Threat of 'global warming' is increasing due to increasing concentration in the atmosphere of:

• O₃
• CO₂
• SO₂
• NO₂
Correct Option: B  [ CO₂ ]

Remark:

Red blood corpuscles are formed in:

• Heart
• Bone marrow
• Liver
• Kidney
Correct Option: B  [ Bone marrow ]

Remark:

Which of the following is NOT an allotrope of carbon?

• Diamond
• Graphite
• C-60
• Methane
Correct Option: D  [ Methane ]

Remark:

The brain of any computer system is:

• Control Unit
• Monitor
• CPU
• ALU
Correct Option: C  [ CPU ]

Remark:

The moon takes __________ days to go round the earth once.

• 28 days
• 45 days
• 50 days
• 65 days
Correct Option: A  [ 28 days ]

Remark:

Which of the following retains the information when the power to the system is shut down?

• CPU
• ROM
• RAM
• DIMM
Correct Option: B  [ ROM ]

Remark:

"Seahorse" is a:

• Mammal
• Plant
• Fish
• None of the above
Correct Option: C  [ Fish ]

Remark: Seahorse (Hippocampus) is a tiny fish that named for the shape of its head, which looks like the head of a tiny horse. There are at least 50 species of seahorses.

Which instrument is used for measuring humidity of atmosphere?

• Barometer
• Anemometer
• Thermometer
• Hygrometer
Correct Option: D  [ Hygrometer ]

Remark:

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:

Through the fused sodium chloride, electric current can pass out due to the presence of:

• Free electron
• Free ion
• Free molecule
• None of these
Correct Option: B  [ Free ion ]

Remark: