Which among the following elements increases the absorption of water and calcium in plants ?

• Manganese
• Boron
• Copper
• Molybdenum
Correct Option: B  [ Boron ]

Remark:

Which is an example of pollution-free energy?

• Coal
• Wind energy
• Mineral oil
• None of these
Correct Option: B  [ Wind energy ]

Remark:

The type of crop which is able to fix nitrogen from air is known as:

• Legume
• Rice
• Tuber
• Potato
Correct Option: A  [ Legume ]

Remark:

Which of the following is not a property of acids ?

• All acids have sour taste
• All acids are corrosive in nature
• For acidic solutions pH = <7
• Acids tum red litmus to blue
Correct Option: D  [ Acids tum red litmus to blue ]

Remark:

If a liquid is heated in space under no gravity, the transfer of heat will take place by process of:

• conduction
• convection
• radiation
• cannot be heated in the absence of gravity
Correct Option: C  [ radiation ]

Remark:

One kilometre is equal to how many miles?

• 0.84
• 0.5
• 1.6
• 0.62
Correct Option: D  [ 0.62 ]

Remark:

Entomology is the science that studies:

• The origin and history of technical and scientific terms.
• Insects
• The formation of Rocks
• Behavoiur of human beings
Correct Option: B  [ Insects ]

Remark:

Which of the following diseases is caused by virus ?

• Cholera
• Typhoid
• Tuberculosis
• Small Pox
Correct Option: D  [ Small Pox ]

Remark:

RADAR is used for

• locating submerged submarines
• receiving signals in a radio receiver
• locating geostationary satellites
• detecting and locating the position of objects such as aeroplane
Correct Option: D  [ detecting and locating the position of objects such as aeroplane ]

Remark:

Purity of milk is tested by:

• Electrometer
• Lactometer
• Radiometer
• Refractometer
Correct Option: B  [ Lactometer ]

Remark: