light, heat, thermodynamics, wave motion, sound, optics & oscillations - Category wise Question and Answer Practice Test with Solutions
light, heat, thermodynamics, wave motion, sound, optics & oscillations PRACTICE TEST [16 - EXERCISES]
set 1
set 2
set 3
set 4
set 5
set 6
set 7
set 8
set 9
set 10
set 11
set 12
set 13
set 14
set 15
set 16
Question : 16
Consider the following statements :
- Some bodies may contract on heating.
- Water shows anomalous expansion.
a) 1 and 2 both
b) 2 only
c) 1 only
d) None
Answer »Answer: (a)
Some bodies like wood, rubber etc. have negative value of coefficient of thermal expansion, hence they contract on heating.
Hence 1 is true. 2 is also true.
Question : 17
Consider the following statements :
- The shock waves produced by a supersonic aircraft do not have much intensity.
- The speed of sound is maximum in solids.
- A bat emits ultrasonic waves.
- Sound waves of frequency below audible range are termed as ultrasonic.
a) 2 and 3
b) 1, 2 and 3
c) 1, 3, and 4
d) 1 and 4
Answer »Answer: (a)
A shock wave is a type of propagating disturbance. Like an ordinary wave, it carries energy and can propagate through a medium (solid, liquid, gas or plasma) or in some cases in the absence of a material medium. Across a shock wave there is always an extremely rapid rise in pressure, temperature and density of the flow.
Ultrasound is sound with a frequency greater than the upper limit of human hearing (greater than 20 kHz).
Question : 19
Consider the following three statements
- Heating 1 kg of water from 10°C to 50°C
- Melting 600 g of ice at 0°C
- Converting 300 g of ice at 0°C to water at 50°C
a) 2, 1, 3
b) 1, 2, 3
c) 3, 2, 1
d) 3, 1, 2
Answer »Answer: (d)
Question : 20 [UP (Spl)(Pre) 2008]
The cloudy nights are warmer than clear nights because
a) Clouds absorb Sunlight during the day and radiate the same in night
b) Clouds make the atmosphere damp and generate heat
c) The clouds prevent radiation of heat from the ground and the air
d) The clouds obstruct the movement of air which creates heat
Answer »Answer: (c)
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set 6 Online Quiz
Click to Start..general science mcq CATEGORIES
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» Measurement And SI Units
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» Measuring Devices And Scales
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» Mechanics (Mass, Force, Acceleration, Work, Energy, Momentum, Velocity)
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» Force Of Gravity, Solids And Fluids
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» Motion Under Gravity
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» Physical Properties Of Materials
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» Light, Heat, Thermodynamics, Wave Motion, Sound, Optics & Oscillations
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» Electric Current And Magnetism
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» Nuclear Physics And Conductivity
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» Modern And Space Physics, Sources Of Energy
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» General Concepts Of Chemistry
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» Nature Of Matter And Composition
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» Atomic Structure Molecules And Nuclear Chemistry
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» Classification Of Elements, Chemical Bonding, Periodicity In Properties & Physical Transformation
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» Metals, Non Metals, Minerals, Ores, Properties, Uses
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» Alloys, Carbon & Its Various Forms, Hydrogen & Compounds, Sulphur, Nitrogen, Halogen & Inert Gases
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» Acids, Bases, Salts And Metals
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» Hydrocarbon, Alcohol, Polymer, Organic Acid And Explosive Substance
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» Fuel, Food Preservation, Nutrition, Medicine, Detergents And Fertilizers
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» Inorganic Chemistry
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» Organic Chemistry
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» Environmental Chemistry
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» Some Important Man Made Materials
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» Sub Divisions Of Biology
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» Genetics, Evolution Of Life & Ecological Biodiversity
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» Taxonomy
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» Heredity
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» Biofertilizer
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» Biological Classification Cell Tissues And Division
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» Human Anatomy
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» Blood Transport System
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» Digestion And Excretion
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» Photosynthesis
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» Vitamins, Nutrition, Health, Disease And Treatment
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» Endocrine Glands, Hormones
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» Physiology Of Plants, Humans And Animals
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» Reproduction
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» Genetic Engineering And Bio Technology
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