Which gas in its solid state is also known as dry ice?

• Nitrogen
• Carbon dioxide
• Oxygen
• Hydrogen
Correct Option: B  [ Carbon dioxide ]

Remark:

"Zoonosis" refers to any disease or infection that is naturally transmissible from:
(i) human to human
(ii) animal to human
(iii) animal to animals
(iv) bird to animal
Select the correct answer using the codes given below.

• Only (i) and (iii)
• Both (i) and (ii)
• Both (iii) and (iv)
• Only (ii)
Correct Option: D  [ Only (ii) ]

Remark: A zoonosis is an infectious disease that has jumped from a non-human animal to humans.

Brass gets discoloured in air due to constant exposure in presence of:

• Aluminium sulphide
• Aluminium phosphide
• Hydrogen sulphide
• Hydrogenated wafers
Correct Option: C  [ Hydrogen sulphide ]

Remark:

Red blood corpuscles are formed in:

• Heart
• Bone marrow
• Liver
• Kidney
Correct Option: B  [ Bone marrow ]

Remark:

Compound microscope has

• two lenses
• requires UV light source
• used to view only dead organisms
• requires large room space
Correct Option: A  [ two lenses ]

Remark:

Anaemia is caused due to deficiency of:

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

Remark:

The pigment which is responsible for blood clotting is:

• Fibrinogen
• Haemoglobin
• Glucose
• Blood Cells
Correct Option: A  [ Fibrinogen ]

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 among the following is present in refrigerator?

• Carbon dioxide
• Methane
• Helium
• Chlorotluorocarbon
Correct Option: D  [ Chlorotluorocarbon ]

Remark: Chlorotluorocarbons (CFCs) have recently been phased out and newer refrigerators will not contain CFCs. The use of CFCs was phased out by 2000 under the Montreal Protocol.

In your opinion which of the following is due to ozone hole ?

• Increased UV radiation
• Acid rain
• Global warming
• Greenhouse effect
Correct Option: A  [ Increased UV radiation ]

Remark: