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 111: The mass of silver deposited when a current of 10A is passed through a solution of silver salt for 4830s is – (Ag = 108 F = 96500(mol-1)
Options:
A) 54.0g
B) 27.0g
C) 13.5g
D) 108.0g
Show Answer
The correct answer is A .
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Question 112: Which of the following alloys contain iron?
Options:
A) Duralumin and steel
B) Brass and bronze
C) Steel and permalloy
D) Soft solder and duralumin
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The correct answer is C .
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Question 113: Atomicity of ozone is
Options:
A) 1
B) 2
C) 3
D) 4
Show Answer
The correct answer is C .
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Question 114:
Which quantum divides shells into orbitals?
Options:
A) Spin
B) Principal
C) Azimuthal
D) Magnetic
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The correct answer is C .
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Question 115: The reddish-brown rust on iron roofing sheets consists of
Options:
A) Fe3+(H2O)6
B) FeO.H2O
C) Fe2O3.3H2O
D) Fe3O4.2H2O
Show Answer
The correct answer is C .
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Question 116: CxHY + 4O2 → 3CO2 + 2H2O. The hydrocarbon, CxHY, in the reaction above is?
Options:
A) propane
B) propene
C) propyne
D) propanone
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The correct answer is C .
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Question 117: In the laboratory preparation of ethyl ethanoate, the water present in the mixture is removed using a solution of
Options:
A) an hydrous CaCl4
B) concentrated NaCO4
C) dilute NaOH
D) concentrated H4SO4
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The correct answer is D .
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Question 118:
220g of carbon dioxide contains ----- moles
Options:
A) 5
B) 6
C) 3
D) 4
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The correct answer is A .
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Question 119: The constituents of baking powder that makes the dough to rise is
Options:
A) NaHCO3
B) NaOH
C) Na2CO3
D) NaCl
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The correct answer is A .
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Question 120: The hydrocarbon used in the production of styrene is
Options:
A) ethyne
B) propyne
C) ethane
D) ethene
Show Answer
The correct answer is D .