10th Standard Science One Mark Impatant Questions Book Back and Creative -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.

Questions:

Multiple Choice Question

98 x 1 = 98

Medical waste is disposed by________

(a)

Sanitary land fill

(b)

Incineration

(c)

Composting

(d)

Segregation

The Chipko movement originated in_________

(a)

Uttar pradesh

(b)

Uttarakhand

(c)

Arunachal Pradesh

(d)

Madhya Pradesh

Multiple files are stored in a ___________.

(a)

Script Editor

(b)

Paint

(c)

Notepad

(d)

Folder

The output of any application is commonly known as______

(a)

File

(b)

Folder

(c)

Disk

(d)

Output

Sexually abused children show symptoms of ______________

(a)

frequent urinary infection

(b)

headache

(c)

sore head

(d)

migraine

______________ is not related to NIDDM.

(a)

Insulin administration

(b)

Controlled by medicine

(c)

Obese

(d)

Insulin action impaired

DNA finger printing was developed by

(a)

Dr. Ian Wilmut

(b)

Alec Jeffrey

(c)

Lilly

(d)

Dr. Norman

In human beings, _________ of the DNA base sequences are the same and this is called as bulk genomic DNA.

(a)

99%

(b)

50%

(c)

90%

(d)

70%

Dwarfism is caused by decreased secretion of ______ in children.

(a)

(b)

FSH

(c)

GTH

(d)

ACTH

10.

_____ promotes the ripening of fruits.

(a)

Auxin

(b)

Abscisic Acid

(c)

Ethylene

(d)

Cytokinin

11.

_____ is a natural Auxin.

(a)

Phenyl Acetic Acid

(b)

Indole 3 Butyric Acid

(c)

α - Naphthalene Acetic Acid

(d)

Indole - 3- Propionic Acid

12.

______ is a growth inhibitor.

(a)

Auxin

(b)

(c)

Cytokinin

(d)

Ethylene

13.

Ethanol is used as ______________

(a)

a preservative for biological specimen

(b)

an antifreeze

(c)

an antiseptic

(d)

all the above

14.

Chemical formula of acetaldehyde is _________________.

(a)

CH₃CHO

(b)

CH₃CH₂OH

(c)

CH₃COOCH₃

(d)

CH₃-O-CH₃

15.

Charles Darwin was a great __________.

(a)

Chemist

(b)

Naturalist

(c)

Doctor

(d)

Physicist

16.

Radioactive Carbon (C¹⁴) dating method was discovered by_________.

(a)

W.F.Libby

(b)

Niels Bohr

(c)

Issac Newton

(d)

William Harvey

17.

_________ or sediments fill the hollow depression and forms a cast.

(a)

Rocks

(b)

Sand

(c)

Soil

(d)

Minerals

18.

Ancon sheep is an example of _________.

(a)

vestigial organ

(b)

discontinuous variation

(c)

acquired character

(d)

natural selection

19.

Biogenesis was speculated by _________.

(a)

Oparin

(b)

Louis Pasteur

(c)

Haldane

(d)

All the above

20.

Each neuron can transmit ______ nerve impulses per second.

(a)

(b)

1000

(c)

10,000

(d)

1,00,000

21.

The cytoplasm has granular body called _______

(a)

nissl's granules

(b)

nerve fibres

(c)

glial cells

(d)

nerve cells

22.

Ionic product of water is expressed

(a)

K_w = [Hp⁺] [OH^-]

(b)

K_w = [H⁺] [OH^-]

(c)

both (a) and (b)

(d)

neither (a) nor (b)

23.

Which of the following information is not conveyed by a balanced chemical equation?

(a)

Physical states of reactants and products

(b)

Symbols and chemicals formula of reactants and products

(c)

Number of atoms / molecules of the reactants and products formed

(d)

Feasibility of a chemical reaction

24.

Charles's law is also called as ______

(a)

the law of temperature

(b)

the law of pressure

(c)

the law of volume

(d)

the law of gas

25.

At what temperature are Celsius and Fahrenheit equal

(a)

40°

(b)

-40°

(c)

0⁰

(d)

100°

26.

_________ are used to control the chain reaction.

(a)

Control rods

(b)

Moderators

(c)

Coolants

(d)

Neutron source

27.

In controlled chain reactions, the number of fission producing neutron is ___________

(a)

indefinite

(b)

finite and a variable

(c)

a constant

(d)

iodine

28.

Which of the following is a dehydrating agent (absorbs moisture)

(a)

sodium hydroxide

(b)

anhydrous calcium chloride

(c)

sugar

(d)

None of these

29.

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

30.

Simple microscope consists of

(a)

Short focal length convex

(b)

Large focal length of concave

(c)

Short focal length of concave

(d)

Large focal length of convex

31.

An object is placed 25 cm from a convex lens whose focal length is 10 cm. The image distance is _______ cm.

(a)

(b)

16.66

(c)

6.66

(d)

32.

Sound travels with a speed of 330 ms^-1. What is the wavelength of sound whose frequency is 550 Hz?

