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
(a) zinc
(b) mercury
(c) sodium
(d) tungsten
The correct answers to the above question in:
Answer: (b)
Mercury is the only element even being metal is liquid at room temperature.
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Read more chemistry gk Based General Science Questions and Answers
Question : 1
Which one of the following is the softest?
a) Aluminium
b) Iron
c) Sodium
d) Copper
Answer »Answer: (c)
Question : 2
Which is the most reactive metal?
a) Calcium
b) Iron
c) Sodium
d) Potassium
Answer »Answer: (d)
Question : 3
Yellow colour of usual nitric acid is due to the presence of which one of the following?
a) NO
b) N25
c) N2O
d) NO2
Answer »Answer: (d)
Question : 4
Iron is obtained from
a) Pitch-blende
b) Monazite Sand
c) Limestone
d) Hematite
Answer »Answer: (d)
Question : 5
Which of the following metals reacting with sodium hydroxide solution produce hydrogen gas?
- Cu
- Al
- Fe
- Zn
a) A and D
b) B and D
c) B and C
d) B only
Answer »Answer: (a)
Question : 6
Chemically ‘Plaster of Paris’ is
a) Calcium Carbonate
b) Calcium Oxide
c) Calcium Sulphate
d) Calcium Oxalate
Answer »Answer: (c)
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