Average distance of the earth from the Sun is:

• 150 Million km
• 15 Million km
• 90 Million km
• 900 Million km
Correct Option: A  [ 150 Million km ]

Remark:

Which quantity is increased in step-down transformer?

• Voltage
• Current
• Wattage
• Frequency
Correct Option: B  [ Current ]

Remark: a step-down transformer the voltage is stepped down, or reduced, and the current is increased.

The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is:

• Argon
• Xenon
• Helium
• Krypton
Correct Option: C  [ Helium ]

Remark:

If a sample of soil is found to have a pH value of 8.25, it is:

• acidic
• neutral
• alkaline
• None of the above
Correct Option: C  [ alkaline ]

Remark:

Which one of the following animals is not "warm-blooded"?

• Hen
• Tiger
• Bat
• Toad
Correct Option: D  [ Toad ]

Remark: frogs and toads are cold-blooded. This means their body temperatures change to match the temperatures of their environment.

What is condensation?

• Change of Solid into liquid
• Change of vapour into liquid
• Change of Liquid into Gas
• None of these
Correct Option: B  [ Change of vapour into liquid ]

Remark:

How much blood does a man have in his body?

• 4 %
• 10 %
• 7 %
• None of these
Correct Option: C  [ 7 % ]

Remark:

Sound causes hazardous noise pollution at decibels:

• Above 50
• Above 80
• Above 100
• Above 130
Correct Option: B  [ Above 80 ]

Remark:

Which of the following gases constitutes the major portion of the atmosphere by volume ?

• Oxygen
• Argon
• Nitrogen
• Carbon dioxide
Correct Option: C  [ Nitrogen ]

Remark:

Persistence of vision is the principle behind:

• Camera
• Binocular
• Cinema
• Periscope
Correct Option: C  [ Cinema ]

Remark: