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

10th Standard

Reg.No. :
•
•
•
•
•
•

Science

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

Part A

35 x 1 = 35
1. The unit of ‘g’ is m s-2. It can be also expressed as

(a)

cm s-1

(b)

N kg-1

(c)

N m2 kg-1

(d)

cm2 s-2

2. If two equal forces acting along opposite direction is parallel to each other then they are called as

(a)

resultant

(b)

equilibriant

(c)

like

(d)

unlike

3. The value of g

(a)

increases as we go above the earth's surface

(b)

decreases as we go to the centre of the earth

(c)

remains constant

(d)

is more at equator and less at poles

4. If VB, VG, VR be the velocity of blue, green and red light respectively in a glass prism, then which of the following statement gives the correct relation?

(a)

VB = VG = VR

(b)

VB > VG >VR

(c)

VB < VG < VR

(d)

VB < VG > VR

5. Velocity and wavelength of light are related by a relation

(a)

g-c⋋

(b)

$\gamma =\frac { c }{ \lambda }$

(c)

c=$\gamma$

(d)

both b & c

6. The defect of myopia can be corrected by using

(a)

Concave

(b)

Convex

(c)

Combination of lenses

(d)

None

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. Change in volume of a solid during heating is

(a)

Linear expansion

(b)

Superficial expansion

(c)

Cubical expansion

(d)

apparent expansion

9. Kilowatt hour is the unit of

(a)

resistivity

(b)

conductivity

(c)

electrical energy

(d)

electrical power

10. Give the name of components which is designed to oppose the flow of current.

(a)

Capacitor

(b)

Resistors

(c)

Fuse wire

(d)

Inductor

11. Velocity of sound in the atmosphere of a planet is 500 m s-1. The minimum distance between the sources of sound and the obstacle to hear the echo, should be

(a)

17 m

(b)

20 m

(c)

25 m

(d)

50 m

12. The speed of sound in air is 300 m/s. What is the frequency as heard by the human ear?

(a)

0.001 Hz

(b)

1 Hz

(c)

10,000 Hz

(d)

1,00,000 Hz

13. Proton - Proton chain reaction is an example of__________

(a)

Nuclear fission

(b)

$\alpha$ decay

(c)

Nuclear fusion

(d)

$\beta$ - decay

14. Henry Becquerel discovered ________ in 1896

(a)

nucleus

(b)

atom

(c)

isotopes

(d)

15. The gram molecular mass of oxygen molecule is

(a)

16 g

(b)

18 g

(c)

32 g

(d)

17 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. The volume occupied by 4.4 g of CO2 at STP is:

(a)

22.4l

(b)

2.24l

(c)

0.224l

(d)

0.1l

18. Neon shows zero electron affinity due to _____.

(a)

stable arrangement of neutrons

(b)

stable configuration of electrons

(c)

reduced size

(d)

increased density

19. Noble gases belong to group ___________

(a)

14

(b)

15

(c)

17

(d)

18

20. Deliquescence is due to __________

(a)

Strong affinity to water

(b)

Less affinity to water

(c)

Strong hatred to water

(d)

Inertness to water

21. Under which of the following cases, dissolution of sugar will be rapid?

(a)

Sugar crystal in hot water

(b)

Sugar crystal in cold water

(c)

Powdered sugar in hot water

(d)

Powdered sugar in cold water

22. 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)

23. TFM in soaps represents ___________ content in soap

(a)

mineral

(b)

vitamin

(c)

fatty acid

(d)

carbohydrate

24. Oxygen is produced at what point during photosynthesis ?

(a)

when ATP is converted to ADP

(b)

when CO2 is fixed

(c)

when H2O is splitted

(d)

All of these

25. The body of leech has

(a)

23 segments

(b)

23 segments

(c)

38 segments

(d)

30 segments

26. A patient with blood group O was injured in an accident and has blood loss. Which blood group the doctor should effectively use for transfusion in this condition?

(a)

O group

(b)

AB group

(c)

A or B group

(d)

all blood group

27. Vomiting centre is located in

(a)

medulla oblongata

(b)

stomach

(c)

cerebrum

(d)

hypothalamus

28. Which one is referred as “Master Gland”?

(a)

Pineal gland

(b)

Pituitary gland

(c)

Thyroid gland

(d)

29. The large elongated cells that provide nutrition to developing sperms are

(a)

Primary germ cells

(b)

Sertoli cells

(c)

Leydig cells

(d)

Spermatogonia

30. 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.

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. RDNA is a

(a)

vector DNA

(b)

circular DNA

(c)

recombinant of vector DNA and desired DNA

(d)

satellite DNA

33. Where does alcohol effect immediately after drinking?

(a)

eyes

(b)

auditory region

(c)

liver

(d)

central nervous system

34. A cheap, conventional, commercial and inexhaustible source of energy is

(a)

hydropower

(b)

solar energy

(c)

wind energy

(d)

thermal energy

35. Which is used to edit programs?

(a)

Inkscape

(b)

script editor

(c)

stage

(d)

sprite