Coal Tar

Q. Question 9
Naphthalene balls are obtained from coal tar and are used as

(a) mosquito repellant
(b) honeybee repellant
(c) moth repellant
(d) snake repellant

Q.

Which substance is used for metalling the roads these days in place of coal tar ?

Q.

The black thick liquid with __________ smell is known as coal tar?

Q.

Coal tar contains about

1. 300 substances

2. 400 substances

3. 200 substances

4. 100 substances

Q.

Name the product of coal which is thick black liquid having an unpleasant smell.

Q. Naphthalene balls are obtained from coal tar and are used as

1. mosquito repellent
2. honey bee repellent
3. moth repellent
4. snake repellent

Q.

Name any five substances used in everyday life which are manufactured starting from the products of coal tar.

Q.

Coal tar is a black, thick------with an --------smell.

Q.

The various compounds present in coal tar are separated by the process of :

(a) simple distillation

(b) destructive distillation

(c) fractional distillation

(d) fractional crystallisation

Q.

Coal tar is used in the manufacture of

1. Synthetic dyes

2. Drugs

3. Perfumes

4. All of these

Q.

Which of these is used to repel moths?

1. Naphthalene balls

2. Bitumen

3. Coal gas

4. Paraffin wax

Q. Match the given compounds with their uses.

1. Power generation
2. Laying roads
3. Reducing agent

Q. Match the following petroleum products with their uses:

1. Motor fuel
2. Candles
3. Road surfacing

Q.

Name an important source from which naphthalene balls are obtained.

Q. Question 5 (d)
State the following statement is True or False:
Coal tar is a mixture of various substances.

Q. Write the uses of bitumen, coke, petrol and CNG

Q. The thick black liquid with an unpleasant smell is a product of coal and is called ___(i)___ . It is used in the manufacturing of ____(ii)_____ .
The information in which alternative completes the given statements?

1. (i) Coke
   (ii) Steel
2. (i) Coke
   (ii) Naphthalene balls
3. (i) Coal tar
   (ii) Steel
4. (i) Coal tar
   (ii) Naphthalene balls

Q.

During the processing of coal to get a coke, coal tar and __________ are also obtained.

Q. In fractional distillation, which of the following phenomenon is used in seperating the different products of petroleum?

1. Gravity seperation
2. Centrifugation
3. Condensation
4. Sublimation

Q. Coal tar has an _________ smell.

1. unpleasant
2. Both (a) & (b)
3. pleasant
4. None of these

Q. _______ can be used as a starting material in the manufacturing of perfumes.

1. Coal gas
2. Coal
3. Coal tar
4. Coke

Q. Coal tar is used in manufacture of _________.

1. drugs
2. synthetic dyes
3. explosives
4. all of these

Q. _______ can be used as a starting material in the manufacturing of perfumes.

1. Coal tar
2. Coal gas
3. Coke
4. Coal

Q.

___ charcoal is obtained by removing water and some other volatile constituents from the animal and vegetation substances.

Q. Naphthalene, which is used to repel moths and other insects is obtained from:

1. Paraffin
2. Petroleum
3. Coal tar
4. Coke

Q. Coal tar is a thick _______(black / yellow) liquid with pleasing smell.

Q. Coal tar is a

1. Black, thick liquid
2. Tough, porous and black substance
3. Gas
4. Dark, oily liquid

Q. What is carbonisation of coal in production of coal tar?

1. Heating of coal in excess of air
2. Heating of coal in absence of air
3. Heating of coal while adding carbon
4. Both B and C

Q. Coal tar is used to manufacture:

1. Synthetic dyes
2. Drugs
3. Perfumes
4. Explosives
5. Plastics
6. Paints
7. Cleaning water
8. Litmus Paper

Q. Coal tar has:

1. an unpleasant smell
2. a pleasant smell
3. no smell
4. none of these