(a)

0.6 m

(b)

0.7 m

(c)

0.4 m

(d)

0.2 m

33.

Before playing guitar, guitarist adjust the tension and pluck the string. By doing so, he is adjusting.

(a)

intensity of sound only

(b)

amplitude

(c)

frequency

(d)

loudness of sound

34.

________is a gene mutation

(a)

Deletion

(b)

Duplication

(c)

Translocation

(d)

Ploidy

35.

Choose the correct pair

(a)

A ≡ T

(b)

G ≡ A

(c)

A ≡ C

(d)

G ≡ C

36.

Electronegativity values of Na and CI are 0.9 and 3.0 respectively predict the nature of bonding.

(a)

Ionic

(b)

Covalent

(c)

Coordinate

(d)

Metallic

37.

Potassium belongs to ________ period

(a)

First

(b)

Second

(c)

Third

(d)

Fourth

38.

_______from the posterior pituitary stimulates the uterine contractions

(a)

Oxytocin

(b)

Insulin

(c)

Estrogen

(d)

Prolactin

39.

The process of spermatogenesis takes place in the___________

(a)

Sertolicel cells

(b)

Seminiferous tubules

(c)

Leydigcells

(d)

Centrioles

40.

_______from anterior pituitary stimulates milk secretion

(a)

Oxytocin

(b)

Prolactin

(c)

Progestrone

(d)

Oestrogen

41.

There are_________ polar nuclei in the embryo sac

(a)

(b)

(c)

(d)

42.

Fragmentation is seen in_________

(a)

Spirogyra

(b)

Bryophyllum

(c)

Yeast

(d)

Hydra

43.

The other name of red blood corpuscles is _________

(a)

erythrocytes

(b)

leucocytes

(c)

granulocytes

(d)

agranulocytes

44.

By active transport _________moves into the cells where it is utilised or stored.

(a)

glucose

(b)

sucrose

(c)

fructose

(d)

water

45.

PNS is formed of _______pairs of cranial nerves in Rabbit

(a)

(b)

(c)

(d)

46.

Leeches may grow to a length of________

(a)

35 cm

(b)

45 cm

(c)

25 cm

(d)

20 cm

47.

The formula of a chloride of a metal M is MCl₃the formula of the phosphate of metal M will be:

(a)

MPO₄

(b)

M₂PO₄

(c)

M₃PO₄

(d)

2 (PO₄)₃

48.

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

49.

You're riding a bike when suddenly you hit a large rock. The bike stops moving but you fly over the handle - bars. This is an example of ______

(a)

Newton's I law

(b)

Newton's II law

(c)

Newton's III law

(d)

Law of conservation

50.

What happens when ammeter connected in parallel?

(a)

Open circuited

(b)

Closed Circuited

(c)

Short circuited

(d)

None of the above

51.

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

(a)

Capacitor

(b)

Resistors

(c)

Fuse wire

(d)

Inductor

52.

The physical quantity which is the measure of inertia is _______

(a)

density

(b)

weight

(c)

force

(d)

mass

53.

Common energy source in village is

(a)

electricity

(b)

coal

(c)

biogas

(d)

wood and animal dung

54.

An inexhaustible resources is

(a)

wind power

(b)

soil fertility

(c)

wild life

(d)

all of the above

55.

Where you will create category of blocks?

(a)

Block palette

(b)

Block menu

(c)

Script area

(d)

sprite

56.

Which is used to build scripts?

(a)

Script area

(b)

Block palette

(c)

stage

(d)

sprite

57.

Okasaki fragments are joined together by ___________________.

(a)

Helicase

(b)

DNA polymerase

(c)

RNA primer

(d)

DNA ligase

58.

The _____________ units form the backbone of the DNA.

(a)

5 Carbon sugar

(b)

Phosphate

(c)

Nitrogenous bases

(d)

Sugar phosphate

59.

The hormone which has positive effect on apical dominance is:

(a)

Cytokinin

(b)

Auxin

(c)

Gibberellin

(d)

Ethylene

60.

Gibberellins cause:

(a)

Shortening of genetically tall plants

(b)

Elongation of dwarf plants

(c)

Promotion of rooting

(d)

Yellowing of young leaves

61.

rDNA is a

(a)

vector DNA

(b)

circular DNA

(c)

recombinant of vector DNA and desired DNA

(d)

satellite DNA

62.

Which method of crop improvement can be practiced by a farmer if he is inexperienced?

(a)

clonal selection

(b)

mass selection

(c)

pureline selection

(d)

hybridisation

63.

The large elongated cells that provide nutrition to developing sperms are

(a)

Primary germ cells

(b)

Sertoli cells

(c)

Leydig cells

(d)

Spermatogonia

64.

Male gametes in angiosperms are formed by the division of ___________

(a)

Generative cell

(b)

Vegetative cell

(c)

Microspore mother cell

(d)

Microspore

65.

