https://www.sciencearena.in/p/education-resources.html
|
SCIENCE (IX) MATTER IN OUR SURROUNDINGS |
|
MULTIPLE CHOICE QUESTIONS
(MCQs) |
|
1 |
What name is associated with conversion of Ice into water? (a) Evaporation (b) Sublimation (c) Freezing (d) fusion |
1 |
|
2 |
he latent heat of vaporization of water is: a. 2.26 x 105 J/kg b. 2.26 x 106 J/kg c. 22.6 x 106 J/kg d. 6.22 x 10 J/kg |
1 |
|
3 |
During evaporation, particles of a liquid change to vapours only: a. from the surface b. from the bulk c. Both a. and b d. Neither a. nor b. |
1 |
|
4 |
During summer, water kept in an earthen pot becomes cool because of
the phenomenon of: a. diffusion b osmosis c. transpiration d. evaporation |
1 |
|
5 |
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 |
1 |
|
6 |
The property to 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 |
1 |
|
7 |
When a cell is placed in a medium, and it increases in size, the
external medium is: a. Isotonic b. hypertonic c. hypotonic d. None of these |
1 |
|
ASSERTION AND REASON QUESTIONS
(a) Both Assertion (A) and
Reason (R) are true and Reason (R) is the correct explanation of the
Assertion (A). (b) Both Assertion (A) and
Reason (R) are true and Reason (R) is not the correct explanation of the
Assertion (A). (c) Assertion (A) is true, and
Reason (R) is false. (d) Assertion (A) is false,
and Reason (R) True. |
|
8 |
Assertion (A): When sugar crystals dissolve in
water, the level of water does not change. Reason (R): Sugar
particles occupy the intermolecular space between the water molecules. |
1 |
|
9 |
Assertion (A): The
intermolecular forces in solid state are stronger than those in the liquid
state. Reason (R): The space
between the particles of matter is called intermolecular space. |
1 |
|
10 |
Assertion (A): Liquids
diffuse easily as compared to gases. Reason (R): Intermolecular
forces in liquids are greater than in gases. |
1 |
|
11 |
Assertion (A):
Naphthalene, camphor, iodine, ammonium chloride are some common examples of
the substances which undergo sublimation. Reason (R): All solids are
first converted to liquids and then to gases on heating. |
1 |
|
VERY SHORT ANSWER QUESTIONS |
|
12 |
Why is ice at 273 K more effective in cooling than water at the same
temperature? |
2 |
|
13 |
Give two properties of solid. |
2 |
|
14 |
Why does our palm feel cold when we put some acetone or petrol or
perfume on it? |
2 |
|
15 |
Does the evaporation of a liquid occur only at a fixed temperature? |
2 |
|
16 |
Name the property of gases due to which large volume of CNG can be
filled in small cylinders easily. |
2 |
|
SHORT ANSWER TYPE QUESTIONS |
|
17 |
(i) When 45 g of sugar is dissolved in 100 mL of water, there is no
increase in volume. Which characteristic of matter is represented by this
observation? (ii) Explain the process which occurs when a drop of Dettol is added
to water. |
3 |
|
18 |
What are the characteristics of the particles of matter? |
3 |
|
19 |
Describe an activity to show that particles of matter have space
among them. |
3 |
|
20 |
Why does a desert cooler cool better on a hot dry day? |
3 |
|
21 |
How do you differentiate between solids, liquids and gases on the
basis of their melting and boiling points? |
3 |
|
22 |
We can easily move our hand in air but to do the same through a solid
block of wood, we would need a 'Karate expert'. Explain |
3 |
|
23 |
Convert the following temperature inti 0C. 1) 278
K 2) 343
K 3) 576
K 4) 445
K 5) 341
K 6) 314
K |
3 |
|
LONG ANSWER TYPE QUESTIONS |
|
24 |
Describe an activity to show that matter is made up of small
particles. OR Explain the following: (i) When sugar crystals dissolve in water, the level of water does
not rise appreciably. (ii) A wooden table should be called a solid. (iii) Dogs generally hang out their tongue in summer. (iv) Iron almirah is a solid at room temperature. (v) Oxygen is called a gas. |
5 |
|
25 |
Explain with diagram to show the inter-conversion of states of
matter. |
5 |
|
26 |
Tabulate the difference between states of matter. |
5 |
|
27 |
Define the following terms: (i) Compressibility (ii) Rigidity (iii) Fluidity (iv) Fusion (v) Melting point |
5 |
|
28 |
Define evaporation. List the factors on which the rate of evaporation
depends and explain how it depends on each of them? |
5 |
|
CASE BASED STUDY QUESTIONS |
|
29 |
Read the given passage
carefully and give the answer of the following questions: Every matter is made up of
tiny particles. These particles are so tiny that they can't be seen with
naked eyes. The three characteristics shown by particles of matter are as
follows: (i) There are small voids between particles in a matter. This
characteristic is the concept behind the solubility of a substance in other
substances. (ii) Particles of matter show continuous random movements, that is
they possess kinetic energy. The spreading of ink in a beaker of glass, smell
of agarbattis, etc. are few illustrations that show the movement of particles
of a substance. (iii) The particles of matter attract each other with a force called
interparticle force of attraction. 1. Name the elements by which elements are formed. 2. Why is the rate of diffusion of liquids higher than that of
solids? 3. What happens when we add sugar to water? 4. Spreading of fragrance of a burning incense stick in a room shows which
property. |
4 |
|
30 |
Read the given passage
carefully and give the answer of the following questions: All the materials we see in our daily life are made up of matter.
Matter can be classified into different states such as solid, liquid and gas
on the basis of intermolecular forces and the arrangement of particles. In a
solid, particles are tightly packed together and have very low kinetic
energy. They have a definite shape and a certain volume. In a liquid, particles are loosely packed than in a solid and are
able to flow around each other, giving the liquid an indefinite shape. In a
gas, the particles have a great deal of space between them and have high
kinetic energy. A gas has neither definite shape nor volume. 1. What is matter? 2. Name the particles of matter which have high force of attraction. 3. Explain fluidity. 4. What do you mean by inter- molecular space. |
4 |