The longest cell in animals is

• Nerve cell
• Hepatocyte (Liver cell)
• Blood cell
• Muscle cell
Correct Option: A  [ Nerve cell ]

Remark:

The art and science of map making is called:

• remote sensing
• cartography
• photogrammetry
• mapping
Correct Option: B  [ cartography ]

Remark:

The function of ball bearing in a wheel is:

• to increase friction
• to convert kinetic friction into rolling friction
• to convert static friction into kinetic friction
• just for convenience
Correct Option: B  [ to convert kinetic friction into rolling friction ]

Remark:

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:

Which of the following is not a property of acids ?

• All acids have sour taste
• All acids are corrosive in nature
• For acidic solutions pH = <7
• Acids turn red litmus to blue
Correct Option: D  [ Acids turn red litmus to blue ]

Remark:

Onion is a modified form of

• leaf
• stem
• root
• None of these
Correct Option: B  [ stem ]

Remark:

Cerebral Malaria is caused by:

• Plasmodium vivax
• Plasmodium malariae
• Plasmodium falciparum
• None of the above
Correct Option: C  [ Plasmodium falciparum ]

Remark:

Which of the following adds/add carbon dioxide to the carbon cycle on the planet earth ?
1. Volcanic action
2. Respiration
3. Photosynthesis
4. Decay of organic matter
(Select correct answer)

• 1, 2 and 4 only
• 1 and 3 only
• 2 only
• 1, 2 and 3 only
Correct Option: A  [ 1, 2 and 4 only ]

Remark:

Vinegar is chemically a:

• diluted citric acid
• diluted acetic acid
• diluted hydrochloric acid
• diluted oxalic aid
Correct Option: B  [ diluted acetic acid ]

Remark:

Which of the following compounds is used in fire extinguishers ?

• Sodium carbonate
• Sodium bicarbonate
• Sodium nitrate
• Sodium sulphate
Correct Option: B  [ Sodium bicarbonate ]

Remark: