A colourless gas with characteristics odour which dissolves in water to form an alkaline solution is

A. ammonia

B. carbon(IV)oxide

C. hydrogen chloride

D. sulphur (IV) oxide

E. sulphur (VI) oxide

Which of the following equations is NOT balanced?

A. CH₄(g) + 20₂(9) → CO₂(g) + 2H₂O(g)

B. CU(S) + HNO₃(aq) → Cu(NO₃)₂(aq) + 4H₂O(I) + NO(g)

C. 2KCIO₃(s) → 2KCI(s)+ 3O₂(g)

D. NaH(s) + H₂O(1) → NaOH(aq) +H₂(g)

E. Na₂SO₄(aq) + BaCl₂(aq) → BaSO₄(s) + 2NaCl(aq)

The process involved in the decomposition of sugar by an enzyme is called

A. dehydration

B. esterification

C. fermentation

D. polymerization

E. saponification

Compound with the general formula C_nH_2n2 belong to the_______ group

A. alkanal

B. alkane

C. alkanoate

D. alkene

E. alkyne

Which of the following non-metals reacts most readily with metals?

A. Carbon

B. Chlorine

C. Nitrogen

D. Phosphorus

E. Sulphur

The percentage composition of a hydrocarbon is 79.2 carbon 20.8 hydrogen. Calculate its empirical formula [H = 1, C = 12]

A. CH

B. CH₃

C. CH₄

D. C₂H₂

E. C₂H₆

The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT

A. HOCH₂ – CH₂OH

B. H₂C –C =C– CH₃

C. H₃C – HC = CH₂

D. H₂C = CH₂

E. H₃C – C =CH

The scientist who discovered the zig-zag movement of gas molecules is

A. Brownian

B. Dalton

C. Gay Lussac

D. Graham

E. Newton

Which of the following is NOT a fraction of petroleum?

A. Bitumen

B. Coal

C. Diesel

D. Kerosene

E. Petrol

Which of the following statements is NOT correct of group VII elements? They

A. are diatomic

B. are good oxidizing agents

C. are highly electronegative

D. have high electron affinity

E. have relatively low ionization potentials