When iron rusts, its weight __________

• decreases
• increases
• remains the same
• first increases and then decreases
Correct Option: B  [ increases ]

Remark:

Which one of the following is called the 'power house' of the cell ?

• Golgi body
• Mitochondrion
• Ribosome
• Lysosome
Correct Option: B  [ Mitochondrion ]

Remark:

Electric appliances have star rating ( upto 5 stars) on them. More the number of stars :

1. longer is the life span of the appliance
2. more stringent is the quality checks
3. Higher is the energy efficiency of the appliance

Which of the above is / are correct ?

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

Remark:

Which of the following branch deals with the various principles that govern the relationship between organisms and their environment?

• Histology
• Ecology
• Entomology
• Anthropology
Correct Option: B  [ Ecology ]

Remark:

Which of the following is not a nucleon?

• proton
• neutron
• electron
• positron
Correct Option: D  [ positron ]

Remark:

Kidney disease in man is caused by the pollutant

• Cadmium
• Iron
• Cobalt
• Carbon
Correct Option: A  [ Cadmium ]

Remark:

Which of the following is not a property of heavy water ?

• Boiling point of heavy water is lower than that of ordinary water
• density of heavy water is higher than that of ordinary water
• freezing point of heavy water is higher than that ordinary water
• it produces corrosion
Correct Option: A  [ Boiling point of heavy water is lower than that of ordinary water ]

Remark:

Lack of Vitamin A may cause

• Poor night vision
• Rickets
• Beri Beri
• None of these
Correct Option: A  [ Poor night vision ]

Remark:

The digested food is absorbed in

• Stomach
• Intestine (small)
• Intestine (large)
• Colon
Correct Option: B  [ Intestine (small) ]

Remark:

The gas which destroys ozone layer is:

• Oxygen
• Argon
• Chloroflurocarbon
• Hydrogen
Correct Option: C  [ Chloroflurocarbon ]

Remark: