Coal and Its Types

Q.

Describe how coal is formed from dead vegetation? What is this process called?

Q.

What is the colour of lead oxide ?

Q.

Write two important uses of coke.

Q.

Which type of glass is heat resistant?

1. Hard glass

2. Flint glass

3. Pyrex glass

4. Bottle glass

Q.

Anthracite coal has the highest carbon content.

1. True

2. False

Q.

_________ gives blue colour to the glass.

1. Cobalt oxide

2. Ferrous oxide

3. Manganese dioxide

4. Chromium (III) oxide

Q.

small quantity of light green coloured substance is heated .in the beginning, it loses some water
and then suffocating gas is evolved and a red residue is left behind. Answer the following:
a) Name the red residue and write its formula.
b) Name the suffocating gas or gases and write its formula.
c) Name the light green coloured substance and write its formula.

Q. Teflon is used for making:

1. Plastic bags
2. Blankets
3. Non-stick cookware
4. Furniture

Q.

Coke is almost the purest form of carbon.

1. True
2. False

Q.

Coal is processed in industries to get some useful products. Which of the following is not obtained from coal?

1. Coke

2. Coal tar

3. Coal gas

4. CNG

Q.

The percentage of carbon in anthracite is only 57%.

1. True

2. False

Q.

The carbon content of lignite coal type is________

1. 97%

2. 67%

3. 57%

4. 83%

Q.

Choose the option that correctly ranks the types of coals based on their carbon content.

1. Anthracite > Bituminous > Lignite > Peat

2. Anthracite >Lignite > Bituminous > Peat

3. Bituminous > Anthracite > Lignite > Peat

4. Lignite > Bituminous > Anthracite > Peat

Q.

Which of these is used to repel moths?

1. Naphthalene balls

2. Bitumen

3. Coal gas

4. Paraffin wax

Q.

Write the name of different types of glass and their uses?

Q.

Among the given options, choose the correct option/s for the glass that is most commonly used to make laboratory glassware.

1. Soda-lime glass

2. Borosilicate glass

3. Soft glass

4. Flint Glass

Q. The glass which appears dark in sunlight and clear in dark is known as

1. Flint glass
2. None of these
3. Pyrex
4. Jema glass

Q. Lenses in spectacles are manufactured using ______.

1. Borosilicate glass
2. Hard glass
3. Flint glass
4. Soft glass

Q.

Which of the following is used in the preparation of a pesticide?

1. Coal gas

2. Paraffin wax

3. Naphthalene balls

4. Bitumen

Q. Match the type of coal with its carbon content.

$\begin{array}{cccc}& \text{Column-1}& & \text{Column-II}\\ \text{A.}& \text{Peat}& \text{P.}& \text{94\%}\\ \text{B.}& \text{Lignite}& \text{Q.}& \text{83\%}\\ \text{C.}& \text{Anthracite}& \text{R.}& \text{67\%}\\ \text{D.}& \text{Bituminous}& \text{S.}& \text{57\%}\end{array}$

1. $A\to S,B\to R,C\to Q,D\to P$
2. $A\to R,B\to S,C\to Q,D\to P$
3. $A\to S,B\to R,C\to P,D\to Q$
4. $A\to R,B\to S,C\to P,D\to Q$

Q.

The fractional distillation of coal tar yields

1. carbon disulphide

2. carbon tetrachloride

3. kerosene oil

4. benzene

Q.

Apart from silicon dioxide, borosilicate glass contains_______ and __________

1. Boron oxide

2. Calcium carbonate

3. Lead oxide

4. Aluminium oxide

Q. Which of the following substances are manufactured using coal?

1. Producer gas
2. Petrol
3. Graphite
4. Synthetic petrol

Q. ___ is the grade of coal that has the lowest carbon content.

Q. ___is the grade of coal that has the highest carbon content.

Q.

Name a few varieties of glass.

Q.

Manganese dioxide is a type of

1. negative catalyst

2. positive catalyst

3. biological catalyst

4. non- catalyst

Q. Amorphous silicon is a ___ coloured powder.

Q. Select the various forms of silicon

1. Crystalline silicon
2. Amorphous Silica
3. Crystalline silica
4. Amorphous Silicon

Q.

The amount of impurities in coke is very low.

1. True

2. False