General Science Class 6 MCQS

Which of the following is not an example of concave mirror?

1. Cosmetic mirror
2. Dentist mirror
3. Security mirror
4. Car headlight mirror

A region in a longitudinal wave where the particles are closest together is called?

1. Rarefaction
2. Compression
3. Crest
4. Trough

A region on a longitudinal wave where the particles are furthest apart is called?

1. Rarefaction
2. Compression
3. Crest
4. Trough

The flash of light from lightening travels at about:

1. 2 x 10^5 m/s
2. 1 x 10^4 m/s
3. 5 x 10^6 m/s
4. 3 x 108 m/s

The speed of sound is maximum in:

1. Gases
2. Solids
3. Liquids
4. Plasma

The speed of sound is minimum in:

1. Solids
2. Liquids
3. Gases
4. Plasma

The speed of sound in air is:

1. 332 m/s
2. 345 m/s
3. 333 m/s
4. 354 m/s

The speed of sound in aluminium is:

1. 5620 m/s
2. 6420 m/s
3. 7220 m/s
4. 4820 m/s

In which of the following, speed of the sound is maximum?

1. Gold
2. Sea water
3. Air
4. Space

In which of the following, the speed of sound is minimum?

1. Brick
2. Air
3. Lead
4. Copper