Catalytic hydrogenation of oils results in the production of

A. soaps

B. detergents

C. alkanes

D. butter

E. margarine

Which of the following reaction will not take place under normal conditions?

A. Zn_(s) + 2HCI_2(aq) + H _2(g)

B. Fe _(s) + H ₂SO_4(aq) → FeSO_4(aq) + H_2(g)

C. Cu _(s) + 2HCI _(aq) → CuCI _2(aq) + H_2(g)

D. Ca_(s) + 2H Ca(OH)_2(g)

E. 2Na_(s) + 2H ₂O ₍₁₎ → 2NaOH_(aq) + H_2(g)

A sample of orange juice is suspected to have been contaminated with a yellow dye. Which of the following methods can be used to detect the dye?

A. Decantation

B. Chromatography

C. Distillation

D. Filtration

E. Evaporation

The electronic configuration 1s^{2 2}2s ²2p ⁶3s²3p ⁶ is that of a

A. noble gas

B. Group ll element

C. Group lll element

D. Group V element

E. Group VI element

The heat accompanying the reaction represented by the equation H₂O _(l) → H ₂O_(g) is described as the heat of

A. solution

B. neutralization

C. vaporization

D. sublimation

E. activation

Aluminum is above iron in the electrochemical series, yet iron corrodes easily on exposure to air while aluminium does not. This is because aluminium

A. has a lower density than iron

B. is a better conductor than iron

C. does not corrode spontaneously

D. forms thin layer of inert oxide in moist air

E. forms amphoteric oxides while iron does not

When a solid melts and consequently boils, there is

A. a gradual increase in the average kinetic energy of the particles

B. a sudden decrease in the kinetic energy of the particles

C. no change in the average kinetic energy of the particles

D. a rapid change in the nature of bonding of the components

E. a change in the size of the fundamental particles