Chemistry(General Knowledge > General Science ) Questions and answers for exam Preparation

Question 1. "Paramagnetism" is the property of

Paired electrons
Completely filled electronics subshells
Unpaired electrons
Completely vacant electronic subshells

Explanation:-

Answer: Option C. -> Unpaired electrons

Question 2. The structure of NaCl crystal is

Body centered cubic
Face centered cubic
Octahedral
Square planar

Explanation:-

Answer: Option B. -> Face centered cubic

Question 3. Which one of the following minerals is found in Monazite sand ?

Potassium
Uranium
Thorium
Sodium

Explanation:-

Answer: Option C. -> Thorium

Question 4. The heaviest naturally occurring element is:

Mercury
Polonium
Thorium
Uranium

Explanation:-

Answer: Option D. -> Uranium

Question 5. Which of the following is the main compound of voter ink?

Silver nitrate
Ammonium Chloride
Silver Chloride
Ammonium Nitrate

Explanation:-

Answer: Option A. -> Silver nitrate

Question 6. In which of the following ions , the colour is not due to d-d transition ?

[Ti(H2O)6]3+
[CoF6]3+
[CrO4]2−
[Cu(NH3)4]2+

Explanation:-

Answer: Option C. -> [CrO4]2−

Question 7. What is Zeolite?

Hydrated Aluminosilicate
Hydrated Calcium Sulphate
Dehydrated Aluminosilicate
Dehydrated Calcium Sulphate

Explanation:-

Answer: Option A. -> Hydrated Aluminosilicate

Question 8. The coordination number of body centered atom in cubic structure is

4
6
8
10

Explanation:-

Answer: Option C. -> 8

Question 9. The product, 9-nitroanthracene is obtained from anthracene by the action of

Nitric acid and acetic anhydride
Nitric acid and ethyl alcohol
Nitric acid and acetic acid
Nitric acid in excess

Explanation:-

Answer: Option A. -> Nitric acid and acetic anhydride

Question 10. Peroxyacetyl nitrate is a

Acidic dye
Plant hormone
Vitamin
Secondary pollutant

Explanation:-

Answer: Option D. -> Secondary pollutant