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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 of the following compounds from nitrites with nitrous acid?

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Answer & Explanation Answer: D) All of these

Explanation:

The acid and the nitrite form nitrous acid which then reacts with the amine.

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Which one of the following is an insulator?

A) copper B) wood
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Answer & Explanation Answer: B) wood

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Zeolite is

A) hydrated ferric oxide B)  hydrated sodium aluminium silicate
C)  sodium hexameta phosphate D)  sodium tetra borate
 
Answer & Explanation Answer: B)  hydrated sodium aluminium silicate

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The most extensive use of molasses after fermentation is for producing

A) Methanol B) Sugar
C) Ethanol D) Sugarcane
 
Answer & Explanation Answer: C) Ethanol

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Q:

Acid rain is caused due to pollution of atmosphere by

A)  oxides of nitrogen and sulphur B)  oxides of nitrogen and phosphorous
C) oxides of carbon and nitrogen D)  oxides of nitrogen and methane
 
Answer & Explanation Answer: C) oxides of carbon and nitrogen

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Which metal is responsible for Itai-Itai disease?

A) Cadmium B) Nickel
C) Chromium D) Mercury
 
Answer & Explanation Answer: A) Cadmium

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Which among the following is an example of solid sol?

A) Milk of magnesia B) Foam
C) Coloured gemstones D) Rubber
 
Answer & Explanation Answer: C) Coloured gemstones

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Q:

How many elements are present in the group of the 18th Modem Periodic Table?

A) 5 B) 2
C) 6 D) 7
 
Answer & Explanation Answer: D) 7

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