Question: A GM counter is used for detecting –
1. Underground oil
2. Coal
3. Radioactivity
4. Mehane gas
Answer: 3
Question: Which of the following statements in Not correct regarding the Ultra-violet rays?
1. It is a class of electromagnetic waves of various wavelengths ranging from 200 nm – 520 nm.
2. It has more energy than the visible part of the solar spectrum.
3. Ultra-Violet Rays are mainly classified in three spectral regions UV-A, UV-B and UV-C.
4. The biological effects of Ultraviolet Rays vary enormously with changes in the wavelength of the radiation
Answer: 1
Question: The filament of an electrical bulb is made out of –
1. Copper
2. Aluminium
3. Tungsten
4. Alloy
Answer: 3
Question: The rise of Kerosene oil in wicks of lamps is due to which property of liquids?
1. Capillary action
2. Viscosity
3. Elasticity
4. Flotation
Answer: 1
Question: Conversion of chemical energy into electrical energy occurs in
1. Dynamos
2. Electric heaters
3. Battery
4. Atomic bombs
Answer: 3
Question: Decibel is the unit used for
1. Speed of light
2. Intensity of heat
3. Intensity of sound
4. Radio wave frequency
Answer: 3
Question: Which of following laws validates the statement that matter can neither be created nor destroyed?
1. Law of Conservation of Energy
2. Le Chatelier’s Principle
3. Law of Conservation of Mass
4. Law of Osmosis
Answer: 3
Question: Lamberts law is related to
1. Reflection
2. Refraction
3. Interference
4. Illumination
Answer: 4
Question: A microwave oven uses –
1. infrared rays
2. ultraviolet rays
3. radio waves of very short wavelengths
4. radio waves of long wavelengths
Answer: 3
Question: The sky appears blue due to –
1. Refraction
2. Reflection
3. Scattering
4. Dispersion
Answer: 3
Question: The three primary colours are –
1. Green, Yellow, Red
2. Blue, Yellow, Red
3. Blue, Red, Green
4. Blue, Yellow, Green
Answer: 3
Question: Which colour is in the centre of Rainbow?
1. Red
2. Yellow
3. Green
4. Violet
Answer: 3
Question: Who gave the first evidence of the Big-Bang theory?
1. Edwin Hubble
2. Albert Einstein
3. S. Chandrasekhar
4. Stephen Hawking
Answer: 1
Question: Dry ice is
1. Solid ice without water
2. Benzoic acid
3. Glacial acetic acid
4. Solid carbon dioxide
Answer: 4