Question

An object travels 40 m in 5 seconds and then another 80 m in 5 seconds. What is the average speed of the object?
2/2
12m/s

6m/s
2m/s
0m/s

The S.I unit of distance is
2/2
Captionless Image
A

B
C
D

A driver increases the speed of a car from 10 m/s to 25 m/s in 5 seconds. What is the acceleration of car?
2/2
Captionless Image
A
B
C

D

The slope of speed - time graph gives
2/2
Distance travelled
Velocity
Acceleration

Displacement

A body is moving in a circular path of radius r. The displacement after half circle would be
2/2
0
πr
2πr
2r


Which of the following is not a vector quantity?
2/2
Displacement
Speed

Acceleration
Velocity

The slope of Distance-Time graph gives
2/2
Speed

Acceleration
Distance travelled
Displacement

A body covers a distance of 3 km in 5 minutes, its speed in meter per second would be
2/2
10 m/s

100 m/s
0.1 m/s
1000 m/s

The distance travelled by a car is measured by an instrument called speedometer
2/2
True
False

CHEMISTRY
14 of 16 points
MATTER IN OUR SURROUNDINGS

Which of the following has highest kinetic energy?
2/2
Particles of ice at 0 °C
Particles of water at 0 °C
Particles of water at 100 °C
Particles of steam at 100 °C


Which of the following is most suitable for summer?
2/2
Cotton

Nylon
Polyester
Silk.

The colour of vapours formed on sublimation of iodine solid is
2/2
Purple (violet)

Colourless
Yellow
Orange

Under which of the following conditions we can boil water at room temperature?
2/2
At low pressure

At high pressure
At very high pressure
At atmospheric pressure

Which of the following does not affect rate of evaporation?
2/2
Wind speed
Surface area
Temperature
Insoluble heavy impurities


Kinetic energy of molecules is directly proportional to
2/2
Temperature

Pressure
Both (a) and (b)
Atmospheric pressure

0/2
Captionless Image
a
b

c
d
Correct answer
a

Dry ice means-
2/2
Captionless Image
a
b
c

d
BIOLOGY
8 of 16 points
CELL : THE FUNDAMENTAL UNIT OF LIFE

A cell was first observed by Robert Hooke in the year
2/2
a) 1965
b) 1865
c) 1765
d) 1665


Radhika put some animal cells in a particular solution. After two hours she found that all the cells are shrinked, means she used
0/2
a) Isotonic solution
b) Hypotonic solution
c) Hypertonic solution
d) Distilled water

The phenomenon of shrinkage of protoplast away from the cell wall is
0/2
a) Plasmolysis
b) Diffusion
c) Osmosis
d) Differentiation

Correct answer
a) Plasmolysis

The lipids and proteins essential for the formation of cell membrane are synthesized in
2/2
a) Golgi bodies
b) Endoplasmic reticulum

c) Mitochondria
d) Nucleus

Plant cell wall is made up of
2/2
a) Chitin
b) Cellulose

c) Pectin
d) Lignin

Which one of the following is not found in animal cell?
2/2
a) Small vacuoles
b) Many vacuoles
c) Large size vacuoles

d) Small and many vacuoles

Lysosomes are called power house of cell.
0/2
TRUE

FALSE
Correct answer
FALSE

Human body has eukaryotic cells.
0/2
TRUE
FALSE

Correct answer
TRUE​

Answer 1

Answer:

1 . Avg speed= Total dist/Total time

=120/10= 12m/s

2.Si unit of dist= m (metre)

3.change in acc= change in velocity/time = 15/5= 3m/s^2

4 Acceleration

5.πr

6.Acceleration

7.speed

8. 10m/s (3/5/60 kmph= 36×5/18 m/s)

9.True

chemistry:

Particle of water at 100°C

Cotton

Purple(violet)

at high pressure

impurities

both a and b

not clear

dry ice means solid CO2

Biology

1665

Hypertonic solution

Plasmolysis

Endoplasmic reticulum

Cellulose

Large size vacuole

False

True