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CBSE - IX Science Solved Questions

### Question 1

An athlete completes one round on a circular track of radius 'R' in seconds.
The distance travelled at the end of minutes seconds is ____.

A) 7πR
B) 2πR
C) 2R
D) Zero

### Question 2

Force 'F' applied on mass 'm' gives an acceleration of 15 m/s to it. When same force is applied on mass 'm', it produces an acceleration of 10 m/s. If the two masses are fixed together and the same force is applied on the combination then the acceleration will be ____ m/s.
A) 6
B) 8
C) 9
D) 11

### Question 3

When two unequal masses possess the same momentum, then, the kinetic energy of the heavier mass is ____ the kinetic energy of the lighter mass.
A) same as
B) greater than
C) smaller than
D) far greater than

### Question 4

A wave completes 24 cycles in 0.8 s. The frequency of the wave is ____ Hz.
A) 12
B) 8
C) 30
D) 14

### Question 5

Identify the incorrect statement.
A) The intermolecular distance between the particles in gases is maximum.
B) The intermolecular distance between the particles in liquids is less compared to gases.
C) The intermolecular distance between the particles in gases is more than in liquids.
D) The intermolecular distance between the particles in gases is minimum.

### Question 6

How would you separate sulphur from a mixture of iron and sulphur?
A) By filtration
B) By distillation
C) By sublimation
D) By magnet

### Question 7

What mass of carbon dioxide will contain 3.011 × 1023molecules?
A)
B)
C)
D)

### Question 8

The maximum number of electrons that can be accommodated in the innermost shell are ____.
A) 8
B) 2
C) 18
D) 32

### Question 9

The cell becomes turgid when cell is placed in ____ solution.
A) hypertonic
B) hypotonic
C) isotonic
D) atonic

### Question 10

Which of the following statements is correct regarding lichen?
A) Consists of an alga and a fungus.
B) Consists of a fungus and a bacterium.
C) Composite organisms of any type.
D) Consists of two different fungi.