Which of the following is NOT an allotrope of carbon?

• Diamond
• Graphite
• C-60
• Methane
Correct Option: D  [ Methane ]

Remark:

One (1) molecule of CFC deplete __________ molecule of Ozone in the Ozonosphere.

• 1,00,000
• 10,000
• 10,00,000
• No one of the above
Correct Option: A  [ 1,00,000 ]

Remark:

A man inside a moving train tosses a coin, the coin falls behind him. The train is moving:

• forward with a uniform speed
• backward with a uniform speed
• forward with deceleration
• forward with acceleration
Correct Option: D  [ forward with acceleration ]

Remark:

The age Of trees is determined by its

• height
• girth
• general appearance
• growth rings
Correct Option: D  [ growth rings ]

Remark:

The study of hair and its diseases is known as:

• Penology
• Trichology
• Penology
• Pomology
Correct Option: B  [ Trichology ]

Remark:

Cobalt-60, commonly used in radiation therapy, emits :

• Alpha rays
• Beta rays
• Gamma rays
• X-rays
Correct Option: C  [ Gamma rays ]

Remark:

The number of milk teeth in man is

• 28
• 29
• 20
• 12
Correct Option: C  [ 20 ]

Remark:

Hydro?uoric acid is not kept in glass bottles because it reacts with:

• visible light
• sodium oxide of glass
• aluminium oxide of glass
• silicon dioxide of glass
Correct Option: D  [ silicon dioxide of glass ]

Remark:

Human beings hearing range is:

• 30 to 30,000 Hz
• 50 to 50,000 Hz
• 20 to 20,000 Hz
• 40 to 40,000 Hz
Correct Option: C  [ 20 to 20,000 Hz ]

Remark:

All enzymes are actually

• Protein
• Carbohydrates
• Fatty acids
• Steroids
Correct Option: A  [ Protein ]

Remark: