#### 10th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Two

10th Standard

Reg.No. :
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Science

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

Part A

35 x 1 = 35
1. In which of the following sport the turning of effect of force used

(a)

swimming

(b)

tennis

(c)

cycling

(d)

hockey

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. A force is applied by direct physical contact between two bodies is

(a)

Contact force

(b)

Non - contact force

(c)

Balanced force

(d)

Unbalanced force

4. When you paddle a canoe, the canoe goes forward. This is an example of _______

(a)

Newton's I law

(b)

Newton's II law

(c)

Newton's III law

(d)

Law of conservation

5. Magnification of a convex lens is

(a)

Positive

(b)

negative

(c)

either positive or negative

(d)

zero

6. _____ determines speed of light in a medium.

(a)

thickness

(b)

wavelength

(c)

refractive index

(d)

both b and c

7. Temperature is the average ______ of the molecules of a substance

(a)

difference in K.E and P.E

(b)

sum of P.E and K.E

(c)

difference in T.E and P.E

(d)

difference in K.E and T.E

8. SI unit of heat is

(a)

calorie

(b)

joule

(c)

kilo calorie

(d)

kelvin

9. In a simple circuit, why does the bulb glow when you close the switch?

(a)

The switch produces electricity

(b)

Closing the switch completes the circuit.

(c)

Closing the switch breaks the circuit.

(d)

The bulb is getting charged.

10. The resistance of material depends on.

(a)

Temperature

(b)

Length of conductor

(c)

Area of cross-section

(d)

All the above

11. The frequency, which is audible to the human ear is

(a)

50 kHz

(b)

20 kHz

(c)

15000 kHz

(d)

10000 kHz

12. Distance between two consecutive compressions is

(a)

λ

(b)

λ/2

(c)

λ/4

(d)

13. ____________ isotope is used for the treatment of cancer.

(a)

(b)

(c)

(d)

14. A chain reaction is continuous due to

(a)

large mass defect

(b)

large energy

(c)

production of more neutrons in fission

(d)

None of these

15. Mass of 1 mole of Nitrogen atom is

(a)

28 amu

(b)

14 amu

(c)

28 g

(d)

14 g

16. Atomicity of Chlorine and Neon is

(a)

Mono atomic and mono atomic

(b)

Mono atomic and diatomic

(c)

Diatomic and diatomic

(d)

Diatomic and mono atomic

17. _____ is a relative periodic property

(a)

(b)

(c)

electron affinity

(d)

electronegativity

18. The first period of the modern periodic table has ________ elements.

(a)

1

(b)

2

(c)

3

(d)

8

19. 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

20. Quick lime is dissolved in water is a ______________ process.

(a)

exothermic

(b)

endothermic

(c)

reversible

(d)

both (a) and (b)

21. The chemical equation Na2SO4(aq) + BaCl2(aq) → BaSO4(s)↓ + 2NaCl(aq) represents which of the following types of reaction?

(a)

Neutralisation

(b)

Combustion

(c)

Precipitation

(d)

Single displacement

22. Formation of ammonia from nitrogen and hydrogen is an example of __________ reaction.

(a)

Thermal decomposition

(b)

Combination

(c)

Precipitation

(d)

Displacement

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. Which is formed during anaerobic respiration

(a)

Carbohydrate

(b)

Ethyl alcohol

(c)

Acetyl CoA

(d)

Pyruvate

25. The body of leech has

(a)

23 segments

(b)

23 segments

(c)

38 segments

(d)

30 segments

26. The wall of human heart is made of

(a)

Endocardium

(b)

Epicardium

(c)

Myocardium

(d)

All of the above

27. There are ________ pairs of cranial nerves and _______ pairs of spinal nerves.

(a)

12, 31

(b)

31, 12

(c)

12, 13

(d)

12, 21

28. Avena coleoptile test was conducted by

(a)

Darwin

(b)

N. Smit

(c)

Paal

(d)

F.W. Went

29. Syngamy results in the formation of____________

(a)

Zoospores

(b)

Conidia

(c)

Conidia

(d)

Chlamydospores

30. The region of the chromosome where the spindle fibres get attached during cell division

(a)

Chromomere

(b)

Centrosome

(c)

Centromere

(d)

Chromonema

31. The best way of direct dating fossils of recent origin is by

(a)

(b)

(c)

Potassium-argon method

(d)

Both (a) and (c)

32. We can cut the DNA with the help of

(a)

scissors

(b)

restriction endonucleases

(c)

knife

(d)

RNAase

33. Metastasis is associated with

(a)

Malignant tumour

(b)

Benign tumour

(c)

Both (a) and (b)

(d)

Crown gall tumour

34. Soil erosion can be prevented by

(a)

deforestation

(b)

afforestion

(c)

over growing

(d)

removal of vegetation

35. All files are stored in the _____________

(a)

Folder

(b)

box

(c)

Pai

(d)

scanner