#### 10th Standard Science English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 6

10th Standard

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Science

Time : 00:35:00 Hrs
Total Marks : 35

Part A

35 x 1 = 35
1. One kilogram force equals to

(a)

9.8 dyne

(b)

9.8 × 104 N

(c)

98 × 104 dyne

(d)

980 dyne

2. The resistance of a body to change its state of motion is called

(a)

force

(b)

momentum

(c)

inertia of motion

(d)

inertia of direction

3. An ice skater pushes harder with his leg muscles, he begins to move faster. This is an example of

(a)

Newton's I law

(b)

Newton's II law

(c)

Newton's III law

(d)

Law of conservation

4. The force of gravitation between two bodies in the universe does not depend on

(a)

the distance between them

(b)

the product of their masses

(c)

the sum of their masses

(d)

the gravitational constituent

5. Power of a lens is –4D, then its focal length is

(a)

4m

(b)

–40m

(c)

–0.25 m

(d)

–2.5 m

6. The splitting up of white light into colours is called

(a)

reflection

(b)

refraction

(c)

scattering

(d)

dispersion

7. When a person uses a convex lens as a simple magnifying glass, the object must be placed at a distance

(a)

less than one focal length

(b)

more than one focal length

(c)

less than twice focal length

(d)

more than twice the focal length

8. Objective of telescope is of

(a)

Short focal length & short aperture

(b)

Short focal length & large aperture

(c)

Large focal length & large aperture

(d)

Large focal length & short aperture

9. A parallel circuit consist of three resistors with values of 430, 210 and 100. The total resistance is

(a)

0.017 ohm

(b)

58.82 ohm

(c)

58.82 kilo ohm

(d)

None of the above

10. If the resistance in a series circuit doubles, total current will be

(a)

doubles

(b)

halved

(c)

same

(d)

Increases

11. Which options show the correct direction of current?

(a)

(b)

(c)

(d)

12. What does it mean when a wave's amplitude increases?

(a)

Its frequency also increases

(b)

It is moving in denser medium

(c)

Its wavelength gets longer

(d)

It carries more energy

13. Radio ________ is used in the treatment of cancer.

(a)

sodium

(b)

cobalt

(c)

iron

(d)

phosphorous

14. Order of temperature of fusion reaction is ________kelvin.

(a)

1017

(b)

107

(c)

1010

(d)

103

15. The number of atoms in 0.1 mole of a triatomic gas is

(a)

6.023 x 1022

(b)

1.806 x 1023

(c)

3.6 X 1023

(d)

1.8 x 1022

16. Atomicity of Sulphur is

(a)

1

(b)

2

(c)

4

(d)

8

17. Electronegativity values are based on ______________

(a)

bond energy

(b)

electron affinity

(c)

ionisation energy

(d)

all the above

18. Identify the non aqueous solution.

(a)

sodium chloride in water

(b)

glucose in water

(c)

copper sulphate in water

(d)

sulphur in carbon-di-sulphide

19. A beaker contains a solution of copper sulphate. precipitation of copper sulphate takes place when small amount of it added to ________ solution.

(a)

Saturated

(b)

Super saturated

(c)

Unsaturated

(d)

Concentrated

20. Which of the following represents a precipitation reaction?

(a)

A(s) + B(s) → C(s) + D(s)

(b)

A(s) + B(aq) → C(aq) + D(l)

(c)

A(aq) + B(aq) → C(s) + D(aq)

(d)

A(aq) + B(s) → C(aq) + D(l)

21. An element 'A' on exposure to moist air turns to form compound 'B' which is reddish brown. Identify 'A'.and 'B'

(a)

'A' is Ag, 'B' is Ag2s

(b)

'A' is Cu, 'B' is CuO

(c)

'A' is Mg, 'B' is MgO

(d)

'A' is Fe, 'B' is Fe2O3

22. Ionic product of water is expressed

(a)

Kw = [Hp+] [OH-]

(b)

Kw = [H+] [OH-]

(c)

both (a) and (b)

(d)

neither (a) nor (b)

23. Rectified spirit is an aqueous solution which contains about _______ of ethanol

(a)

95.5 %

(b)

75.5 %

(c)

55.5 %

(d)

45.5 %

24. According to IUPAC rules, the secondary suffix used to represent carboxylic acids is  _________________.

(a)

al

(b)

ol

(c)

ate

(d)

oic

25. Kreb’s cycle takes place in

(a)

chloroplast

(b)

mitochondrial matrix

(c)

stomata

(d)

inner mitochondrial membrane

26. ‘Heart of heart’ is called

(a)

SA node

(b)

AV node

(c)

Purkinje fibres

(d)

Bundle of His

27. Two chambered heart is seen in__________

(a)

fish

(b)

amphibian

(c)

reptiles

(d)

mammals

28. Node of Ranvier is found in

(a)

muscles

(b)

axons

(c)

dendrites

(d)

cyton

29. Cyton is also called cell body or ______

(a)

axon

(b)

perikaryon

(c)

neuroglia

(d)

neuron

30. Premature shedding is caused by ______

(a)

auxin

(b)

ethylene

(c)

ABA

(d)

gibberellin

31. A single highly coiled tube where sperms are stored, get concentrated and mature is known as

(a)

Epididymis

(b)

Vasa efferentia

(c)

Vas deferens

(d)

Seminiferous tubules

32. Paleontologists deal with

(a)

Embryological evidences

(b)

Fossil evidences

(c)

Vestigial organ evidences

(d)

All the above

33. We can cut the DNA with the help of

(a)

scissors

(b)

restriction endonucleases

(c)

knife

(d)

RNAase

34. Cancer of the epithelial cells is called

(a)

Leukemia

(b)

Sarcoma

(c)

Carcinoma

(d)

Lipoma