Q: Brass gets discoloured in air due to constant exposure in presence of:

A: Aluminium sulphide

B: Aluminium phosphide

C: Hydrogen sulphide

D: Hydrogenated wafers



Correct Option: C  [ Hydrogen sulphide ]

Remark:


Q: Which of the following is the structural and functional unit of kidneys?

A: Nephron

B: Pits

C: Nutrofil

D: Tentacle



Correct Option: A  [ Nephron ]

Remark:


Q: The pH of human blood is:

A: 7.2

B: 7.8

C: 6.6

D: 7.4



Correct Option: D  [ 7.4 ]

Remark:


Q: Which of the following diseases is not caused by virus ?

A: Small pox

B: AIDS

C: Flue

D: Malaria



Correct Option: D  [ Malaria ]

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Q: To an astronaut in space, the sky appears to be:

A: Red

B: White

C: Dark

D: Blue



Correct Option: C  [ Dark ]

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Q: Which gas in its solid state is also known as dry ice?

A: Nitrogen

B: Carbon dioxide

C: Oxygen

D: Hydrogen



Correct Option: B  [ Carbon dioxide ]

Remark:


Q: Which one of the following has the highest fuel value ?

A: Hydrogen

B: Charcoal

C: Natural gas

D: Gasoline



Correct Option: A  [ Hydrogen ]

Remark:
"Hydrogen" has the highest calorific value among commonly used fuels because it has a very high energy content, undergoes complete combustion, has a high heat of combustion, and can be used in various applications.


Q: The waves which can propagate even through the vacuum,are called __________.

A: Mechanical waves

B: Reverse waves

C: Inverted waves

D: Electromagnetic waves



Correct Option: D  [ Electromagnetic waves ]

Remark:


Q: What is the scientific name of Vitamin- C :

A: Turtaric Acid

B: Folic Acid

C: Ascorbic Acid

D: Oxalic Acid



Correct Option: C  [ Ascorbic Acid ]

Remark:


Q: The only snake that builds its nest is:

A: Krait

B: King cobra

C: Chain viper

D: Saw scaled viper



Correct Option: B  [ King cobra ]

Remark:
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