10th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Ten | QB365

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

Published on: 05/12/2020

Download Tamil Nadu 10th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 10th Standard - Science

chapter: - Model Question paper

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Questions:

Multiple Choice Question

35 x 1 = 35

______ is essential for Morphogenesis.

(a)

Auxin and Gibberellin

(b)

Ethylene

(c)

Auxin and Cytokinin

(d)

Cytokinin and Abscissic acid

Ethanol is used as ______________

(a)

a preservative for biological specimen

(b)

an antifreeze

(c)

an antiseptic

(d)

all the above

The ______ is the controlling centre of all the body activities.

(a)

heart

(b)

brain

(c)

kidney

(d)

liver

Mass of the fissile material at the critical size is called _______.

(a)

Cut - off mass

(b)

Einstein's mass value

(c)

Curie mass

(d)

Critical mass

If the exposure is about 600 R, it causes __________.

(a)

skin disorder

(b)

hair loss

(c)

teeth loss

(d)

death

_______ rays contain 1 - unit of negative charge.

(a)

Alpha

(b)

Beta

(c)

Gamma

(d)

Hydrogen

In exothermic process as the temperature increases, solubility of the salt is _____________

(a)

decreases

(b)

increases

(c)

no change

(d)

increase and then remains constant

Image formed in simple microscope is

(a)

Erect

(b)

Inverted

(c)

Smaller than object

(d)

Bright

The diameter of eyeball is

(a)

2.3 cm

(b)

23 cm

(c)

2.3 mm

(d)

23 mm

10.

When sound travels through air, the air particles.

(a)

do not vibrate

(b)

vibrate but not in any fixed direction

(c)

vibrate perpendicular to the direction of wave propagation

(d)

vibrate along the direction of wave propagation

11.

The image formation by spherical lenses is due to the phenomenon of

(a)

reflection

(b)

refraction

(c)

interference

(d)

dispersion

12.

A car playing music at a frequency of 250 Hz moves at 20 m/s towards an observer that has frequency. What frequency the observer can hear when
(i) it approaches and
(ii) when it passes by?

(a)

approaching: \(250\times \left( \frac { v+20 }{ v } \right) ;\) leaving: \(\\ 250\times \left( \frac { v-20 }{ v } \right) \)

(b)

approaching: \(\\ 250\times \left( \frac { v }{ v+20 } \right) ;\) leaving: \(250\times \left( \frac { v }{ v-20 } \right) \)

(c)

approaching:\(250\times \left( \frac { v-20 }{ v } \right) ;\) leaving: \(250\times \left( \frac { v+20 }{ v } \right) \)

(d)

approaching: \(250\times \left( \frac { v }{ v-20 } \right) ;\) leaving: \(250\times \left( \frac { v }{ v+20 } \right) \)

13.

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

14.

Normal pulse rate ranges from________

(a)

80-90/min

(b)

70 -90/min

(c)

50 - 60/min

(d)

70 - 80/min

15.

Atomicity of Sulphur is

(a)

(b)

(c)

(d)

16.

Dental formula of rabbit is______

(a)

\(\cfrac { 2033 }{ 1023 } \)

(b)

\(\cfrac { 2003 }{ 1003 } \)

(c)

\(\cfrac { 2030 }{ 1020 } \)

(d)

\(\cfrac { 2023 }{ 1220 } \)

17.

The expression for the heat is

(a)

H = VIt

(b)

H = I²Rt

(c)

\(H=\frac { { V }^{ 2 } }{ R } t\)

(d)

all the above

18.

According to the Newton's III law of motion, action & reaction

(a)

always act on the same body

(b)

have same magnitude & direction

(c)

always act in opposite directions

(d)

act on either body at normal to each other

19.

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

20.

Kilowatt - hour is the unit of

(a)

Power

(b)

Potential difference

(c)

Force

(d)

Electrical energy

21.

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

22.

Which software is used to create animation?

(a)

Paint

(b)

PDF

(c)

MS Word

(d)

Scratch

23.

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.

24.

Asexual reproduction takes place through budding in ___________

(a)

Amoeba

(b)

Yeast

(c)

Plasmodium

(d)

Bacteria

25.

The term Ethnobotany was coined by

(a)

Khorana

(b)

J.W. Harshberger

(c)

Ronald Ross

(d)

Hugo de Vries

26.

Vomiting centre is located in

(a)

medulla oblongata

(b)

stomach

(c)

cerebrum

(d)

hypothalamus

27.

Which of the following process requires energy?

(a)

Active transport

(b)

Diffusion

(c)

Osmosis

(d)

All of them

28.

A single displacement reaction is represented by X_(s) + 2HCl_(aq) → XCl_2(aq) + H_2(g). Which of the following(s) could be X. (i) Zn (ii) Ag (iii) Cu (iv) Mg. Choose the best pair.

(a)

i and ii

(b)

ii and iii

(c)

iii and iv

(d)

i and iv

29.

Deliquescence is due to __________

(a)

Strong affinity to water

(b)

Less affinity to water

(c)

Strong hatred to water

(d)

Inertness to water

30.

The process of coating the surface of metal with a thin layer of zinc is called______.

(a)

painting

(b)

thinning

(c)

galvanization

(d)

electroplating

31.

Kreb’s cycle takes place in

(a)

chloroplast

(b)

mitochondrial matrix

(c)

stomata

(d)

inner mitochondrial membrane

32.

Which of the following is/are correct?
i. Chain reaction takes place in a nuclear reactor and an atomic bomb.
ii. The chain reaction in a nuclear reactor is controlled
iii. The chain reaction in a nuclear reactor is not controlled
iv. No chain reaction takes place in an atom bomb

(a)

(i) only correct

(b)

(i) & (ii) are correct

(c)

(iv) only correct

(d)

(iii) & (iv) are correct

33.

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

(a)

95.5 %

(b)

75.5 %

(c)

55.5 %

(d)

45.5 %

34.

1 mole of any substance contains __________ molecules

(a)

6.023 × 10²³

(b)

6.023 × 10^-23

(c)

3.0115 × 10²³

(d)

12.046 × 10²³

35.

One kilogram force equals to

(a)

9.8 dyne

(b)

9.8 × 10⁴ N

(c)

98 × 10⁴ dyne

(d)

980 dyne

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Answers Key:

Multiple Choice Question

35 x 1 = 35

(d)
all the above

(b)
brain

(d)
Critical mass

(d)
death

(b)
Beta

(a)
decreases

(a)
Erect

(a)
2.3 cm

10.

(d)
vibrate along the direction of wave propagation

11.

(b)
refraction

12.

(d)
approaching: \(250\times \left( \frac { v }{ v-20 } \right) ;\) leaving: \(250\times \left( \frac { v }{ v+20 } \right) \)

13.

(d)
both b & c

14.

(b)
70 -90/min

15.

(d)
8

16.

(b)
\(\cfrac { 2003 }{ 1003 } \)

17.

(d)
all the above

18.

19.

(d)
Diatomic and mono atomic

20.

(d)
Electrical energy

21.

(a)
Newton's I law

22.

(d)
Scratch

23.

(a)
22 pairs of autosomes and 1 pair of allosomes.

24.

(b)
Yeast

25.

(b)
J.W. Harshberger

26.

(a)
medulla oblongata

27.

(a)
Active transport

28.

(d)
i and iv

29.

(a)
Strong affinity to water

30.

31.

(b)
mitochondrial matrix

32.

(b)
(i) & (ii) are correct

33.

(a)
95.5 %

34.

(a)
6.023 × 10²³

35.

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