Class 9 Exam > Class 9 Notes > MCQ with Solution : Matter in Our Surroundings
MCQ with Solution : Matter in Our Surroundings - Class 9 PDF Download
Class IX Solutions of Ncert (Cbse) Chemistry
Matter in Our Surroundings
MCQs (Multiple Choice Questions) with solutions
Q.1: On Kelvin scale 0OC is equal to –
(a) 273 K
(b).– 273 K
(c) 0 K
(d) 100 K
Q.2: Liquids have -
(a) fixed volume and fixed shape
(b) fixed shape and no fixed volume
(c) fixed volume and no fixed shape
(d) neither fixed volume nor fixed shape
Q.3: Dry ice means –
(a) solid SO2
(b) solid water
(c) solid CO2
(d) solid CO
Q.4: Materials existing as liquids have -
(a) boiling point and melting point above room temperature
(b) boiling point and melting point below room temperature
(c) boiling point above room temperature and melting point below room temperature
(d) boiling point and melting point below room temperature
Q.5: Which of the following is accompanied by cooling?
(a) vaporization
(b) evaporation
(c) condensation
(d) none of these.
Q.6: Intermolecular force of attraction is maximum in -
(a) solids
(b) liquids
(c) gases
(d) plasma particles
Q.7: When we add sugar in water, particles of sugar disappear because they -
(a) are very small
(b) get into the spaces between water particles
(c) are moving
(d) all above
Q.8: One small crystal of potassium permanganate may contain particles -
(a) more than 103
(b) more than 104
(c) more than 105
(d) more than 106
Q.9: Which of the following statements is not correct?
(a) The density of ice is less than the density of water.
(b) To convert a temperature on the Kelvin scale to Celsius scale, subtract 273 from the given temperature.
(c) To convert a temperature on the Celsius scale to Kelvin scale, add 273 to the given temperature.
(d) Vaporization of a liquid causes cooling.
Q.10: Which of the following pairs will not exhibit diffusion?
(a) hydrogen, oxygen
(b) oxygen, water
(c) salt, sand
(d) sugar, water
Q.11: Which of the following substances is not a liquid?
(a) butter
(b) glass
(c) sponge
(d) rubber band
Q.12: The temperature at which the solid melts to become a liquid at the atmospheric pressure is called –
(a) boiling point
(b) melting point
(c) freezing point
(d) none of these.
Q.13: Which one of the following properties are not characteristics of liquids?
(a) fluidity
(b) definite shape
(c) definite volume
(d) compressibility
Q.14: Large volume of compressed natural gas (CNG) is available in small cylinders to us due to its property of -
(a) high inflammability
(b) easy availability
(c) high compressibility
(d) low density
Q.15: The compressibility of which state of matter is high –
(a) solid
(b) liquid
(c) gas
(d) all of these.
Q.16: A state of matter which has neither definite shape nor definite volume –
(a) solid
(b) liquid
(c) gas
(d) none of these.
Q.17: Gases are liquefied under
(a) high pressure, high temperature
(b) high pressure, low temperature
(c) low pressure, high temperature
(d) low pressure, low temperature
Q.18: Which of the following changes represent sublimation?
(a) solid ó liquid
(b) solid ó gas
(c) liquid ó gas
(d) gas ó liquid ó gas
Q.19: Gases do not have -
(a) high compressibility
(b) high fluidity
(c) high density
(d) large volume
Q.20: Which of the following is the simplest form of matter?
(a) element
(b) mixture
(c) compound
(d) none of these
Q.21: Evaporation of a material takes place -
(a) above its boiling point
(b) above its melting point
(c) below its boiling point
(d) below its melting point
Q.22: Particles of a liquid -
(a) are most ordered
(b) move randomly
(c) have large intermolecular spaces
(d) can slip and slid over each other
Q.23: Which is not the characteristic of matter –
(a) particles of a matter are continuously moving,
(b) particles of matter move faster on increasing temperature,
(c) particles of matter intermix with each other on their own,
(d) particles of all maters have same kinetic energy.
Q.24: The fluorescent tubes and neon sign bulbs glow because of -
(a) presence of charged particles
(b) high density of gases
(c) high temperature
(d) high applied voltage
Q.25: Which of the following will not sublime ?
(a) Camphor
(b) ammonium chloride
(c) bromine
(d) iodine
Solutions:
1 – a. 2 - c. 3 – c. 4 - c. 5 – b. 6 - a. 7 - d. 8 - d. 9 – d. 10 - c. 11 - a. 12 – b. 13 - b. 14 - c. 15 – c. 16 – c. 17 - b. 18 - b. 19 - c. 20 – a. 21 - c. 22 - d. 23 – d. 24 - a. 25 – c.
FAQs on MCQ with Solution : Matter in Our Surroundings - Class 9
| 1. What is matter? |  |
Ans. Matter is anything that occupies space and has mass. It can exist in three states, namely solid, liquid, or gas.
| 2. What is sublimation? | |
Ans. Sublimation is the process of changing a solid directly into a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) changing into gas on exposure to normal room temperature.
| 3. What is the difference between evaporation and boiling? | |
Ans. Evaporation is the process of changing liquid into a gas at any temperature below the boiling point. Boiling, on the other hand, is the process of changing liquid into a gas at a specific temperature called the boiling point.
| 4. What is the role of intermolecular forces in matter? | |
Ans. Intermolecular forces are the forces of attraction and repulsion between molecules. They determine the physical properties of matter, such as melting point, boiling point, and viscosity. The strength of intermolecular forces varies between different states of matter, with solids having the strongest intermolecular forces and gases having the weakest.
| 5. Why does the boiling point of water decrease at high altitudes? | |
Ans. The boiling point of water decreases at high altitudes because the atmospheric pressure decreases with altitude. The boiling point of a liquid is the temperature at which its vapor pressure is equal to the atmospheric pressure. At high altitudes, the atmospheric pressure is lower, so the vapor pressure of water at its boiling point is also lower, and hence, it boils at a lower temperature.
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