class 9 MCQ

Class = 9

Multiple Choice Questions

Question 1. The amount of issue present in an article is called its:

a) Weight

b) Gram

c) Mass

d) Density

Question 2. At higher heights:

a) Boiling purpose of a fluid declines

b) Boiling purpose of a fluid increments

c) No adjustment in breaking point

d) Melting purpose of strong increments

Question 3. The breaking point of liquor is 78oC. What is this temperature in Kelvin scale:

a) 373 K

b) 351 K

c) 375 K

d) 78 K

Question 4. In which marvels water changes into water vapor beneath its B.P.?

an) Evaporation

b) Condensation

c) Boiling

d) No such marvels exist

Question 5. The breaking point of water on Celsius and Kelvin scale individually is:

a) 373, 273

b) 0, 273

c) 273, 373

d) 100, 373

Question 6. The fluid which has the most noteworthy rate of dissipation is:

a) Petrol

b) Nail-clean remover

c) Water

d) Alcohol

Question 7. When we put a few gems of potassium permanganate in a measuring utencil containing water, we see that after at some point entire water has turned pink. This is expected to:

a) Boiling

b) Melting of potassium permanganate gems

c) Sublimation of gems

d) Diffusion

Question 8. The condition of issue which comprises of too vigorous particles as ionized gases is called:

a) Gaseous state

b) Liquid state

c) Bose-Einstein condensate

d) Plasma state

Question 9. The power that ties the particles of issue together is known as:

an) Intermolecular space

b) Bond

c) Intermolecular power

d) Nuclear power

Question 10. The difference in a fluid into vapor is called:

a) Vapourization

b) Solidification

c) Sublimation

d) None of these

Question 11. Which of the accompanying depicts the fluid stage?

an) It has an unmistakable shape and a positive volume

b) It has an unmistakable shape yet not an unequivocal volume

c) It has an unmistakable volume yet not an unequivocal shape

d) It has neither a clear shape nor a distinct volume

Question 12. At the point when a teaspoon of strong sugar is broken down in a glass of fluid water, what stage or stages are available in the wake of blending:

a) Liquid as it were

b) Still strong and fluid

c) Solid as it were

d) None of these

Question 13. Volume of a gas at a specific temperature and on barometrical weight is 200 ml. Keeping the temperature consistent on the off chance that weight is expanded to 5 air, at that point volume of the gas will be:

a) 100 ml

b) 40 ml

c) 200 ml

d) 205 ml

Question 14. Which of the accompanying articulations best clarifies why a shut inflatable loaded up with helium gas ascends in air?

a) Helium is a monatomic gas, while almost every one of the particles that make up air, for example, nitrogen and oxygen, are diatomic.

b) The normal speed of helium iotas is higher than the normal paces of air particles, and the higher speed of impacts with the inflatable dividers moves the inflatable upward.

c) Because the helium iotas are of lower mass than the normal is atoms, the helium gas is less thick than air. The inflatable along these lines weighs not exactly the air uproots by its volume.

d) Because helium has a lower molar mass than the normal air particles, the helium molecules are in quicker movement. This implies the temperature. Hot gases will in general ascent.

Question 15. Rise to volumes of all gases under comparable states of temperature and weight contain break even with quantities of particles. This announcement was made by:

a) Gay-lussae

b) Avogadro

c) Berzilius

d) John Dalton

Question 16. Boyle's law expresses that the:

a) Pressure of a gas is legitimately corresponding to the temperature at steady volume

b) Pressure of a gas is conversely corresponding the volume at steady temperature

c) Volume is legitimately corresponding to the temperature at steady weight

d) None of the abovementioned

Question 17. All gases will involve zero volume when the temperature is decreased to:

a) 2730C

b) 2730C

c) - 2730C

d) 00C

Question 18. Non-responding gases tend to blend with one another. This marvel is known as:

a) Chemical response

b) Diffusion

c) Effusion

d) Explosion

Question 19. A gas which complies with the gas laws is known as:

an) A perfect gas

b) A heavier gas

c) A lighter gas

d) A genuine gas

Question 20. A gas can be packed to a small amount of its volume. A similar volume of a gas can be spread everywhere on a room. The explanation behind this is:

a) The volume involved by atoms of a gas is unimportant when contrasted with the all out volume of the gas.

b) Gases comprises of particles which are in a condition of irregular movement

c) Gases comprises of particles having extremely huge between sub-atomic space which can be diminished or expanded under conventional conditions

d) None of these

Question 21. What is the term used to portray the stage change of a fluid to a gas?

a) Boiling

b) Condensation

c) Melting

d) None of the abovementioned

Question 22. What term is utilized to depict the stage change of a strong to a fluid?

a) Freezing

b) Melting

c) Boiling

d) None of the abovementioned

Question 23. What s the term used to portray the stage change as a fluid turns into a strong?

an) Evaporation

b) Condensation

c) Freezing

d) None of the abovementioned

Question 24. Which has the least enthusiastic particles?

a) Solids

b) Liquids

c) Gases

d) Plasmas

Question 25. In which period of issue would you anticipate compound (liquor exists) at room temperature?

a) Solid

b) Liquid

c) Gas

d) Plasma

Question 26.. Which of these decisions won't change the condition of issue?

a) Temperature

b) Crushing a precious stone

c) Pressure

d) Heat

Question 27. On the off chance that you leave water in a glass and a few particles transform into a gas, it is called:

a) Condensation

b) Evaporation

c) Extinction

d) Solidification

Question 28. As of the 1990s, researchers have demonstrated the presence of what number of conditions of issue?

a) Two

b) Three

c) Four

d) Five

Question 29. Out of the accompanying which is the densest condition of issue?

a) Solids

b) Liquids

c) Gases

d) Plasmas

Question 30. Densities of two gases are in the proportion 1: 2 and their temperatures are in the proportion 2 : 1, at that point the proportion of their particular weight is:

a) 1 : 1

b) 1 : 2

c) 2 : 1

d) 4 : 1

Question 31. Which of the accompanying articulation at steady weight speaks to Charle's law?

a) VT=constant

b)PV=constant

c) V/T =constant

d) None of the abovementioned

Question 32. For a perfect gas number of moles per liter as far as its weight P, gas consistent R and temperature T is:

a) PT/R

b) PRT

c) P/RT

d) RT/P

Question 33. Rate of dissemination of a gas is:

a) Directly relative to its thickness

b) Directly relative to its atomic mass

c) Inversely relative to the square base of its thickness

d) Inversely corresponding to the square base of its sub-atomic mass

Question 34. As per Graham' law at a given temperature, the proportion of the rates of dispersion rA/rBof gases An and B is given by:

a) (PA/PB) (MA/MB )1/2

b) (MA/MB) (PA/PB)1/2

c) (PB/MB) (PA/MA)1/2

d) (MA/MB)) ( PB/PA)1/2

Question 35. A container of alkali and a jug of dry hydrogen chloride associated through a long cylinder are opened at the same time at the two finishes, the while ammonium chloride ring initially shaped will be:

an) At the focal point of the cylinder

b) Near the hydrogen chloride bottle

c) Near the smelling salts bottle

d) Throughout the length of the cylinder

Question 36. Select the one that is anything but an issue:

a) Feeling of hot

b) Smoke

c) Humidity

d) Water

Question 37. Which is mistaken explanation:

a) Matter is constant in nature.

b) Of the three condition of issue, the one that is most smaller is strong state.

c) In strong state interparticles space (i.e., void space) is least.

d) The thickness of strong is commonly more than that of a fluid.

Question 38. Select the one that when utilized would be considered as best condition for liquification of a gas:

an) Increasing the temperature

b) Decreasing the weight

c) Increasing the weight and diminishing the temperature

d) Decreasing the weight and expanding the temperature.

Question 39. Select the right request of dissipation for water, liquor, petroleum and lamp oil:

a) Water > liquor > lamp oil > petroleum

b) Alcohol > petroleum > water > lamp oil

c) Petrol > liquor > water > lamp oil

d) Petrol > liquor > lamp oil > water

Question 40. Which one is a magnificent substance?

a) Table salt

b) Sugar

c) Iodine

d) Potassium iodide

Question 41.. S. I. unit of temperature is:

a) Celsius

b) Fahrenheit

c) Kelvin

d) None of these

Question 42. 100 K is equivalent to:

a) 1830C

b) - 1730C

c) 1730C

d) - 2730C

Question 43. The procedure of progress of fluid state into vaporous state at consistent temperature is known as:

a) Boiling

b) Melting

c) Fuson

d) Evaporation

Question 44. What is Dry Ice?

an) Ice having no water of cry stallisation

b) Ice that has been dried

c) Solid carbon dioxide

d) None of these

Question 45. Which one is a surface marvel?

an) Evaporation

b) Boiling

c) Both (an) and (b)

d) None of these

Question 46. Rate of dissemination relies on:

a) Temperature

b) Surface territory

c) Both temperature and surface territory

d) None of these

Question 47. Which of the accompanying procedures is known as combination?

a) Change of fluid to strong

b) Change of strong to fluid

c) Change of fluid to vapor

d) Change of vaporous state to strong state

Question 48. The vanishing of a fluid can best be done in a:

a) Flask

b) China dish

c) Test tube

d) Beaker

Question 49. The one, in which interparticle powers are most grounded, is:

a) Sodium chloride

b) Hydrogen

c) Ether

d) Carbon dioxide

Question 50. The dissolving point temperature of the strong condition of a substance is 400oC. The point of solidification temperature of the fluid condition of a similar substance will be:

a) 350C

b) 400C

c) 450C

d) Can't foresee

Question 51. Which one will quicken the procedure of vanishing of a fluid kept in an open china dish?

a) Keeping dish in open

b) Blowing air into the fluid

c) Keeping the dish under a running fan

d) All the abovementioned