Question

_____ appears as a bright head with a long tail. The tail grows in size as it approaches the sun.

1 point

a) Asteroid

b) Comet

c) Planet

d) Meteor

Clear selection

12. _____ are minor planets that revolve around the sun and are located between Mars and Jupiter.

1 point

a) comet

b) Planet

c) Meteor

d) Asteroid

13. What radiations are absorbed by carbon dioxide?

1 point

a) Ultrared radiations

b) Infrared radiations

c) Ultraviolet radiations

d) Cosmic rays

14. Discolouration of Taj Mahal is due to _____________.

1 point

a) Excess heat

b) Acid rain

c) Reaction with carbon compounds

d) Its age

15. CNG is a _________.

1 point

a) Polluted fuel

b) Pollution free fuel

c) Harmful fuel

d) None of the above

16. Which fuel has the highest calorific value?

1 point

a) Methane

b) Hydrogen

c) Coal

d) Petrol

17. If you have only 5 seconds to ignite an object, which one would you select?

1 point

a) Glass

b) Wood

c) Paper

d) Coal

18. Combustion is always a _____________ change.

1 point

a) Chemical

b) Physical

c) Reversible

d) Slow

19. Which of the following fuels will be easy to store?

1 point

a) Fuel A, ignition temperature 30°C

b) Fuel B, ignition temperature 130°C

c) Fuel C, ignition temperature 480°C

d) Fuel D, ignition temperature 90°C

20. ___________ has the characteristics of good fuel.

1 point

a) Coal

b) Coke

c) Butane

d) Petrol

21. The victim of the fire has to be removed to open space so as to counter the effect of_________.

1 point

a) Smoke

b) Carbon dioxide

c) Oxygen

d) Water vapour

​

Answer 1

Answer:

ok

Explanation:

mark as a brainilist

Answer 2

Answer:

If x and y are inversely proportional, then which one is true? *

4 points

x1/y1 = x2/y2

x1/x2 = y1/y2

x1/x2 = y2/y1

x1.x2 = y1.y2

Explanation:

If x and y are inversely proportional, then which one is true? *

4 points

x1/y1 = x2/y2

x1/x2 = y1/y2

x1/x2 = y2/y1

x1.x2 = y1.y2

ans is comet