Which of the following raw materials is used in the plastic industry?

A. Ethene

B. Methane

C. Sulphur

D. Hydrogen

Which of the following organic compounds can undergo both addition and substitution reactions?

A. Pentane

B. Benzene

C. Propane

D. Hexane

Which of the following equations represents a redox reaction?

A. \(HNO_{{3}{(aq)}} + NaOH_{(aq)} \to NaNO_{{3}{(aq)}} + H_{2}O_{(l)}\)

B. \(AgNO_{{3}{(aq)}}+KCl_{(aq)} \to AgCl_{(s)}+KNO_{{3}{(aq)}}\)

C. \(CaCO_{{3}{(s)}} \to CaO_{(s)} + CO_{{2}{(g)}}\)

D. \(2H_{2}S_{(s)} + SO_{{2}{(g)}} \to 2HO_{2} + 3S_{(g)}\)

The process of extraction of iron from its ore is

A. decomposition

B. oxidation

C. reduction

D. sublimation

What is the solubility of a salt if 0.4g of it is obtained on evaporating 200\(cm^{3}\) of its saturated solution to dryness?

A. 0.08\(gdm^{-3}\)

B. 2.00\(gdm^{-3}\)

C. 8.00\(gdm^{-3}\)

D. 80.00\(gdm^{-3}\)

An acidic salt has

A. double anions in its aqueous solution

B. a single cation in its aqueous solution

C. hydrogen ions in its aqueous solution

D. hydrogen atoms in its aqueous solution

A reaction is endothermic if the

A. reaction vessel feels cool during the reaction

B. enthalpy change is negative

C. bond forming energy exceeds bond breaking energy

D. heat of formation of reactants exceeds heat of formation of products

In which of the following compounds does hydrogen form ionic compounds?

A. CH\(_{4}\)

B. HCl

C. NH\(_{3}\)

D. NaH

An organic compound has the empirical formula \(CH_{2}\). If its molar mass is 42\(gmol^{-1}\), what is its molecular formula? (C = 12.0, H = 1.0)

A. \(C_{2}H_{4}\)

B. \(C_{3}H_{4}\)

C. \(C_{3}H_{6}\)

D. \(C_{4}H_{8}\)

Consider the following reaction equation: \(Br_{2} + 2KI \to 2KBr + I_{2}\). Bromine is acting as

A. an oxidizing agent

B. a reducing agent

C. an acid

D. a base