The purest form of iron is

• White cast iron
• Grey cast iron
• Wrought iron
• Steel
Correct Option: C  [ Wrought iron ]

Remark:

Insulin is used in the treatment of

• Diabetes
• Anaemia
• Night Blindness
• Goitre
Correct Option: A  [ Diabetes ]

Remark:

LASER is abbreviated form of :

• Light Absorption by Stimulated Emission of Radiation
• Light Absorption by Steady Emission of Radiation
• Light Amplification by Stimulated Emission of Radiation
• Light Amplification by Steady Emission of Radiation
Correct Option: C  [ Light Amplification by Stimulated Emission of Radiation ]

Remark:

Which one among the following is strong smelling agent used in LPG cylinder to help in the detection of gas leakage?

• Ethanol
• Thioethanolanine
• Methane
• Chloroform
Correct Option: B  [ Thioethanolanine ]

Remark:

Anaemia is caused due to deficiency of:

• Iodine
• Iron
• Vitamin
• none of these
Correct Option: B  [ Iron ]

Remark:

The longest day in the southern Hemisphere is on :

• 22nd December
• 21st June
• 21st March
• 23rd September
Correct Option: A  [ 22nd December ]

Remark:

Persistence of vision is the principle behind:

• Camera
• Binocular
• Cinema
• Periscope
Correct Option: C  [ Cinema ]

Remark:

Which of the following statements is correct ?

• Red insulated wire is called 'live' wire
• Black insulated wire is called 'neutral' wire
• Green insulated wire is called 'earthing'
• All of the above
Correct Option: D  [ All of the above ]

Remark:

Saliva helps in the digestion of:

• fats
• starch
• proteins
• vitamins
Correct Option: B  [ starch ]

Remark:

The mountaineers carry oxygen with them because:

• at an altitude of more than 5 km there is no air
• the amount of air available to a person on mountain is lesser than that available on the ground
• the temperature of air is lesser than that on the ground.
• The pressure of air is higher than that on the ground.
Correct Option: B  [ the amount of air available to a person on mountain is lesser than that available on the ground ]

Remark: