TNPSC Group 4 Science Important Questions

TNPSC Group 4 Science Important Questions

TNPSC Group 4 Science Important Questions: Dear Friends we have added TNPSC Group 4 Science Important Questions for the upcoming Group 4 Examinations you can download TNPSC Group 4 Science Important Questions as pdf once we complete the important questions.

1.Unit of speed is

a. m b. s c. kg d. m/s

answer d. m/s

2. Oscillatory motion among the following is

a. Rotation of the earth about its axis
b. Revolution of the moon about the earth
c. To and fro movement of a vibrating string
d. All of these.

Answer c. To and fro movement of a vibrating string

3. The correct relation among the following is
(a) Speed = distance × time
(b) speed = distance / time
(c) Speed = time / distance
(d) speed = 1/ (distance × time)
Answer: (b) speed = distance / time

4. Gita rides with her father’s bike to her uncle’s house which is 40 km away from her home. She takes 40 minutes to reach there.
Statement 1 : She travels with a speed of 1 km/minute
Statement 2: She travels with a speed of 1 km/hour
a. Statement 1 alone is correct.
b. Statement 2 alone is correct
c. Both statement 1 and 2 are correct.
d. Neither statement 1 nor statement 2 is correct.
Answer: a. Statement 1 alone is correct.

5. When an object is heated, the molecules that make up the object
(a) begin to move faster
(b) lose energy
(c) become heavier
(d) become lighter
Answer: (a) begin to move faster

6. The unit of heat is
(a) newton
(b) joule
(c) volt
(d) Celsius
Answer: (b) Joule

7. One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of the mixture will be
(a) 80°C
(b) More than 50°C but less than 80°C
(c) 20°C
(d) around 40°C
Answer: (d) around 40°C

8. An iron ball at 50°C is dropped in a mug containing water at 50°C. The heat will
(a) flow from iron ball to water.
(b) not flow from iron ball to water or from water to iron ball.
(c) flow from water to iron ball.
(d) increase the temperature of both.
Answer: (b) not flow from iron ball to water or from water to iron ball

9. The device which converts chemical energy into electrical energy is
(a) fan
(b) solar cell
(c) cell
(d) television
Answer: (c) cell

10. Electricity is produced in
(a) transformer
(b) power station
(c) electric wire
(d) television
Answer: (b) power station

11. ……… is a good conductor
(a) silver
(b) wood
(c) rubber
(d) plastic
Answer: (a) silver

12. An object that is attracted by magnet.
(a) wooden piece
(b) plain pins
(c) eraser
(d) a piece of paper
Answer: (b) plain pins

13. People who made mariner’s compass for the first time.
a. Indians
b. Europeans
c. Chinese
d. Egyptians
Answer: c. Chinese

14. A freely suspended magnet always comes to rest in the
(a) North – East
(b) South – West
(c) East – West
(d) North – South
Answer: (d) North-South

TNPSC Group 4 Science Important Questions

15. Magnets lose their properties when they are
a. used
b. stored
c. hit with a hammer
d. cleaned
Answer: c. hit with a hammer

16. Mariner’s compass is used to find the
(a) speed
(b) displacement
(c) direction
(d) motion
Answer: (c) direction

17. Which of the following is a derived unit?
(a) mass
(b) time
(c) area
(d) length
Answer: (c) area

18. Which of the following is correct?
(a) 1L=lcc
(b) 1L= l0cc
(c) 1L= l00cc
(d) 1L= l000cc
Answer: (d) 1L = 1000cc

19. SI unit of density is
(a) kg/m²
(b) kg/m³
(c) kg/m
(d) g/m³
Answer: (b) kg/m³

20. Two spheres have equal mass and volume in the ratio 2:1. The ratio of their density is
(a) 1:2
(b) 2:1
(c) 4:1
(d) 1:4
Answer: (b) 2:1

21. Light year is the unit of
(a) Distance
(b) time
(c) density
(d) both length and time
Answer: (a) Distance

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