A rocket functions on which of the following laws ?

• Newtons first law
• Newtons second law
• Newtons third law
• All of the above
Correct Option: C  [ Newtons third law ]

Remark:

In a society the growth and development that meets the current human needs and also conserves natural resources for future generations is known as:

• Green economy
• Holistic development
• Sustainable development
• Subsistence agriculture
Correct Option: C  [ Sustainable development ]

Remark:

The acid present in the stomach of human beings is:

• HNO₃
• H₂CO₃
• HCl
• H₂SO₄
Correct Option: C  [ HCl ]

Remark:

Which of the following statements is not correct ?

• Silver Revolution refers to increased pulse production.
• White Revolution refers to increased milk production.
• Green Revolution refers to increased production of food grains.
• Yellow Revolution refers to increased oil-seed production.
Correct Option: A  [ Silver Revolution refers to increased pulse production. ]

Remark:

Which quantity remains constant in parallel connection of resistance?

• Electric current flow rate
• Potential difference
• Amount of electricity
• Both the potential difference and amount of electricity
Correct Option: B  [ Potential difference ]

Remark:

A heavy stone appears to be lighter in water. This is due to

• Upward pressure of water
• Downward pressure of water
• Lateral pressure of water
• None of these
Correct Option: A  [ Upward pressure of water ]

Remark: Water creates upward pressure due to the principle of buoyancy, as described by Archimedes' principle.

Sound travels fastest in

• Vacuum
• Steel
• Water
• Air
Correct Option: B  [ Steel ]

Remark:

A transformer is used to :

• Increase or decrease D.C voltage
• Increase or decrease A.C voltage
• Convert A.C to D.C
• Convert D.C into A.C
Correct Option: B  [ Increase or decrease A.C voltage ]

Remark:

Tetraethyl lead (TEL) is

• a catalyst used in burning fossil fuel
• an antioxidant
• a reductant
• an antiknock compound
Correct Option: D  [ an antiknock compound ]

Remark:

Decibel is the unit used for

• intensity of light
• intensity heat
• intensity of sound
• frequency of radio wave
Correct Option: C  [ intensity of sound ]

Remark: