Who discovered Electron?

• Enrico Fermi
• Robert Noyce
• J.J.Thomson
• James Dyson
Correct Option: C  [ J.J.Thomson ]

Remark:

Silviculture is the management of :

• Rivers
• Lakes
• Hills
• Forests
Correct Option: D  [ Forests ]

Remark:

Lack of Vitamin A may cause

• Poor night vision
• Rickets
• Beri Beri
• None of these
Correct Option: A  [ Poor night vision ]

Remark:

Which of the following is a vector?

• Mass
• Volume
• Speed
• Velocity
Correct Option: D  [ Velocity ]

Remark:

Vinegar is chemically a:

• diluted citric acid
• diluted acetic acid
• diluted hydrochloric acid
• diluted oxalic aid
Correct Option: B  [ diluted acetic acid ]

Remark:

Sound waves having frequency less than 20 Hz are called __________ waves.

• Intelligent
• Inferior
• Infrasonic
• Instrumental
Correct Option: C  [ Infrasonic ]

Remark:

Ocean thermal energy is due to:

• tides in the ocean
• pressure difference at different levels in the ocean
• temperature difference at different levels in the ocean
• energy stored by waves in the ocean
Correct Option: C  [ temperature difference at different levels in the ocean ]

Remark:

Sphygmomanometer is an instrument used for measuring

• Heart beat
• Vision of eyes
• Blood Sugar
• Blood Pressure
Correct Option: D  [ Blood Pressure ]

Remark:

Noise levels in residential areas should not exceed:

• 30 decibels
• 100 decibels
• 85 decibels
• 55 decibels
Correct Option: D  [ 55 decibels ]

Remark:

The longest cell in animals is

• Nerve cell
• Hepatocyte (Liver cell)
• Blood cell
• Muscle cell
Correct Option: A  [ Nerve cell ]

Remark: