Science Basic

Q.1. Sound above what level(in decibel) is considered hazardous noise pollution
A. 30 dB
B. 40 dB
C 60 dB
D. 80 dB
Ans. 80 dB

Q.2. Which one of the following metals occurs in free state?
A. Gold
B. Sodium
C. Aluminium
D. Copper
Ans. Gold

Q.3. Blue baby syndrome is because of
A. Nitrate
B. Phosphate
C. Sulphate
D. Carbonate
Ans. Nitrate

Q.4. A characteristic odour of garlic is due to
A. A chloro compound
B. A sulphur compound
C. Acetic acid
D. None
Ans. A sulphur compound

Q.5. Non stick cooking utensils are coated with
A. Teflon
B. PVC
C. Blank paint
D. Polystyrene
Ans. Teflon

Q.6. If a body is hollow, then its centre of gravity lies
A. Inside the material of the body
B. Outside the material of the body
C. In the left end of the body
D. In the right end of the body
Ans. Outside the material of the body

Q.7. Which of the following fibres is considered as the strongest natural fibre
A. Cotton
B. Jute
C. Wool
D. Silk
Ans. Silk

Q.8. Which mosquito is the carrier of Zika virus
A. Culex
B. Aedes
C. Anopheles
D. Culiseta
Ans. Aedes

Q.9. Which instrument is used for photographing the sun
A. Galvanometer
B. Potentiometer
C. Spectrophotometer
D. Spectroheligraph
Ans. Spectroheliograph

Q.10. 'Cryogenics' is a science dealing with
A. High temperature
B. Low temperature
C. Growth of crystals
D. None
Ans. Low temperature.

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