Gas carbon and Lampblack

Q.

Potash lime is also known as Lead glass.

1. True

2. False

Q. The deposit formed on the sides and roofs of the retort during the destructive distillation of coal is called soot.

1. False
2. True

Q. Choose the correction option regarding the statements given below:

Statement 1: Lampblack is obtained by burning turpentine oil in excess of air.
Statement 2: Lampblack consists of extremely small crystals of carbon.

1. Statement 1 is incorrect but statement 2 is correct.
2. Both statement 1 and statement 2 are incorrect.
3. Both statement 1 and statement 2 are correct.
4. Statement 1 is correct but statement 2 is incorrect.

Q. Choose the correct statement(s) from the following.

1. Heating substances in the excess of air is called destructive distillation.
2. Lampblack consists of extremely small crystals of graphite.
3. Actual density of wood charcoal is less than that of water.
4. Charcoal is prepared by the destructive distillation of coal.

Q. Impure black coloured solution of acetic acid is added to activated charcoal and is heated for a while. The colour of acetic acid changes to its purest form as the impurities are absorbed by activated charcoal. Which of the following characteristics of coal absorbs the impurity?

1. Tough
2. Grey in colour
3. Porous
4. Suffocating smell