Which of the following is not an element ?

• Oxygen
• Nitrogen
• Hydrogen
• Marble
Correct Option: D  [ Marble ]

Remark:

Which one of the following is not an electromagnetic wave?

• Radio wave
• X-ray
• Visible light
• Sound wave
Correct Option: D  [ Sound wave ]

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:

Dehydration in human body is caused due to the loss of

• salts
• water
• hormones
• vitamins
Correct Option: B  [ water ]

Remark:

Sound waves in air are

• Transverse
• Longitudinal
• Electromagnetic
• Polarized
Correct Option: B  [ Longitudinal ]

Remark:

Which of the following contains maximum carbon dioxide ?

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

Remark:

Which of the following statements is not true about Bt cotton ?

• Bt cotton has increased profit margin of farmers
• Use of insecticides has reduced significantly
• Seeds of Bt cotton are cheaper than non-GM seeds
• Since the use of Bt cotton India's cotton export has doubled.
Correct Option: C  [ Seeds of Bt cotton are cheaper than non-GM seeds ]

Remark:

A network of computers and other peripherals that is confined to a relatively small space is call:

• Local Area Network
• Wide Area Network
• Global Network
• Intranet
Correct Option: A  [ Local Area Network ]

Remark:

Down syndrome is a/an

• Infectious disease
• Genetic disease
• Epidemic disease
• Mutated disease
Correct Option: B  [ Genetic disease ]

Remark: A genetic condition caused by having an extra chromosome 21 in some or all of the body's cells.

The Kala-azar disease in man is spread by the bite of a:

• Culex Mosquito
• Phlebotomus sandfly
• Climex bed-bug
• Sarcoptes mites
Correct Option: B  [ Phlebotomus sandfly ]

Remark: