A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into

A. CH₃CH₂CH₂CH₃

B. CH₂ = CH - CH₂CH₃

C. HC≡CH

D. CH₃ - C = C - CH₃

The boiling of fat and aqueous caustic soda is referred to as

A. hydrolysis

B. esterification

C. acidification

D. saponification

The most important use of hydrogen is in the

A. manufacture of ammonia

B. manufacture of methyl alcohol

C. manufacture of ethyl alcohol

D. hydrogenation of oils

Which of the following polymers is suitable for packaging and electrical insulation?

A. polyamide

B. polyethene

C. polycarbonate

D. polystyrene

Hydrogen is readily released when dilute hydrochloric acid reacts with

A. Cu

B. Na

C. Au

D. Ag

The intermediate product formed when ethanol is progressively oxidized to ethanoic acid with potassium heptaoxodichromate (IV) is

A. butanal

B. ethanal

C. methanal

D. propanal

A rock sample was added to cold dilute HNO₃. The gas evolved was passed into a solution of acidified K₂Cr₂O₇ and the solution turned green. The sample contains

A. Cl^-

B. NO₃^-

C. SO₃^2-

D. SO₄^2-

Which of the following statement is true of a proton?

A. The mass of a proton is 1840 times the mass of electron

B. the total mass of the protons in a particular nucleus is always half the nuclear size

C. The mass of a proton is one - twelfth the molar mass of carbon

D. The mass of a proton is 1.0008g

Which of the following chloride would exhibit the least ionic character?

A. MgCl₂

B. CaCl₂

C. LiCl

D. AlCl₃

A fixed mass of gas has a volume of 92cm₃ at 3 ^oC. When will be its volume at 18 ^oC if the pressure remains constant

A. 15.3cm³

B. 87.3cm³

C. 552.0cm³

D. 97.0cm³