Which layer of gas in the atmosphere protects us from harmful ultra violet rays of the sun?

• Oxygen
• Carbon dioxide
• Nitrogen
• Ozone
Correct Option: D  [ Ozone ]

Remark:

What is the purpose of 'Anemometer'?

• To measure blood pressure.
• To measure the velocity and to find the direction of wind.
• To measure altitude.
• none of these.
Correct Option: B  [ To measure the velocity and to find the direction of wind. ]

Remark:

In a computer, the parity bit is added for the purpose of:

• Coding
• Error detection
• Controlling
• Indexing
Correct Option: B  [ Error detection ]

Remark:

Gasoline is obtained from crude petroleum by:

• Fractional distillation
• Fractional distillation
• Sublimation
• Evaporation
Correct Option: A  [ Fractional distillation ]

Remark:

Which one of the following solutions will not turn blue litmus to red litmus?

• Lemon juice
• Acetic acid
• Sodium hydroxide
• Hydrochloric acid
Correct Option: C  [ Sodium hydroxide ]

Remark:

Fruits of this plant are found underground

• Potato
• Carrot
• Groundnut
• Onion
Correct Option: C  [ Groundnut ]

Remark:

Seismology is the science of :

• Atmosphere
• Earthquake
• Fossil
• Silkworm breeding
Correct Option: B  [ Earthquake ]

Remark:

Which among the following helps in circulation of blood ?

• Arithrocytes
• Blood platelets
• Monocytes
• Lymphocytes
Correct Option: D  [ Lymphocytes ]

Remark:

Sound causes hazardous noise pollution at decibels:

• Above 50
• Above 80
• Above 100
• Above 130
Correct Option: B  [ Above 80 ]

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: