RADAR is used for

• locating submerged submarines
• receiving signals in a radio receiver
• locating geostationary satellites
• detecting and locating the position of objects such as aeroplane
Correct Option: D  [ detecting and locating the position of objects such as aeroplane ]

Remark:

A device that allows computer users to communicate with one another over telephone lines is called:

• Microprocessor
• Network
• Assembler
• Modem
Correct Option: D  [ Modem ]

Remark:

Growth hormone is produced by :

• Bones
• Pituitary gland
• Thyroid gland
• Adrenal gland
Correct Option: B  [ Pituitary gland ]

Remark:

Which of the following is not a nucleon?

• proton
• neutron
• electron
• positron
Correct Option: D  [ positron ]

Remark:

Which of the following is an Inert Gas?

• Hydrogen
• Nitrogen
• Oxygen
• Argon
Correct Option: D  [ Argon ]

Remark:

__________ is the first missile developed in India.

• Agni
• Aakash
• Trishul
• Prithvi
Correct Option: D  [ Prithvi ]

Remark:

Thyroid gland is located

• near the heart
• at the base of the brain
• below the liver
• in the neck region
Correct Option: D  [ in the neck region ]

Remark:

In plants, meiotic cell division takes place in the:

• root tip
• shoot tip
• flowers
• fruits
Correct Option: C  [ flowers ]

Remark: Meiosis is a type of cell division in which the number of chromosomes is halved (from diploid to haploid) in the daughter cells, i.e., the gametes. In plant it takes place in Flower.

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.
Correct Option: B  [ the amount of air available to a person on mountain is lesser than that available on the ground ]

Remark:

What chemicals are used in fire extinguishers used in houses and offices ?

• Water, potassium bicarbonate and fluorocarbon
• Water, calcium hydroxide and chlorofluorocarbons
• Water, potassium hydroxide and chlorobenzene
• None of these
Correct Option: A  [ Water, potassium bicarbonate and fluorocarbon ]

Remark: