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 261: Geometric isomerism can exist in
Options:
A) hex-3-ene
B) hexane
C) prop-l-ene
D) 3-methyl but -l-ene
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The correct answer is A .
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Question 262: The volume occupies by 1.58g of a gas at s.t.p is 500cm3. What is the relative molecular mass of the gas? (G.M.V at s.t.p = 22.40dm3)
Options:
A) 28
B) 32
C) 44
D) 71
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The correct answer is D .
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Question 263: Which of the following is a neutralization reaction? Addition of
Options:
A) nitric acid to hydrochloric acid
B) nitric acid to sulphuric acid
C) nitric acid to distilled water
D) nitric acid to sodium hydroxide
E) sodium chloride to distilled water
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The correct answer is D .
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Question 264: Which of the following fraction is used as raw material for the cracking process?
Options:
A) kerosine
B) lubricating oil
C) bitumen
D) diesel oils
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The correct answer is D .
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Question 265: 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 266: The monomer of nylon is
Options:
A) Hydroxybenzene
B) Hexanedioic acid
C) Benzene -1,-4-dicarboxylic acid
D) Ethane-1,2-diol
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The correct answer is B .
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Question 267: In a flame test for calcium, the flame appears
Options:
A) green when viewed through a blue glass
B) blue when viewed through a blue glass
C) orange -red when viewed through a blue glass
D) brick-red when viewed through a blue-glass
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The correct answer is D .
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Question 268: The reddish–brown rust on ion roofing sheets consists of
Options:
A) Fe3 + (H2O)6
B) FeO.H2O
C) Fe2O3.3H2O
D) Fe3O4.2H22O
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The correct answer is C .
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Question 269: The oxidation state of Cr in K2Cr2O7 is
Options:
A) +7
B) +6
C) +5
D) 4
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The correct answer is B .
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Question 270: The group IA metals are not found free in nature because they
Options:
A) are very reactive and unstable
B) are malleable and ductile
C) have high melting and boiling point
D) conduct heat and electricity
Show Answer
The correct answer is A .