= Fluorine C= Alkene
6. 31.
C= Ethane
D= None of these
7. Right= 520 kj/mol 32.
A= Lithium B= Benzene
8. 33.
A = I A & II A C= Hexyne
9. 34.
B = +2 C=10
10. 35.
D = Oxygen D= CO2
11. 36.
A= 0 D = Butene
12. 37.
B = 63.7 oC C= Propyl
13. 38.
A= Form covalent C = 2-heptyne
14. Bond 39.
A = Sodium C= 2,7-decadiyne
15. 40.
C= Potassium D= -ol
16. 41.
B = Yellow B=Sodium
17. 42.
A = NaOH C= -CHO
18. 43.
B = Chlorine Gas B= sp2
19. 44.
C = Oleum D= Anthracite
20. 45.
A = Carbon C= 12 and 20
21. 46.
A= Sigma bond C= CnH2n+1OH
22. 47.
D=Four D= Amide
23. 48.
C= Methane B= Butene
24. 49.
B= CH3 C= C6H6
25. 50.