An F1 car is mostly made up of which material ?

• Plastic
• Carbon fibre
• Steel
• Aluminium

Through the fused sodium chloride, electric current can pass out due to the presence of:

• Free electron
• Free ion
• Free molecule
• None of these

Which one among the following is strong smelling agent used in LPG cylinder to help in the detection of gas leakage?

• Ethanol
• Thioethanolanine
• Methane
• Chloroform

The mountaineers carry oxygen with them because:

• at an altitude of more than 5 km there is no air
• the amount of air available to a person on mountain is lesser than that available on the ground
• the temperature of air is lesser than that on the ground.
• The pressure of air is higher than that on the ground.

Which of the following is an example of static electricity ?

• Glass rod rubbed with silk cloth
• Ebonite rod rubbed with wool
• Lightening in the sky
• All of the above

Sound-waves from a loud speaker is caused by:

• frequency
• vibrations
• pitch
• amplitude

Magnetic effect of current gives rise to which force ?

• mechanical
• frictional
• spring
• gravitational

Quality of petrol is expressed in:

• Gold number
• Cetane number
• Methane number
• Octane number

What is the rarest blood type in the world ?

• A
• O positive
• AB ^_
• B

Which of the following is not a biofertilizer ?

• Rhizobium
• Mucor
• Azotobacter
• Anabaena