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

10th Standard

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Science

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

Part A

35 x 1 = 35
1. Impulse is equals to

(a)

rate of change of momentum

(b)

rate of force and time

(c)

change of momentum

(d)

rate of change of mass

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. The law that gives a qualitative definition of force is _______

(a)

Newton's I law

(b)

Newton's II law

(c)

Newton's III law

(d)

Law of gravitation

4. A force of 20N is acting on an object of mass 10 kg. The acceleration produced is

(a)

1 ms-2

(b)

2 ms-2

(c)

20 ms-2

(d)

10 ms-2

5. The distance between two bodies becomes 6 times more than the usual distance, then force becomes

(a)

36 times

(b)

6 times

(c)

12 times

(d)

$\frac{1}{36}$ times

6. Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens

(a)

f

(b)

2f

(c)

infinity

(d)

between f and 2f

7. For air, the refractive index is

(a)

1

(b)

infinity

(c)

0

(d)

1

8. The reciprocal of the focal length of the lens is

(a)

Magnification

(b)

Power

(c)

Principal focus

(d)

None

9. The value of universal gas constant

(a)

3.81 mol–1 K–1

(b)

8.03 mol–1 K–1

(c)

1.38 mol–1 K–1

(d)

8.31 mol–1 K–1

10. SI unit of heat is

(a)

calorie

(b)

joule

(c)

kilo calorie

(d)

kelvin

11. SI unit of resistance is

(a)

mho

(b)

joule

(c)

ohm

(d)

ohm meter

12. According to Ohm's law if voltage increase and resistance stays the same

(a)

Resistance decreases

(b)

Current increases

(c)

Current remains the same

(d)

Current decreases

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

(a)

50 kHz

(b)

20 kHz

(c)

15000 kHz

(d)

10000 kHz

14. Artificial radioactivity was discovered by_____

(a)

Bequerel

(b)

Irene Curie

(c)

Roentgen

(d)

Neils Bohr

15. _____________ aprons are used to protect us from gamma radiations

(a)

(b)

Iron

(c)

(d)

Aluminium

16. Which of the following has the smallest mass?

(a)

6.023 × 1023 atoms of He

(b)

1 atom of He

(c)

2 g of He

(d)

1 mole atoms of He

17. The basis of modern periodic law is__________

(a)

atomic number

(b)

atomic mass

(c)

isotopic mass

(d)

number of neutrons

18. The number of components in a binary solution is _____________

(a)

2

(b)

3

(c)

4

(d)

5

19. Photolysis is a decomposition reaction caused by

(a)

heat

(b)

electricity

(c)

light

(d)

mechanical energy

20. The IUPAC name of an organic compound is 3-Methyl butan-1-ol. What type compound it is?

(a)

Aldehyde

(b)

Carboxylic acid

(c)

Ketone

(d)

Alcohol

21. Which is formed during anaerobic respiration

(a)

Carbohydrate

(b)

Ethyl alcohol

(c)

Acetyl CoA

(d)

Pyruvate

22. Mammals are ______________ animals.

(a)

Cold blooded

(b)

Warm blooded

(c)

Poikilothermic

(d)

All the above

23. The wall of human heart is made of

(a)

Endocardium

(b)

Epicardium

(c)

Myocardium

(d)

All of the above

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

(a)

12, 31

(b)

31, 12

(c)

12, 13

(d)

12, 21

25. LH is secreted by

(a)

(b)

Thyroid gland

(c)

Anterior pituitary

(d)

Hypothalamus.

26. What is true of gametes?

(a)

They are diploid

(b)

(c)

They produce hormones

(d)

27. The number of chromosomes found in human beings are __________________.

(a)

22 pairs of autosomes and 1 pair of allosomes

(b)

22 autosomes and 1 allosome

(c)

46 autosomes

(d)

46 pairs autosomes and 1 pair of allosomes.

28. Paleontologists deal with

(a)

Embryological evidences

(b)

Fossil evidences

(c)

Vestigial organ evidences

(d)

All the above

29. The miracle rice which saved millions of lives and celebrated its 50th birthday is _______.

(a)

IR 8

(b)

IR 24

(c)

Atomita 2

(d)

Ponni

30. Polyphagia is a condition seen in

(a)

Obesity

(b)

Diabetes mellitus

(c)

Diabetes insipidus

(d)

AIDS

31. ____________ is not a symptom of AIDS.

(a)

Increase in number of WBC

(b)

Lack of appetite

(c)

Weight loss

(d)

Swelling of lymph nodes

32. Common energy source in village is

(a)

electricity

(b)

coal

(c)

biogas

(d)

wood and animal dung

33. The project for conservation of_______was launched in 1976

(a)

tiger

(b)

elephant

(c)

lion

(d)

crocodile

34. Where you will create category of blocks?

(a)

Block palette

(b)

(c)

Script area

(d)

sprite

35. Tochoose a block we use__________

(a)

Script area

(b)

(c)

Block palette

(d)

Script Editor