Class 9 CBSE Science Test Exam For 2022 || (physics, chemistry and Biology) combined question

 Class 9 CBSE Science Test Exam For 2022

Q1. When the liquid is spun rapidly, the denser particles are forced to the bottom and the lighter particles stay at the top. This principle is used in:

(a) Centrifugation
(b) Fractional distillation
(c) Evaporation
(d) Tunneling

Q2.Boron and carbon are

(a) metalloids
(b) metalloid and non-metal respectively
(c) metal
(d) non-metal and metalloid respectively

Q3.What is the name of the metal which exists in liquid state at room temperature

(a) Mercury
(b) Bromine
(c) Sodium
(d) Potassium

Q4.Sol and gel are examples of

(a) Solid-solid colloids
(b) Sol is a solid-liquid colloid and gel is liquid solid colloid
(c) Sol is solid-solid colloid and gel is solid-liquid colloid
(d) Sol is a liquid-solid colloid and gel is a solid-liquid colloid

5.  The unit of work is joule. The other physical quantity that has same unit is

        (a) power         (b) velocity         (c) energy         (d) force

6.  The spring will have maximum potential energy when

        (a) it is pulled out         (b) it is compressed

        (c) both (a) and (b)         (d) neither (a) nor (b)

7.   The energy possessed by an oscillating pendulum of a clock is

        (a) kinetic energy         (b) potential energy

        (c) restoring energy.         (d) mechanical energy

Question 8.

Which of the following statements are true for pure substances?

(i) Pure substances contain only one kind of particles

(ii) Pure substances may be compound or mixtures

(iii) Pure substances have the same composition throughout

(iv) Pure substances can be exemplified by all elements other than nickel

(a) (i) and (ii)

(b) (i) and (iii)

(c) (iii) and (iv)

(d) (ii) and (iii)

Answer

Question 9.

Rusting of an article made up of iron is called

(a) corrosion and it is a physical as well as chemical change

(b) dissolution and it is a physical change

(c) corrosion and it is a chemical change

(d) dissolution and it is a chemical change

Answer

Question 10.

A mixture of sulphur and carbon disulphide is

(a) heterogeneous and shows Tyndall effect

(b) homogeneous and shows Tyndall effect

(c) heterogeneous and does not show Tyndall effect

(d) homogeneous and does not show Tyndall effect

Answer

Question 11.

Tincture of iodine has antiseptic properties. This solution is made by dissolving

(a) iodine in potassium iodide

(b) iodine in vaseline

(c) iodine in water

(d) iodine in alcohol

Answer

Question 12.

Which of the following are homogeneous in nature?

(i) ice

(ii) wood

(iii) soil

(iv) air

(a) (i) and (iii)

(b) (ii) and (iv)

(c) (i) and (iv)

(d) (iii) and (iv)

13.) Basic unit of living body

a) Small room

b) Tissue

c) Hairs

d) Cell

14.) ………………. Is not unicellular organism

a) Cactus

b) Chlamydomonas

c) Paramecium

d) Bacteria

15.) ………………Is not multicellular organism

a) Human

b) Plant

c) Amoeba

d) Cactus

16.) Every multicellular organism has originated from………..

a) Human

b) Single cell

c) Bacteria

d) Tissue

17.) ……………. Cell is not found in human body

a) Blood

b) Nerve

c) Fat

d) Electro

18.) Shape and size of cell are depend on their…………….

a) Texture

b) Shape

c) Function

d) chemical

19.) Human body is originated from……………

a) mother

b) Stomach of mother

c) Single cell

d) None of them

20.) Each cell has certain specific component within it known as ……………………

a) Cell body

b) Cytoplasm

c) Cell organelles

d) None of them

21.) Cell is seen under……………….

a) Stethoscope

b) Thermometer

c) Microscope

d) None of them

22.) ……………………. Is cell organelle

a) Amoeba

b) Bacteria

c) Cytoplasm

d) Plasmodium

23.) Outermost covering of cell that separates the contents of cell from its external environment

a) Cell envelope

b) Cell cover

c) Cell membrane

d) Cell protector

24.) …………………….. is allows or permits the entry and exit of some material in and out of the cell

a) Cell envelope

b) Cell cover

c) Cell membrane

d) Cell protector

25.) …………………. Is called selectively permeable membrane

a) Cell envelope

b) Cell cover

c) Cell membrane

d) Cell protector

26.) Carbon dioxide or oxygen can move across the cell membrane by a process called……..

a) Reverse Osmosis

b) Diffusion

c) Transportation

d) Circulation

27.) …………….. process plays important role in gaseous exchange between cells as well as the cell and its external environment

a) Reverse Osmosis

b) Diffusion

c) Transportation

d) Circulation

28.) The movement of water molecules through such a selectively permeable membrane is called………..

a) Osmosis

b) Diffusion

c) Transportation

d) Circulation

29.) The cell is swell up by ……………… solution

a) Hypertonic solution

b) Hypotonic solution

c) Isotonic solution

d) None of them

30.) When the medium is behaving like hypertonic solution

a) Cell is swell up

b) Cell size retain as it is

c) Cell will shrink

d) All of them

31.) The cell will stay the same size…………………. Solution

a) Hypertonic solution

b) Hypotonic solution

c) Isotonic solution

d) None of them

32.) When the medium is behaving like isotonic solution

a) Cell is swell up

b) Cell is size retain as it is

c) Cell will shrink

d) All of them