1000 Best General Science MCQ-Questions
General Science MCQ- Objective Questions (Physics, Chemistry, Biology)
Q1). Brass gets discoloured in air because of the presence of which of the following gases in air?
a).Oxygen
b).Hydrogen sulphide
c).Carbon dioxide
d).Nitrogen
Correct Answer:
Hydrogen sulphide
Explanation:
Q2). Which of the following is a non metal that remains liquid at room temperature?
a).Phosphorous
b).Bromine
c).Chlorine
d).Helium
Correct Answer:
Bromine
Explanation:
Q3). Chlorophyll is a naturally occurring chelate compound in which central metal is
a).copper
b).magnesium
c).iron
d).calcium
Correct Answer:
magnesium
Explanation:
Q4). Which of the following is used in pencils?
a).Graphite
b).Silicon
c).Charcoal
d).Phosphorous
Correct Answer:
Graphite
Explanation:
Q5). Which of the following metals forms an amalgam with other metals?
a).Tin
b).Mercury
c).Lead
d).Zinc
Correct Answer:
Mercury
Explanation:
Q6). Chemical formula for water is
a).NaAlO
b).HO
c).AlO
d).CaSiO
Correct Answer:
HO
Explanation:
Q7). The gas usually filled in the electric bulb is
a).nitrogen
b).hydrogen
c).carbon dioxide
d).oxygen
Correct Answer:
nitrogen
Explanation:
Q8). Washing soda is the common name for
a).Sodium carbonate
b).Calcium bicarbonate
c).Sodium bicarbonate
d).Calcium carbonate
Correct Answer:
Sodium carbonate
Explanation: