An acid is said to be weak if?

A. its ions are so completely dissociated that they easily drift apart

B. the acid is not corrosive

C. the acid has low specific gravity

D. its ions move very slowly when in solution

E. its ions are incompletely dissociated

Which of the following statements is correct during the electrolysis of a caustic soda solution using platinum electrodes?

A. Oxygen gas is given off at the cathode

B. Hydrogen gas is given of at the anode

C. Sodium metals is deposited at the anode

D. Sodium metal is deposited at the cathode

E. AAlkalinity at the cathode increases

An amphoteric oxide is an?

A. amorphous oxide of a metal

B. amorphous oxide of a non-mental

C. oxide that is insoluble in water

D. oxide that behaves both as a base as well as an acid

E. oxide that loses its oxygen on sublimation

Water is poured over a white solid and a colourless neutral gas is evolved which burns with a sooty flame. The white solid is?

A. calcium

B. calcium oxide

C. calcium carbide

D. sodium peroxide

E. sodium sulphate

Cotton is almost pure?

A. starch

B. protein

C. animal fibre

D. celluose

E. mineral fibre

Which of the following types of reactions takes place between C₂H₄ and the halogens?

A. Substitution

B. Polymerization

C. Addition

D. Saponification

E. Oxidation

The product formed at the the cathode during the electrolysis of sodium chloride solution with carbon electrodes is?

A. sodium

B. chlorine

C. hydrogen

D. sodium hydroxide

E. oxygen

Sodium carbonate crystals on exposure to a dry atmosphere change to a white powder. This phenomenon is known as?

A. deliquescence

B. hygroscopy

C. oxidation

D. efforescence

E. sublimation

Which of the following statements is incorrect?

A. Calcium reacts with water to form calcium

B. Magnesium reacts very slowly with water but faster with warm water

C. Iron will not react with water in the absence of air

D. Sodium reacts with water

E. Copper reacts with steam

In the reaction NH3 + H+ → NH4+, the bond formed results from?

A. an electron transferred from NH₃ + H⁺

B. an electron pair donated by NH₃

C. an electron pair equally shared

D. an electron pair donated by H⁺

E. an electron tarnsferred from H⁺ to NH₃