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



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Subject: Chemistry
Exam Prep: Bank Exams
Q:

Which gas contributes most to the Greenhouse effect?

A) Water vapour B) Ozone
C) Oxygen D) Nitrogen
 
Answer & Explanation Answer: A) Water vapour

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Exam Prep: Bank Exams , CAT

1 985
Q:

Which of the following molecules is joined by a double covalent bond?

A) Cl2 B) O2
C) N2 D) He2
 
Answer & Explanation Answer: B) O2

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Exam Prep: AIEEE , Bank Exams

0 1204
Q:

Release of which among the following is the primary reason for depletion of the ozone layer?

A) Nitrous oxide B) Hydrogen dioxide
C) Chlorofluro carbon D) Carbon monoxide
 
Answer & Explanation Answer: C) Chlorofluro carbon

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0 1112
Q:

Which one of the following is a bad Thermal Conductor?

A) Aluminium B) Copper
C) Glass D) Silver
 
Answer & Explanation Answer: C) Glass

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0 812
Q:

Rusting is _____.

A) Electrolysis B) Oxidation
C) Redox reaction (Oxidation and Reduction) D) Reduction
 
Answer & Explanation Answer: C) Redox reaction (Oxidation and Reduction)

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2 1152
Q:

Which amongst the following is not a Cation?

A) Aluminium ion B) Copper ion
C) Sulphate ion D) Zinc ion
 
Answer & Explanation Answer: C) Sulphate ion

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0 1178
Q:

Which of the following is not a component of Smog?

A) Volatile organic compounds B) Nitrogen Oxide
C) Sulphur dioxide D) Chlorine oxide
 
Answer & Explanation Answer: D) Chlorine oxide

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0 973
Q:

Which among the following is an endothermic reaction?

A) Respiration B) Combustion
C) Sweating D) Burning of natural gas
 
Answer & Explanation Answer: C) Sweating

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0 1349