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:

Pure gold is of

• 24 Carat
• 18 Carat
• 22 Carat
• None of these
Correct Option: A  [ 24 Carat ]

Remark: A "carat" is a unit of measurement used to express the weight of gemstones, particularly diamonds and gold etc.

Which of the following is the structural and functional unit of kidneys?

• Nephron
• Pits
• Nutrofil
• Tentacle
Correct Option: A  [ Nephron ]

Remark:

What is deposited on iron in the process of galvanisation?

• Copper
• Zinc
• Tin
• Aluminium
Correct Option: B  [ Zinc ]

Remark:

Dehydration in human body is caused due to the loss of

• salts
• water
• hormones
• vitamins
Correct Option: B  [ water ]

Remark:

When a bus starts suddenly, the passengers sitting in the bus lean backward. This is because of :

• Inertia of rest
• Inertia of motion
• Momentum
• Gravity of the earth
Correct Option: A  [ Inertia of rest ]

Remark:

Alcohol contains :

• nitrogen, hydrogen, oxygen
• carbon, hydrogen, oxygen
• oxygen, carbon, nitrogen
• hydrogen, chlorine, oxygen
Correct Option: B  [ carbon, hydrogen, oxygen ]

Remark:

The growth of bacteria is measured by:

• hemocytometer
• spectrophotometer
• calorimeter
• auxanometer
Correct Option: B  [ spectrophotometer ]

Remark:

The pale yellow colour of urine is due to the presence of which pigment?

• Urophyll
• Urochrome
• Chlorophyll
• Chloroplast
Correct Option: B  [ Urochrome ]

Remark:

Hepatitis affects which organ of the human body?

• Liver
• Pancreas
• Spleen
• Small intestine
Correct Option: A  [ Liver ]

Remark: