43
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
44
Which of the following types of reactions takes place between C2H6 and the halogens?
- A. Substitution
- B. Polymerization
- C. Addition
- D. Saponification
- E. Oxidation
45
Cotton is almost pure?
- A. starch
- B. protein
- C. animal fibre
- D. celluose
- E. mineral fibre
46
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
47
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
48
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
49
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