Which of the following will not cause any atmospheric pollution ?

• Hydrogen
• Sulphur dioxide
• Carbon dioxide
• Carbon monoxide

Heavy water is :

• Ice
• Water at 4 degree Celsius
• Deuterium oxide
• Solution of sugar and water

Which of the following diseases is caused by virus ?

• Cholera
• Typhoid
• Tuberculosis
• Small Pox

Which of the following elements is essential for the transmission of nerve impulses in nerve fibers of human body ?

• Calcium
• Iron
• Sodium
• Zinc

All enzymes are actually

• Protein
• Carbohydrates
• Fatty acids
• Steroids

The largest gland of human body is :

• Thyroid
• Kidney
• Pancreas
• Liver

Growth hormone is produced by :

• Bones
• Pituitary gland
• Thyroid gland
• Adrenal gland

Bronchitis is a disease of :

• Blood
• Liver
• Intenstine
• Respiratory track

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

Which of the following is an operating system ?

• Floppy
• Windows Xp
• Oracle
• ROM