Which of the following compounds is an alkanoate?

A. CH₃COOH

B. CH₃COOCH₃

C. CH₃CH₂OH

D. CH₃CH₂COOH

What is C_aH_b in the following equation? C _a
H _b + 5O₂ → 3CO ₂ + 4H₂O

A. C ₃H₄

B. C₃H₆

C. C₃H₈

D. C ₅H ₁₀

Greenhouse effect can be reduced by controlling

A. water evaporation

B. burning wood and fossil fuel

C. the use of aerosols

D. the use of artificial fertilizers

Waste plastics accumulate in the soil and pollute the environment because plastic materials are

A. insoluble in water

B. non -biodegradable

C. easily affected by heat

D. inflammab,le

Which of the following substance is an ore of iron?

A. Bauxite

B. Cassiterite

C. Haematite

D. Steel

The ammonium compound used in the manufacture of dry cells is

A. NH₄NO₃

B. (NH₄)SO₄

C. NHCI₄

D. (NH₄)₂CO₃

Which of the following equations represents a substitution reaction?

A. C ₂H_10(g) + CI _2(g) → C₄H₉ CI_(g) + HCI_(g)

B. C ₂H_4(g) + HCI _(g) → C ₂H₅ CI_(l)

C. C₂H_2(g) + 2H _2(g) → C ₂H_6(g)

D. C ₃H_4(g) + 40_2(g) → 3CO_2(g) + 2H ₂O_(g)