Gamma rays can cause:
- (A) Gene mutation
- (B) Fever
- (C) Sneezing
- (D) Burning
- (A) Gene mutation
The ‘escape velocity’ is needed to leave the earth (approximately) is:
- (A) 10,000 km/h
- (B) 20,000 km/h
- (C) 30,000 km/h
- (D) 40,000 km/h
- (D) 40,000 km/h
The most abundant organic molecules in living organisms are:
- (A) Lipids
- (B) Proteins
- (C) Sugars
- (D) Starches
- (B) Proteins
Argon laser is used for operating the:
- (A) Kidney stone
- (B) Eye cancer
- (C) Glaucoma
- (D) Bone disease
- (C) Glaucoma
In an earthen pot cooling of water depends on:
- (A) Atmospheric humidity
- (B) Wind
- (C) Outside temperature
- (D) All of the above
- (D) All of the above
On passing through food stuff, x-ray can kill:
- (A) Fungus
- (B) Virus
- (C) Bacteria
- (D) Insects
- (C) Bacteria
For making laser, usually, we use:
- (A) Iron
- (B) Ruby
- (C) Uranium
- (D) Magnesium
- (B) Ruby
Which of the following statements regarding rusting of iron is correct?
- (A) During rusting iron gains weight
- (B) During rusting iron losses weight
- (C) During rusting iron is volatized
- (D) During rusting iron weight remains unchanged
- (A) During rusting iron gains weight
Harmful bacteria are removed from water by passing:
- (A) Oxygen
- (B) Nitrogen
- (C) Chlorine
- (D) Carbon dioxide
- (C) Chlorine
Which of the following metals is the costliest in the world?
- (A) Iridium
- (B) Gold
- (C) Platinum
- (D) Titanium
- (C) Platinum
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