#### 9th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - One

9th Standard

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Science

Time : 00:20:00 Hrs
Total Marks : 20

Part A

20 x 1 = 20
1. Choose the correct one

(a)

mm< cm < m < km

(b)

mm > cm > m > km

(c)

km < m < cm < mm

(d)

mm > m> cm> km

2. Moment is equal to_________of an hour.

(a)

$\frac{1}{40}$

(b)

$\frac{1}{80}$

(c)

$\frac{1}{60}$

(d)

$\frac{1}{20}$

3. In a 100 m race, the winner takes 10s to reach the finishing point. The average speed of the winner is

(a)

5ms-1

(b)

20ms-1

(c)

40 ms-1

(d)

10 ms-1

4. In which direction of the motion of the particles does centripetal force act?

(a)

parallel

(b)

(c)

tangential

(d)

perpendicular

5. When the reflecting surface is curved outwards the mirror formed will be

(a)

concave mirror

(b)

convex mirror

(c)

plane mirror

6. The separation of denser particles from lighter particles done by rotation at high speed is called ________

(a)

Filtration

(b)

sedimentation

(c)

decantation

(d)

centrifugation

7. The correct electronic configuration of potassium is

(a)

2,8,9

(b)

2,8,1

(c)

2,8,8,1

(d)

2,8,8,3

8. Law of multiple proportions was proposed by _________

(a)

J. Ritcher

(b)

Rutherford

(c)

John Dalton

(d)

J.J Thomson

9. The plant part which exhibits negative geotropism is __________.

(a)

root

(b)

stem

(c)

branch

(d)

leaves

10. The animal without skull is

(a)

Acrania

(b)

Acephalia

(c)

Apteria

(d)

Acoelomate

11. Identify the single celled organism.

(a)

Fern

(b)

Rabbit

(c)

Cat

(d)

Pond algae

12. A device in which the loss of heat due to conduction, convection and radiation is minimized is

(a)

Solar cell

(b)

Solar cooker

(c)

Thermometer

(d)

13. Transformer works on.

(a)

AC only

(b)

DC only

(c)

bothAC and DC

(d)

AC nor effectively than DC

14. ____________compounds have high melting and boiling points.

(a)

Covalent

(b)

Coordinate

(c)

Ionic

(d)

Coordinate

15. Aerenchyma is found in

(a)

epiphytes

(b)

hydrophytes

(c)

halophytes

(d)

xerophytes

16. Which one of the following substance is not a constituent of sweat?

(a)

Urea

(b)

Protein

(c)

Water

(d)

Salt

17. Which of the following statement best describes frequency?

(a)

the number of complete vibrations per second.

(b)

the distance travelled by a wave per second.

(c)

the distance between one crest of wave and the next one.

(d)

the maximum disturbance caused by a wave.

18. Diamond is not a good conductor of electricity because

(a)

it is very hard

(b)

it has no free electron

(c)

its structure is uniform

(d)

it is insoluble in water

(a)

oxidants

(b)

batteries

(c)

isotopes

(d)

nanoparticles

20. Which one of the following is refered as red worms?

(a)

Eudrilus fetida

(b)

Eudrilus eugieniae

(c)

Perionyx excavatus

(d)

Lampito mauritii