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Social Science · 2026 · 5 marks
CBSE 2026 · Region 5 · Set 3 · Q17
Explain the main characteristics of minerals.Explain the difference between conventional and non-conventional sources of energy.
Explain the main characteristics of minerals.
Explain the difference between conventional and non-conventional sources of energy.
Marking-scheme solution
| |p{$\displaystyle 0.47$\linewidth}|} (a) Explain the main characteristics of minerals. (i) Minerals are found in varied forms in nature, ranging from the hardest diamond to the softest talc. | $\displaystyle 42$- $\displaystyle 50$, |
| (ii) Minerals are usually found in “ores” mixed with other impurities and elements. | |
| (iii) Minerals may occur as metals- iron ore, copper, silver etc, and non-metals- mica, coal, salt, potassium, and limestone. | |
| (iv) Metallic minerals can also be ferrous- iron ore, manganese, nickel, and cobalt and non-ferrous- copper, tin, lead, bauxite. | |
| (v) Minerals can also be precious metallic minerals like gold and silver. | |
| (vi) Some minerals are energy resources- coal, petroleum, and natural gas. | |
| (to be explained. OR | |
| (b) Explain the difference between conventional and non- conventional sources of energy. Non-Conventional Conventional Sources of Energy Sources of Energy. | |
| (i) Conventional sources | |
| (i) Non-conventional sources include: firewood, cattle dung include solar, wind, tidal, cake, coal, petroleum, natural geothermal, biogas and atomic gas and electricity (both hydel energy. and thermal). | |
| (ii) These are finite sources as | |
| (ii) These sources are non- they are limited in quantity. exhaustible. | |
| (iii) These sources cause | |
| (iii) These sources of energy are environmental pollution except eco-friendly. water. | |
| (iv) These are expensive | |
| (iv) These sources of energy are sources of energy. one-time investment. | |
| (v) No residue is left. | |
| (v) Except water, they all leave residue behind. |
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CBSE Class 10 Social Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.