#### 9th Standard Science English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 6

9th Standard

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Science

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

Part A

20 x 1 = 20
1. Density is_________

(a)

$\frac{volume}{mass}$

(b)

$\frac{mass}{volume}$

(c)

$\frac{area}{volume}$

(d)

$\frac{volume}{area}$

2. Force involved in uniform circular motion is given by _______________

(a)

f = mv2/r

(b)

f = mvr

(c)

f= mr2/v

(d)

f = v2/r

3. A body moving along a circular path has _______

(a)

constant speed

(b)

constant velocity

(c)

(d)

no tangential velocity

4. Gas particles can be forced to get closer and can be easily compressed.So_______increases.

(a)

pressure

(b)

volume

(c)

mass

(d)

weight

5. Among the following the odd pair is

(a)

8O18, 17cl37

(b)

18Ar40,7N14

(c)

14Si30, 15pd31

(d)

24cr54, 19K39

6. Maximum number of electrons that can be accommodated in an energy level is given by the formula ___________

(a)

n2

(b)

2n2

(c)

3n2

(d)

2n3

7. Identify the emerald green sea slug________________.

(a)

Vaucheria litorea

(b)

Nepenthes

(c)

Droseta

(d)

Elysia chlorotica

8. Find the group having only marine members

(a)

Mollusca

(b)

Porifera

(c)

Coelenterata

(d)

Echinodermata

9. Find the incorrect pair.

(a)

Earth worm - Metamerism

(b)

Round worm - Pseudocoelom

(c)

Hydra Polyp - Medusa

(d)

Star fish - Asymmetrical

10. The body of soft bodied animals are covered by__________.

(a)

Spicules

(b)

Scales

(c)

Bristles

(d)

Mantle

11. Identify the protein deficiency disease

(a)

Marasmus

(b)

Pellagra

(c)

bow legs

(d)

Goitre

12. Two cylinders of equal height and radius are made of copper and aluminium. Which of them conducts heat faster?

(a)

Copper rod

(b)

Aluminium rod

(c)

Both of them

(d)

None of them

13. Elements in the modern periodic table are arranged in__________ groups and __________ periods.

(a)

7,18

(b)

18,7

(c)

17,8

(d)

8, 17

14. d-block elements are otherwise known as_______

(a)

transition elements

(b)

inner transition elements

(c)

halogens

(d)

alkali metals

15. You are given pure water to test the pH value using pH paper. It shows colour

(a)

White

(b)

black

(c)

green

(d)

black

16. Which of the following solution is soapy to touch?

(a)

Acidic

(b)

Basic

(c)

Salt

(d)

Aquaregia

17. Which of the following is not a salivary gland?

(a)

Sublingual

(b)

Lachrymal

(c)

Submaxillary

(d)

Parotid

18. Name the cable that connects CPU to the monitor.

(a)

Ethernet

(b)

VGA

(c)

HDMI

(d)

USB

19. Which of the following is not a member of the solar system?

(a)

An asteroid

(b)

A satellite

(c)

A constellation

(d)

A comet

20. 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