Sound travels fastest in

• Vacuum
• Steel
• Water
• Air
Correct Option: B  [ Steel ]

Remark:

What is the name of first Indian Artificial satellite?

• Apollo
• Rohini
• Bhaskara
• Aryabhatta
Correct Option: D  [ Aryabhatta ]

Remark: launched by the Soviet Union on 19 April 1975 and built by the Indian Space Research Organisation (ISRO)

The pH of human blood is:

• 7.2
• 7.8
• 6.6
• 7.4
Correct Option: D  [ 7.4 ]

Remark:

Full form of "GPS" is

• Geographic Pointing System
• Global Positioning System
• Geographic Photo Sensor
• Global Polar Synchronization
Correct Option: B  [ Global Positioning System ]

Remark:

One kilometre is equal to how many miles?

• 0.84
• 0.5
• 1.6
• 0.62
Correct Option: D  [ 0.62 ]

Remark:

The purest form of iron is

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

Remark:

Which of the following contains maximum carbon dioxide ?

• Grasslands
• Forests
• Oceans
• Agroecosystems
Correct Option: C  [ Oceans ]

Remark:

Which of the following is not a property of heavy water ?

• Boiling point of heavy water is lower than that of ordinary water
• density of heavy water is higher than that of ordinary water
• freezing point of heavy water is higher than that ordinary water
• it produces corrosion
Correct Option: A  [ Boiling point of heavy water is lower than that of ordinary water ]

Remark:

What is 'Agent Orange' ?

• An insecticide
• A herbicide
• A fertiliser
• A biofertiliser
Correct Option: B  [ A herbicide ]

Remark:

The digested food is absorbed in

• Stomach
• Intestine (small)
• Intestine (large)
• Colon
Correct Option: B  [ Intestine (small) ]

Remark: