When steam is passed over white-hot coke, the products are

A. carbon (IV) oxide and nitrogen

B. carbon (II) oxide and hydrogen

C. carbon (ll) oxide and nitrogen

D. carbon (lV) oxide and steam

The maximum number of electrons that can accommodated in the shell having the principal quantum number 3 is

A. 3

B. 9

C. 10

D. 18

E. 32

Methanol is obtained from wood by

A. esterification

B. bacterial decomposition

C. combustion

D. fractional distillation

E. destructive distillation

Study carefully the reaction represented by the equation below.
2H₂O _2(l) → O _2(g) + 2H₂O_(l). Which of the following will not reaction increase the reaction rate?

A. Heating the hydrogen peroxide

B. Adding a pinch of MnO₂ to the reactant

C. increasing the concentration of the H₂O₂

D. Adding water to the reactant

E. Exposing the reactant to sunlight

Which of the following processes is a physical reaction?

A. Electrolysis

B. Hydrolysis

C. Allotropic change

D. Neutralization

E. Corrosion

If the volume of a given mass of gas at 298 K and pressure of 205.2 x 10\(^3\) Nm\(^{-2}\) is 2.12dm\(^3\), what is volume of the gas at s.t.p? (Standard pressure = 101.3 x 10\(^3\) Nm\(^{-2}\), Standard temperature = 273K)

A. 39.3dm ³

B. 22.4dm³

C. 4.93dm³

D. 3.93dm³

E. 0.393dm³

The following acids are monobasic except

A. methanoic acid

B. dioxonitrate lll acid

C. ethanedioic acid

D. oxochlorate (l) acid

E. hydrobromic acid

The reactions ethyne are mainly

A. substitution reactions

B. addition reactions

C. addition polymerization

D. catalytic hydrogenation

E. catalytic halogenation