The latest discovered state of matter is
A. solid
B. Bose-Einstein condensate
C. plasma
D. liquid
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Which law was formulated in 1662 and concluded that the product of pressure and volume remains almost constant?
A. Avogadro's law
B. Dalton's law
C. Boyle's law
D. Charles' law
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Bose-Einstein condensate is a
A. solid state of matter
B. fifth state of matter
C. plasma
D. state of condensed matter
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. . . . . . . . is the measure of relative clarity of a liquid.
A. Turbidity
B. Conductivity
C. Composting
D. Reduction
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Matter around us can exist in three different states, namely, solid, liquid and gas. The correct order of their compressibility is
A. Liquid < Gas < Solid
B. Solid < Liquid < Gas
C. Gas < Liquid < Solid
D. Solid< Gas < Liquid
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Consider the following statements about mixture?
1. A substance can be separated into other kinds of matter by any physical process.
2. Dissolved sodium chloride can be separated from water by the physical process of evaporation.
Which of the statements given above is/are correct?
A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
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A molecule of a substance is similar to its atom for
A. diatomic molecule
B. polyatomic molecule
C. monoatomic molecule
D. triatomic molecule
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Which one of the following is monoatomic?
A. Hydrogen
B. Sulphur
C. Phosphorus
D. Helium
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Sodium vapour lamps glow with yellow colour. This is due to
A. sublimation of sodium to emit yellow colour
B. the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum
C. the low ionisation energy of sodium
D. its ability to absorb all other colours except yellow
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Which one of the following is not a monoatomic element?
A. Copper
B. Helium
C. lodine
D. Barium
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Following properties will decrease with increase in temperature except?
A. Surface
B. Vviscosity
C. Density
D. Vapour pressure
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A mixture of water and alcohol can be separated by
A. filtration
B. evaporation
C. decantation
D. distillation
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The absolute zero, i.e. temperature below which is not achievable, is about
A. 0°C
B. -273K
C. -273°C
D. -300°C
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A student by chance mixed acetone with alcohol. The mixture of acetone and alcohol can be separated by
A. filtration
B. separating funnel
C. fractional crystallisation
D. fractional distillation
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Why do two ice blocks join to form one block when pressed together?
A. Melting point of ice is lowered with increase in pressure
B. Melting point of ice increases with increase in pressure
C. Melting point of ice remains unchanged with increase in pressure
D. Melting point of ice is 0°C
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The proposition 'equal volumes of different gases contain equal numbers of molecules at the same temperature and pressure' is known as
A. Avogadro's hypothesis
B. Gay-Lussac's hypothesis
C. Planck's hypothesis
D. Kirchhoff's hypothesis
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Unit of viscosity is
A. poise
B. dyne/cm
C. joule/m2
D. joule
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In general equation pV = nRT, V is the volume of
A. nmole of a gas
B. any amount of gas
C. one mole of a gas
D. one gram of a gas
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Assertion (A) All molecules of an ideal gas move with the same speed.
Reason (R) There is no attraction between the molecules is in ideal gas.
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true, but R is not the correct explanation of A
C. A is true, but R is false
D. A is false, but R is true
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Which of the following has the lowest melting point?
A. Lead
B. Zinc
C. Silver
D. Tin
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