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 31: Which of the following is found in cotton
Options:
A) Starch
B) Cellulose
C) Fat
D) Oil
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The correct answer is B .
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Question 32: Tartaric acid is used industrially to
Options:
A) make baking powder
B) make fruit juice
C) remove rust
D) dry substance
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The correct answer is A .
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Question 33:
If a solution contains 4.9g of tetraoxosulphate (VI) acid, calculate the amount of copper (II) oxide that will react with it
[Cu = 64, O = 16, S = 32, H = 1]
Options:
A) 0.8g
B) 4.0g
C) 40.0g
D) 80.0g
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The correct answer is B .
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Question 34: During the vulcanization of rubber, sulphur is added to
Options:
A) Break down rubber polymer
B) Lengthen the chain of rubber
C) Bind rubber molecules together
D) Act as a catalyst
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The correct answer is C .
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Question 35: Which of the following properties is not peculiar to matter?
Options:
A) Kinetic energy of particles increases from solid to gas
B) Random motion of particles increases from gas to solid
C) Orderliness of particles increases from gas to liquid
D) Random motion of particles increases from liquid to gas
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The correct answer is B .
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Question 36: Given the mean atomic mass of chlorine prepared in the laboratory to be 35.5 and assuming that chlorine contains two isotopes of mass number 35 nad 37, what is the percentage composition of the isotope of mass number 35?
Options:
A) 20
B) 25
C) 50
D) 75
E) 90
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The correct answer is D .
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Question 37:
What is the IUPAC name for the following compound? HCCCH
Options:
A) Acetylene
B) Methyl acetylene
C) Butanol
D) Decanoic acid
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The correct answer is B .
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Question 38: Which of the gases is employed as an anaesthesia?
Options:
A) N 2O
B) NO2
C) NH3
D) NO
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The correct answer is A .
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Question 39: Equal moles of ethyne and hydrogen iodide react to give
Options:
A) CH2 = CH2
B) CH2 - CHI
C) CH3 - CI
D) CH2 = CHI
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The correct answer is D .
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Question 40: 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 .