Very Short Answer-Class 10 – Social Science -Geography-Chapter 5 Minerals and Energy Resources

Class 10-Very Short Answer-5- Minerals and Energy Resources

Q1. How do minerals occur in sedimentary rocks?

Ans : In sedimentary rocks, minerals occur in beds or layers. They have been formed as a result of deposition, accumulation and concentration in horizontal strata.

Q2. What are conventional sources of energy?

Ans :Conventional sources of energy generally non-renewable sources of energy which have been in common use for a long time. Example: firewood, coal, natural gas, etc.

Q3. Why should the use of cattle cake as fuel be discouraged?

Ans : The use of cattle cake as fuel should be discouraged because it creates pollution. It consumes most valuable manure which could be used in agriculture.

Q4. What are placer deposits?

 Ans : Certain mineral deposits that occur in sands of valley floors and the base of the hills as alluvial deposits are called placer deposits.

Q5. Name the gulf that provides ideal conditions for utilising tidal energy in India.

Ans : Gulf of Khambhat and Gulf of Kachchh in Gujarat provide ideal conditions for utilising tidal energy in India.

Q6. What are ‘placer deposits’? Give examples of minerals found in such deposits.

 Ans : a. Certain minerals may occur as alluvial deposits in sands of valley floors and base of hills. These deposits are called ‘placer deposits’.

b. They generally contain minerals which are not corroded by water.

c. Gold, silver, tin and platinum are examples of some important minerals found in ‘placer deposits’.

Q7. What are the uses of copper? Name the two leading copper producing states of India.

 Ans : Uses of copper:

a. In manufacturing electrical cables.

b. In electronic industries.

c. In chemical industries.

The two leading copper producing states of India are Madhya Pradesh and Rajasthan.

Q8. Explain three factors that make mineral extractions commercially viable.

 Ans : a. The minerals content of the ore must be in sufficient concentration.

 b. The type of formation or structure in which they are found determines the relative cases with which mineral ores may be mined.

c. The mineral should be close to the market so that the transportation cost is low.

Q9. Which are the potential sources of biogas? State any four benefits of biogas.

Ans : Potential sources of biogas are: Shrubs, farm wastes, animal waste, human waste, etc. Four benefits of biogas are:

a. Its calorific value is high.

b. It burns without smoke, causing no pollution.

 c. It is the cheapest gaseous fuel.

d. Biogas plants provide twin benefits to the farmer in the form of energy and improved quality of manure.

Q10. “Natural gas is considered an environment friendly fuel.” Explain the statement in two points.

Ans :Natural gas is used as a source of energy as well as an industrial raw material.

a. It can be transported easily through pipelines.

b. Pipelines have helped in setting up fertilizer plants and power plants on its way.

c. Natural gas is a clean source of energy.

d. It is an environment friendly fuel because of the low carbon emission.

Q11. Describe any three important uses of coal as a source of energy.

 Ans : Importance of coal as a source of energy in India are:

a. Coal is the most abundantly available fossil fuel in India.

b. It provides a substantial part of the nation’s energy needs.

c. It is used for power generation.

d. It supplies energy to industry as well as for domestic needs.