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:

Opium is derived from which part of poppy plant ?

• Seeds
• Leaves
• Bark
• Capsule
Correct Option: D  [ Capsule ]

Remark:

Noise levels in residential areas should not exceed:

• 30 decibels
• 100 decibels
• 85 decibels
• 55 decibels
Correct Option: D  [ 55 decibels ]

Remark:

Rainbow is formed due to a combination of:

• refraction and absorption
• dispersion and diffraction
• refraction and scattering
• dispersion and total internal re?ection
Correct Option: D  [ dispersion and total internal re?ection ]

Remark:

Which of the following statements is not correct ?

• Rh⁺ person can donate blood to Rh⁺ person
• Rh^- person can donate blood to Rh^- person
• Rh^- person can donate blood to Rh⁺ person
• Rh⁺ person can donate blood to Rh^- person
Correct Option: D  [ Rh⁺ person can donate blood to Rh^- person ]

Remark:

Which of the following animals is carnivorous?

• Elephant
• Horse
• Rhinoceros
• Tiger
Correct Option: D  [ Tiger ]

Remark:

What does the airbag, used for safety of car driver, contain?

• Sodium bicarbonate
• Sodium azide
• Sodium nitrite
• Sodium peroxide
Correct Option: B  [ Sodium azide ]

Remark:

Which of the following cells produce immune response in human body ?

• Red blood cells
• White blood cells
• Epithelical cells
• Adipose cells
Correct Option: B  [ White blood cells ]

Remark:

The Kyoto Protocol is associated with :

• Environment
• Nuclear Power
• Trade
• none of these
Correct Option: A  [ Environment ]

Remark:

Malaria is transmitted from one person to another by:

• Aedes Mosquito
• Culex Mosquito
• Anopheles Mosquito
• All of the above
Correct Option: C  [ Anopheles Mosquito ]

Remark: