Which of the following statements about volatile liquids is correct? They have

A. high vapour pressure and low boiling point

B. high vapour pressure and high boling point

C. low vapour pressure and low boining point

D. low vapour pressure and high boiling point

The type of energy changes that accompany the mixing of a strong acid to a strong base is

A. electrical

B. heat

C. light

D. sound

Zinc oxide is said to be amphoteric because it

A. forms an acid salt

B. is an insoluble base

C. forms a double salt

D. reacts with a base or an acid

Which of the following substances with the corresponding pH value is an alkali?
Substance pH

A. Lime 2.4

B. Banana 4.6

C. Distilled water 7.0

D. Milk of magnesia 10.5

The gases produced when Cu(NO₃)_2(s) was heated are

A. NO and NO₂

B. O₂ and NO

C. NO₂ and N₂O₄

D. O₂ and NO₂

Which of the following salts on hydrolysis would give an alkaline solution?

A. NH₄CI_(s)

B. AICI_3(s)

C. CH₃COONa_(s)

D. NH₄NO_3(s)

Consider the reaction represented by the following equation: Na₂CO_3(aq) + 2HCl_(aq) \(\longrightarrow\) 2NaCl_(aq) + H₂O_(l) + CO_2(g) . What volume of 0.02 mol dm^-3 Na₂CO_3(aq) would be required to completely neutralize 40 cm³ of 0.10 mol dm

A. 200 cm³

B. 100 cm³

C. 40 cm³

D. 20 cm³

Which of the following factors would affect the equilibrium constant?

A. Concentration

B. Temperature

C. Pressure

D. Volume

Consider the reaction represented by the following equation: N_2(g) + 3H_2(g) ⇌ 2NH_{3(g); ∆H^ϴ = -xkJ mol^-1. Which of the following conditions would increase the yield of NH3?}

A. Addition of iron catalyst

B. Increase in the temperature of the system

C. Increase in the volume occupied by reactants

D. Increase in the total pressure of the system

The reaction that occurs all the anode when CuSO_4(aq) is electrolyzed using carbon electrode is

A. 2H ^- _(aq) + 2e → H _2(g)

B. Cu²⁺ _(aq) + 2e → Cu _(s)

C. 4OH _{(aq) -}4e → 2H₂O_(l) + O2 _(g)

D. SO_4(aq)² _-2e → SO _2(g) + O_2(g)