Q. Eclipses occur due to which optical phenomena?
1) Reflection
2) Refraction
3) Rectilinear propagation
4) Diffraction
Q. Which of the following produces highest amount of energy upon oxidation?
1) Glucose
2) Far
3) An alkane
4) Protein
Q. Pure water is bad conductor of electricity because it is
1) not volatile
2) feebly ionized
3) a non-polar solvent
4) a very good solvent
Q. Where is National Chemical Laboratory (NCL) located?
1) Bhavnagar
2) Chandigarh
3) Panaji
4) Pune
Q. The metals commonly used for electroplating are
1) Gold, Sodium & Chromium
2) Chromium, Copper & Nickel
3) Nickel, Lead & Chromium
4) Gold, Sodium & Potassium
Q. Which of the following in automobile exhaust can cause cancer?
1) Carbon monoxide
2) Oxides of nitrogen
3) Polyclinic hydrocarbons
4) Lead
Q. Bleaching powder is used in drinking water as a/an
1) antibiotic
2) disinfectant
3) antiseptic
4) coagulant
Q. Gamma rays have greatest similarity with
1) a-rays
2) b-rays
3) X-rays
4) U.V.rays
Q. where are programs and data to be used by the computer available?
1) Output
2) Processing unit
3) Input
4) Storage
Q. Who invented chloroform as anaesthetic?
1) Edward Jenner
2) James Simpson
3) Alexander Fleming
4) Christian Barnard
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