The colour of sky without atmosphere will be :

• Black
• White
• Blue
• Green
Correct Option: A  [ Black ]

Remark:

Which of the following is/are not associated with the reduction of Greenhouse gases ?
i) Kigali Amendment to Montreal Protocol
ii) Stockholm convention
iii) Kyoto Protocol

• (ii) only
• (i) and (ii) only
• (i) and (iii) only
• (i), (ii) and (iii)
Correct Option: A  [ (ii) only ]

Remark:

The phenomenon of radioactivity was discovered by:

• Marie Curie
• Pierre Curie
• Henri Becquerel
• J J Thomson
Correct Option: C  [ Henri Becquerel ]

Remark:

The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organism is:

• 4-6
• 2-4
• 8-10
• 12-16
Correct Option: A  [ 4-6 ]

Remark:

Malaria is caused by

• parasitic infection
• viral infection
• bacterial infection
• fungal infection
Correct Option: A  [ parasitic infection ]

Remark:

In plants, extra-chromosomal DNA is found in

• Nucleus
• Chloroplast
• Ribosome
• Golgi bodies
Correct Option: B  [ Chloroplast ]

Remark: In many cases, extrachromosomal DNA is contained in cytoplasmic organelles, such as mitochondria (animals), and in chloroplasts and plastids (plants).

Which of the following copper alloys is used for the manufacture of springs and suspension filaments in electrical instruments?

• Bronze
• Aluminium bronze
• German silver
• Phosphor bronze
Correct Option: D  [ Phosphor bronze ]

Remark:

All enzymes are actually

• Protein
• Carbohydrates
• Fatty acids
• Steroids
Correct Option: A  [ Protein ]

Remark:

Sphygmomanometer is an instrument used for measuring

• Heart beat
• Vision of eyes
• Blood Sugar
• Blood Pressure
Correct Option: D  [ Blood Pressure ]

Remark:

PINAKA often seen in news, is a / an:

• Anti-submarine torpedo and research vehicle
• Aircraft carrier
• Multi barrel Rocket Launch (MBRL) system
• Guided missile frigate submarine warship
Correct Option: C  [ Multi barrel Rocket Launch (MBRL) system ]

Remark: