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Chemistry 1

The document contains a series of chemistry questions and answers covering topics such as chemical reactions, electrochemistry, and molecular structures. It includes specific compounds, reaction types, and properties of elements. The format suggests it is likely part of an educational assessment or study material.

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22 views1 page

Chemistry 1

The document contains a series of chemistry questions and answers covering topics such as chemical reactions, electrochemistry, and molecular structures. It includes specific compounds, reaction types, and properties of elements. The format suggests it is likely part of an educational assessment or study material.

Uploaded by

vidush673
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as TXT, PDF, TXT or read online on Scribd
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chemistry1

Question 1
i) (a) 1,2-dibromo ethane
ii) (d) 3 moles of hydrogen gas
iii) (b) Ions gain electrons at the cathode
iv) (b) X
v) (a) Only W
vi) (a) Calcium chloride
vii) (a) Ostwald's process
viii) (b) An atom of oxygen has the same mass as 8 molecules of hydrogen
ix) (d) CH---CH
x) (a) Al2O3
xi) (a) Both A and R are true, and R is the correct explanation of A
xii) (c) I>Br>Cl>F (Number of orbits)
xiii) (b) X- CuO, Y- black, Z-reducing agent
xiv) (d) R and S
xv) (b) D=A<b<C

Question 2
i) a) Oxidizing electrode- electrode A (Anode); Reducing electrode- electrode B
(Cathode)
b) Electrode A is the anode, which is made up of thick blocks of impure copper
ore; Electrode B is the cathode, which is made up of thin strips of impure copper
c) Cathode reaction: (Cu+) + (e-) --> Cu; Anode reaction: Cu - (e-) --> (Cu+)
d) The Anode becomes thinner and thinner as it gets dissolved in the
electrolyte, in the electrolytic process. The Cathode becomes thicker and thicker
as the pure copper gets deposited on it
e) Aluminum is also electro refined like copper

ii) a) Aluminium + chlorine - (2) Synthesis


b) Iron + sulphuric acid - (4) Displacement
c) Lead nitrate + sodium chloride - (1) Precipitation
d) Potassium hydroxide + nitic acid - (5) Neutralization by titration
e) Copper oxide + sulphuric acid - (3) Neutralization

iii)
a) 17, 17
b) ionization, dissociation
c) unreactive, native
d) liquid ammonia, evaporates
e) alkyl, functional

iv)
a) Zinc oxide (ZnO)
b) Lead hydroxide [Pb(OH)2]
c) Platinum (Pt)
d) dilute Nitric acid (HNO3)
e) Oxygen (2,4)

v)
a)
1) 1,1,1,2,2,2-hexachloro ethane or Hexachloro ethane C2Cl6
2) 3-methyl but-1-yne
3) C3H7COOH
b)
1) 2-bromo-4-chloro-hexane
2) 2-methyl butan-1-al

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