set 3 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on metals, non metals, minerals, ores, properties, uses topic of general science mcq
- Soils
- Animals
- Plants
(a) (i) and (ii) only
(b) (iii) only
(c) (i) and (iii) only
(d) (i), (ii) and (iii)
The correct answers to the above question in:
Answer: (d)
Nitrogen is an essential constituent of all vegetables and animal proteins.
Soil contains nitrogen as ammonium salts.
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Read more chemistry gk Based General Science Questions and Answers
Question : 1
Why is nitrogen molecule chemically less active?
a) It has high electronegativity
b) It has high dissociation energy
c) It has small atomic radius
d) It has stable electronic configuration
Answer »Answer: (b)
Question : 2
The metalloids include the elements
a) Germanium, Tellurium
b) Boron, Silicon
c) Arsenic, Antimony
d) All of these
Answer »Answer: (b)
Both boron and silicon are metalloids.
Question : 3
Which of the following mineral does not contain Al ?
a) Feldspar
b) Cryolite
c) Mica
d) Fluorspar
Answer »Answer: (d)
Fluorspar (CaF2 ),
Cryolite (Na3AlF6 ),
Feldspar (KAlSi3O8) and
Mica (K2O.3Al2O3 .6SiO2 .2H2O)
Question : 4
Naturally occuring substances from which a metal can be profitably (or economically) extracted are called?
a) Gangue
b) Minerals
c) Ores
d) Salts
Answer »Answer: (c)
Question : 5
Which of the following is a good conductors of heat and electricity?
a) Chlorine
b) Graphite
c) Oxygen
d) Nitrogen
Answer »Answer: (b)
Graphite is the only non-metal, which is a good conductor of heat and electricity.
Question : 6
Which one among the following does not have an allotrope?
a) Sulphur
b) Nitrogen
c) Oxygen
d) Carbon
Answer »Answer: (b)
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