Question

Choose the correct answer


1. SI unit of temperature is ______

a) celsius b) fahrenheit

c) kelvin d) ampere

2. The spherical mirror used as a rear view mirror in the vehicle is

a) concave mirror b) convex mirror

c) plane mirror d) None of the above

3. The range of audible frequency for the human ear is

a) 2 Hz to 2000 Hz b) 20 Hz to 2000 Hz

c) 20 Hz to 20000 Hz d) 200 Hz to 20000 Hz

4. The non-metal which conducts electric current is

a) carbon b) oxygen

c) aluminium d) sulphur

5. We brush our teeth with tooth paste because it is __________ in nature.

a) basic b) acidic

c) Both a and b d) None of these

6. The main component of natural gas is __________

a. methane b. ethane

c. propane d. butane



7. Expand CNG. List out its uses.

8. What is global warming?

9. Mention the various conditions required for a chemical reaction to occur.

10. What is ductility?

11. Distinguish between natural and artificial magnets?​

Answer 1

Answer:

1. C)

2. A)

3. C)

4. C)

5. A)

6. A)