1
Q:

In modern periodic table while going from top to bottom in a group ______.

 

A) size of an atom increases B) size of an atom decreases
C) ionisation energy of an atom increases D)  size and ionisation energy of an atom increases

Answer:   D)  size and ionisation energy of an atom increases



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
Q:

___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.

A) Methane B) Greenhouse
C) Carbon dioxide D) Ozone
 
Answer & Explanation Answer: B) Greenhouse

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0 893
Q:

Which of the following are highly compressible?

A) Solid B) Liquid
C) Gas D) Solid and Liquid
 
Answer & Explanation Answer: C) Gas

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0 919
Q:

Oxide of which of the following will turn red litmus blue?

A) Magnesium B) Phosphorus
C) Sulphur D) Carbon
 
Answer & Explanation Answer: A) Magnesium

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0 867
Q:

Which of the following gases is produced due to incomplete combustion of fuel?

A) Carbon Dioxide B) Carbon Monoxide
C) Methane D) Ethane
 
Answer & Explanation Answer: B) Carbon Monoxide

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3 842
Q:

Why does carbon tetrachloride have no dipole moment?

A) Because of same size of carbon and chlorine atoms B) Because of regular tetrahedral structure
C) Because of planar structure D) Because of similar electron affinities of carbon and chlorine
 
Answer & Explanation Answer: B) Because of regular tetrahedral structure

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4 823
Q:

Which among the following is false about natural rubber?

A) It is an elastomer B) It is a monomer of cis­isoprene
C) Natural rubber is a polymer of chloroprene D) It is heated with sulphur compounds to improve its properties
 
Answer & Explanation Answer: B) It is a monomer of cis­isoprene

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5 909
Q:

Ethane gas has a slightly ______ taste.

A) sweet B) bitter
C) sour D) salty
 
Answer & Explanation Answer: A) sweet

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6 1600
Q:

Which of the following elements has the lowest melting point?

A) Bromine B) Zinc
C) Lead D) Calcium
 
Answer & Explanation Answer: A) Bromine

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1 917