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:

In plants, extra-chromosomal DNA is found in

• Nucleus
• Chloroplast
• Ribosome
• Golgi bodies
Correct Option: B  [ Chloroplast ]

Remark: In many cases, extrachromosomal DNA is contained in cytoplasmic organelles, such as mitochondria (animals), and in chloroplasts and plastids (plants).

Which of the following is an example of static electricity ?

• Glass rod rubbed with silk cloth
• Ebonite rod rubbed with wool
• Lightening in the sky
• All of the above
Correct Option: D  [ All of the above ]

Remark:

The nearest planet to the sun is:

• Venus
• Mars
• Mercury
• Jupiter
Correct Option: C  [ Mercury ]

Remark:

Acid rain is caused due to the pollution of environment by:

• Carbondioxide and Nitrogen
• Carbon monoxide and Carbondioxide
• Ozone and Methane
• Some oxide of Nitrogen and Sulpher
Correct Option: D  [ Some oxide of Nitrogen and Sulpher ]

Remark: Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air

Norman E. Borlaug is associated with

• Green Revolution
• White Revolution
• Pink Revolution
• Blue Revolution
Correct Option: A  [ Green Revolution ]

Remark: Norman E. Borlaug was awarded the Nobel Peace Prize in 1970 in recognition of his contributions to global food production.

The gas used for artificial ripening of green fruit is:

• Ethylene
• Ethane
• Carbon dioxide
• None of these
Correct Option: A  [ Ethylene ]

Remark:

The element used for vulcanizing rubber is:

• sulphur
• bromine
• silicon
• phosphorus
Correct Option: A  [ sulphur ]

Remark:

Metals can be beaten into sheets, because:

• they are ductile
• they are soft
• they are malleable
• the metal particles are loosely arranged
Correct Option: C  [ they are malleable ]

Remark:

According to ISRO, Chandrayaan-2 moon mission will explore which area of the moon ?

• Moon North Pole
• Moon South Pole
• Moon North-West part
• Unexplored part of the Moon
Correct Option: B  [ Moon South Pole ]

Remark: