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:

Which one of the following is an ohmic conductor?

A) Germanium B) Silicon
C) Carbon D) Silver
 
Answer & Explanation Answer: D) Silver

Explanation:
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2 1170
Q:

The commonly used coolant in refrigerators is

A) Ammonia B) Nitrogen
C) Freon D) Oxygen
 
Answer & Explanation Answer: C) Freon

Explanation:
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2 1897
Q:

Phosphorus is kept in water because

A) its ignition temperature is very high B) its ignition temperature is very low 
C) its critical temperature is high D) its critical temperature is low
 
Answer & Explanation Answer: A) its ignition temperature is very high

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4 940
Q:

The depletion in Ozone layer is caused by ___________ .

A) Nitrous oxide B) Carbon dioxide
C) Chlorofluorocarbons D) Methane
 
Answer & Explanation Answer: C) Chlorofluorocarbons

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2 928
Q:

Name the gas used in preparation of bleaching powder

A) Oxygen B) Hydrogen
C) Nitrogen  D) Chlorine
 
Answer & Explanation Answer: D) Chlorine

Explanation:
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0 1086
Q:

Magnesium is a constituent metal of __________

A) Chlorophyll molecule B) DNA
C) Mitochondria D) Ribosomes
 
Answer & Explanation Answer: A) Chlorophyll molecule

Explanation:
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0 1881
Q:

Researchers at the University of Illinois have discovered new form of matter called Excitonium which was coined by ______ in the 1960’

A) Bertrand Halperin B) Eugene Wigner
C) Paul Dirac D) Felix Bloch
 
Answer & Explanation Answer: A) Bertrand Halperin

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0 822
Q:

Which among the following is an example of mixture?

A) Milk B) Gasoline
C) Liquefied petroleum gas D) All options are correct
 
Answer & Explanation Answer: D) All options are correct

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1 1297