Welcome to the chemistry MCQ GK Questions section of the Learner’s anthem. in this post, we have provided chemistry MCQ with answers for competitive exams.
1.what is the freezing point of water?
a. 300 K
b. 428 K
c. 273 K
d. 373 K
c. 273 K
The water freezes when its temperature comes to 273 K
2.what is the correct molecular formula of aluminum chloride?
a. al3cl
b. alcl3
c. alcl
d. clal3
b. alcl3
3. which gas is filled in foods packets to prevent it from decaying?
a. o2
b. co2
c. n2
d.so2
c. n2 or nitrogen
4. what is the formula of baking soda?
a. nahco3
b. NaCl
c. na2co3
d. Koh
a. nahco3
5. which is the ore of aluminum?
a. copper
b. haematite
c. bauxite
d. cuprite
c. bauxite
6. which solution converts the colorless solution into blue when copper is put in it?
a. silver nitrate solution
b. copper sulfate solution
c. sodium chloride solution
d. baking soda solution
a. silver nitrate solution
7. who discovered neutron?
a. Mendel
b. Chadwick
c. rutherford
d. ohm
b. Chadwick
8. from which method pure sugar can be recovered from sugar solution?
a. distillation
b. evaporation
c. crystallization
d. sublimation
c. crystallization
9. which is a heterogeneous mixture?
a. sugar solution
b. air
c. mixture of sand and water
d. carbonated water
c. mixture of sand and water
10. which is not a matter?
a. iron
b. air
c. water
d. light
d. light
A matter is something which has mass and occupies some space.
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