Chemistry MCQ based Gk Questions for UPSC, NDA, SSC, CDS, UPPSC and other examinations.

1. What is the freezing point of water?

a) 300 K
b) 428 K
c) 273 K
d) 373 K

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2. What is the correct molecular formula of aluminum chloride?

a) Al3Cl
b) AlCl3
c) AlCl
d) ClAl3

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3. Which gas is filled in food packets to prevent them from decaying?

a) O2
b) CO2
c) N2
d) SO2

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4. What is the formula of baking soda?

a) NaHCO3
b) NaCl
c) Na2CO3
d) KOH

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5. Which is the ore of aluminum?

a) Copper
b) Haematite
c) Bauxite
d) Cuprite

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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

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7. Who discovered the neutron?

a) Mendel
b) Chadwick
c) Rutherford
d) Ohm

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8. From which method can pure sugar be recovered from a sugar solution?

a) Distillation
b) Evaporation
c) Crystallization
d) Sublimation

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9. Which is a heterogeneous mixture?

a) Sugar solution
b) Air
c) Mixture of sand and water
d) Carbonated water

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10. Which is not a matter?

a) Iron
b) Air
c) Water
d) Light

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