Which one of the following sets of Elements was primarily responsible for the origin of life on the earth?

• Hydrogen, Oxygen, Carbon, Sodium
• Oxygen, Carbon, Calcium, Phosphorus
• Carbon, Hydrogen, Oxygen, Nitrogen
• Carbon, Hydrogen, Nitrogen, Potassium
Correct Option: C  [ Carbon, Hydrogen, Oxygen, Nitrogen ]

Remark:

Olive ridley is related to:

• turtle
• cease fire violations
• terrorist killings
• migratory bird
Correct Option: A  [ turtle ]

Remark:

What does the airbag, used for safety of car driver, contain?

• Sodium bicarbonate
• Sodium azide
• Sodium nitrite
• Sodium peroxide
Correct Option: B  [ Sodium azide ]

Remark:

Growth hormone is produced by :

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

Remark:

What is reason for using red light as a stop signal ?

• Long wavelength
• Short wavelength
• Chromogenic effect
• Infra Red
Correct Option: A  [ Long wavelength ]

Remark:

Which of the following can cause depletion of Ozone layer ?

• Hydrogen Sulphide
• Smoke
• Aerosols
• Hydrogen gas
Correct Option: C  [ Aerosols ]

Remark:

Which of the following is not a biofertilizer ?

• Rhizobium
• Mucor
• Azotobacter
• Anabaena
Correct Option: B  [ Mucor ]

Remark:

A CD-ROM is a kind of:

• Optical disk
• Magnetic disk
• Fibre disk
• None of these
Correct Option: A  [ Optical disk ]

Remark:

Which of the following is not correct ?
(a) Exercise does not help in managing psychological discomfort.
(b) Exercise increases cardio-respiratory fitness.
(c) Exercise reduces risk of diabetes.
(d) Exercise helps in managing bone health.

• Exercise does not help in managing psychological discomfort.
• Exercise increases cardio-respiratory fitness.
• Exercise reduces risk of diabetes.
• Exercise helps in managing bone health.
Correct Option: A  [ Exercise does not help in managing psychological discomfort. ]

Remark:

The number of milk teeth in man is

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

Remark: