Class 9th Science Chapter -1 Matter in Our Surroundings
| Textbook | NCERT |
| Class | 9th |
| Subject | Science |
| Chapter | 1st |
| Chapter Name | Matter in Our Surroundings |
| Category | Class 9th Science |
| Medium | English |
| Source | Last Doubt |
| Class 9th Science Chapter – 1 Matter in Our Surroundings MCQ with answer In this Chapter We Will read about Matter in Our Surroundings, States of Matter, Solid, Liquid, Gas, Matter, Effect of temperature, Melting point, Boiling point, Latent heat of fusion, Latent heat of vaporization, Freezing, Condensation, Evaporation, Sublimation, Factors affecting evaporation and More much. you have provided easy notes which use in your study make progress in education. |
Class 9th Science Chapter 1 Matter in Our Surrounding
Chapter – 1
Matter in Our Surrounding
MCQ
| (1) Seema visited a Natural Gas Compressing unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions. A. Low temperature, low pressure B. High temperature, low pressure C. Low temperature, high pressure D. High temperature, high pressure Answer – (C) Low temperature, high pressure |
| (2) Which of the following phenomena would increase on raising the temperature? A. Diffusion, evaporation, compression of gases B. Evaporation, compression of gases, solubility C. Evaporation, diffusion, expansion of gases D. Evaporation, solubility, diffusion, compression of gases Answer – (C) Evaporation, diffusion, expansion of gases |
| (3) A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement? A. Water, air, wind B. Air, sugar, oil C. Oxygen, water, sugar D. Salt, juice, air Answer – (C) Oxygen, water, sugar |
| (4) On converting 25°C, 38°C and 66°C to Kevlin scale, the correct sequence of temperature will be A. 298 K, 311 K and 339 K B. 298 K, 300 K and 338 K C. 273 K, 278 K and 543 K D. 298 K, 310 K and 338 K Answer – (A) 298 K, 311 K and 339 K |
| (5) Which condition out of the following will increase the evaporation of water? A. Increase in temperature of water B. Decrease in temperature of water C. Less exposed surface area of water D. Adding common salt to water Answer – (A) Increase in temperature of water |
| (6) Choose the correct statement from the following: A. Conversion of solid into vapour without passing through the liquid state is called vapourisation. B. Conversion of vapour into solid without passing through the liquid state is called sublimation. C. Conversion of vapour into solid without passing through the liquid state is called freezing. D. Conversion of solid into liquid is called sublimation. Answer – (B) Conversion of vapour into solid without passing through the liquid state is called sublimation. |
| (7) The property of flow is unique to fluids. Which one of the following statements is correct? A. Only gases behave like fluids B. Gases and solids behave like fluids C. Gases and liquids behave like fluids D. Only liquids are fluids Answer – (C) Gases and liquids behave like fluids |
| (8) During summer, water kept in an earthen pot becomes cool because of the phenomenon of A. Diffusion B. Transpiration C. Osmosis D. Evaporation Answer – (D) evaporation |
| (9) The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale? A. 306 K, 329 K and 391 K B. 308 K, 329 K and 392 K C. 308 K, 329 K and 391 K D. 329 K, 392 K and 308 K Answer – (C) 308 K, 329 K and 391 K |
| (10) In which of the following conditions, the distance between the molecules of hydrogen gas would increase? (i) Increasing pressure on hydrogen contained in a closed container (ii) Some hydrogen gas leaking out of the container (iii) Increasing the volume of the container of hydrogen gas (iv) Adding more hydrogen gas to the container without increasing the volume of the container A. (i) and (iii) B. (i) and (iv) C. (ii) and (iii) D. (ii) and (iv) Answer – (C) (ii) and (iii) |
| (11) The boiling point of water at sea level is A. 0°C B. 273 K C. 373 K D. 273°C Answer – (C) 373 K |
| (12) Dry ice is A. water in solid state B. water in gaseous state C. CO2 in liquid state D. CO2 in solid state Answer – (D) CO2 in solid state |
| (13) Which of the following conditions is most favourable for converting a gas into a liquid? A. High pressure, low temperature B. Low pressure, low temperature C. Low pressure, high temperature D. High pressure, high temperature Answer – (A) High pressure, low temperature |
| (14) Which of the following has the strongest interparticle forces at room temperature? A. Oxygen B. Water C. Bromine D. Iron Answer – (D) Iron |
| (15) Which of the following phenomena would increase on raising the temperature? A. Diffusion, evaporation, compression of gases B. Evaporation, compression of gases, solubility C. Evaporation, diffusion, expansion of gases D. Evaporation, solubility, diffusion, compression of gases Answer – (C) Evaporation, diffusion, expansion of gases |
| (16) Seema visited a Natural Gas Compressing unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions? A. Low temperature, low pressure B. High temperature, low pressure C. Low temperature, high pressure D. High temperature, high pressure Answer – (C) Low temperature, high pressure |
| (17) The property of flow is unique to fluids. Which one of the following statements is correct? (a) Only gases behave like fluids (b) Gases and solids behave like fluids (c) Gases and liquids behave like fluids (d) Only liquids are fluids Answer – (C) Gases and liquids behave like fluids |
| (18) During summer, water kept in an earthen pot becomes cool because of the phenomenon of? A. diffusion B. transpiration C. osmosis D. evaporation Answer – (D) evaporation |
| (19) A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement? A. Water, air, wind B. Air, sugar, oil C. Oxygen, water, sugar D. Salt, juice, air Answer – (C) Oxygen, water, sugar |
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