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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
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Which category of Hydrogen releases water vapour and a by product when burnt?

 

A) Green Hydrogen B) Blue Hydrogen
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What is the common name of the solution of calcium hydroxide?

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Answer & Explanation Answer: A) Lime water

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_______contributes towards global warming so it is called a greenhouse gas.

 

A) Oxygen B) Nitrogen
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Answer & Explanation Answer: D) Methane

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Which of the following is an example of compound?

 

A) Manganese B) Air
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Answer & Explanation Answer: D) Ammonia gas

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Q:

Which of the following group does NOT follow Newlands Law of Octaves?

 

A) Li, Na B) Be, Mg  
C) C, Si   D) Mn, Hg
 
Answer & Explanation Answer: D) Mn, Hg

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The hardest natural substance is

A) Graphite B) Diamond
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Answer & Explanation Answer: B) Diamond

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What is the number of atoms constituting a molecule known as?

A) Atomicity B) Atomic mass
C) Atomic number D) Isotopes
 
Answer & Explanation Answer: A) Atomicity

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