Chemistry is the study of the substances that make up matter. It looks at their properties, how they react with each other, and how these reactions can create new substances.
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Question 2131: When chlorine Is passed into water and the resulting solution exposed to sunlight, the product formed are
Options:
A) Chlorine gas and hydrogen
B) Oxygen and oxochlorate (I) acid
C) Chlorine gas and oxochlorate (I) acid
D) Hydrochloric acid and oxygen
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The correct answer is D .
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Question 2132: When the kerosene fraction from petrol is heated at high temperature, a lower boiling liquid is obtained. This process is known as
Options:
A) polymerization
B) refining
C) hydrogenation
D) cracking
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The correct answer is D .
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Question 2133:
Oxygen is absent in?
Options:
A) Kerosene
B) Soil
C) Glass
D) Cement
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The correct answer is A .
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Question 2134: One of the major uses of alkane is
Options:
A) as domestic and industrial fuel
B) in the hydrogenation of oils
C) in the textile industries
D) in the production of plastics
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The correct answer is A .
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Question 2135:
In the experiment above, a current was passed for 10 minutes and 0.63g of copper was found to be deposited on the cathode of CuSO4 cells. The weight of silver deposited on the cathode og AgNO3 cell during the same period would be? [Cu = 63, Ag = 108]
Options:
A) 0.54g
B) 1.08g
C) 1.62g
D) 2.16g
E) 3.24g
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The correct answer is B .
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Question 2136: The arrangement of particles in crystal lattices can be studied using
Options:
A) X-rays
B) -rays
C) -rays
D) -rays
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The correct answer is A .
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Question 2137: The oxidation state of oxygen on tetraoxosulphate iv acid is
Options:
A) -4
B) -2
C) 4
D) -8
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The correct answer is B .
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Question 2138:
In the upper atmosphere, the ultra-violet light breaks off a free chlorine atom from chlorofluorocarbon molecule. The effect of this is that the free chlorine atom will
Options:
A) be very reactive and will attack ozone
B) be non-reactive and will not attack ozone
C) not change the level of ozone in the atmosphere
D) increase the level of ozone in the atmosphere
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The correct answer is A .
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Question 2139: When ethene gas reacts with chlorine gas to form 1, 2-dichloroethene, the reaction is called?
Options:
A) substitution
B) addition
C) polymerization
D) hydrolysis
E) reduction
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The correct answer is B .
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Question 2140: The densities of two gases, X and Y are 0.5gdm-3 and 2.0gdm-3 respectively. What is the rate of diffusion of X relative to Y?
Options:
A) 0.1
B) 0.5
C) 2.0
D) 4.0
Show Answer
The correct answer is C .