Question

3. A fuel, that is not obtained by refining petroleum, is-
(a) petrol
(b) diesel (c) kerosene (d) biogas
4. Out of the following, the energy source, that is a renewable energy
source, is-
(a) petrol
(b) wind
(c) diesel
(d) coal
5. Coal, a common fossil fuel, is formed-
(a) from the waste of animals.
(b) from dead sea-creatures.
(c) by decay of water plants.
(d) by decay of vegetation, under heat and high pressure, over a long
period of time
thino me se ek hi batana hai​

Answer 1

Answer:

3. (D) BIOGAS

4. (B) wind

5. (D) by decay of vegetation, under heat and high pressure over a long period of time.

Answer 2

3. A fuel, that is not obtained by refining petroleum is (d) biogas

4. Out of the following, the energy source, that is a renewable energy

source, is (b) wind.

5.Coal, a common fossil fuel, is formed (d) by decay of vegetation, under heat and high pressure, over a long period of time

Explanation:

1.Biogas is composed mostly of methane (CH4), the same compound in natural gas, and carbon dioxide (CO2). The methane content of raw (untreated) biogas may vary from 40%–60%, with CO2 making up most of the remainder along with small amounts of water vapor and other gases.

2.Wind is a renewable energy source. Overall, using wind to produce energy has fewer effects on the environment than many other energy sources.

3.Coal is a sedimentary deposit composed predominantly of carbon that is readily combustible.

4.Coal is black or brownish-black, and has a composition that (including inherent moisture) consists of more than 50 percent by weight and more than 70 percent by volume of carbonaceous material.