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

(a)

Radio-carbon method

(b)

Uranium lead method

(c)

Potassium-argon method

(d)

Both (a) and (c)

66.

Biogenetic law states that ___________

(a)

Ontogeny and phylogeny go together

(b)

Ontogeny recapitulates phylogeny

(c)

Phylogeny recapitulates ontogeny

(d)

There is no relationship between phylogeny and ontogeny

67.

Nerve cells do not possess

(a)

neurilemma

(b)

sarcolemma

(c)

axon

(d)

dendrites

68.

The neurons which carries impulse from the central nervous system to the muscle fibre.

(a)

afferent neurons

(b)

association neurons

(c)

efferent neurons

(d)

unipolar neurons

69.

Cancer of the epithelial cells is called

(a)

Leukemia

(b)

Sarcoma

(c)

Carcinoma

(d)

Lipoma

70.

Cancer cells are more easily damaged by radiations than normal cells because they are

(a)

Different in structure

(b)

Non dividing

(c)

Mutated Cells

(d)

Undergoing rapid division

71.

Which one of the following shows correct composition of blood?

(a)

Plasma - Blood + Lymphocyte

(b)

Serum - Blood + Fibrinogen

(c)

Lymph - Plasma + RBC + WBC

(d)

Blood - Plasma + RBC + WBC + Platelets

72.

‘Heart of Heart’ is called

(a)

SA node

(b)

AV node

(c)

Purkinje fibres

(d)

Bundle of His

73.

The body of leech has

(a)

23 segments

(b)

33 segments

(c)

38 segments

(d)

30 segments

74.

Pharyngeal ganglion in leech is a part of

(a)

Excretory system

(b)

Nervous system

(c)

Reproductive system

(d)

Respiratory system

75.

Which of the following statements are correct about a chemical equilibrium?
(i) It is dynamic in nature
(ii) The rate of the forward and backward reactions are equal at equilibrium
(iii) Irreversible reactions do not attain chemical equilibrium
(iv) The concentration of reactants and products may be different

(a)

i, ii and iii

(b)

i, ii and iv

(c)

ii, iii and iv

(d)

i, iii and iv

76.

Photolysis is a decomposition reaction caused by __________

(a)

heat

(b)

electricity

(c)

light

(d)

mechanical energy

77.

Which of the following is hygroscopic in nature?

(a)

ferric chloride

(b)

copper sulphate pentahydrate

(c)

silica gel

(d)

none of the above

78.

A solution is a __________ mixture.

(a)

homogeneous

(b)

heterogeneous

(c)

homogeneous and heterogeneous

(d)

non homogeneous

79.

Which of the following have inert gases 2 electrons in the outermost shell.

(a)

(b)

(c)

(d)

80.

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

(a)

painting

(b)

thinning

(c)

galvanization

(d)

electroplating

81.

The xylem and phloem arranged side by side on same radius is called _________

(a)

radial

(b)

amphivasal

(c)

conjoint

(d)

None of these

82.

The endarch condition is the characteristic feature of

(a)

root

(b)

stem

(c)

leaves

(d)

flower

83.

In which of the following, no change in mass number of the daughter nuclei takes place
i) \(\alpha\) decay
ii) \(\beta\) decay
iii) \(\gamma \) decay
iv) neutron decay

(a)

(i) is correct

(b)

(ii) and (iii) are correct

(c)

(i) & ( iv) are correct

(d)

(ii) & (iv) are correct

84.

Man-made radioactivity is also known as ___________.

(a)

Induced radioactivity

(b)

Spontaneous radioactivity

(c)

Artificial radioactivity

(d)

a & c

85.

Which of the following are used as an aesthetics?

(a)

Carboxylic acids

(b)

Ethers

(c)

Esters

(d)

Aldehydes

86.

The secondary suffix used in IUPAC nomenclature of an aldehyde is ____

(a)

- ol

(b)

– oic acid

(c)

– al

(d)

- one

87.

Velocity of sound in a gaseous medium is 330 ms^-1. If the pressure is increased by 4 times without causing a change in the temperature, the velocity of sound in the gas is

(a)

330 ms^-1

(b)

660 ms^-1

(c)

156 ms^-1

(d)

990 ms^-1

88.

When a sound wave travels through air, the air particles

(a)

vibrate along the direction of the wave motion

(b)

vibrate but not in any fixed direction

(c)

vibrate perpendicular to the direction of the wave motion

(d)

do not vibrate

89.

In the nucleus of₂₀Ca⁴⁰, there are

(a)

20 protons and 40 neutrons

(b)

20 protons and 20 neutrons

(c)

20 protons and 40 electrons

(d)

40 protons and 20 electrons

90.

Which of the following is a triatomic molecule?

(a)

Glucose

(b)

Helium

(c)

Carbon dioxide

(d)

Hydrogen

91.

SI unit of resistance is

(a)

mho

(b)

joule

(c)

ohm

(d)

ohm meter

92.

Which of the following is correct?

(a)

Rate of change of charge is electrical power

(b)

Rate of change of charge is current.

(c)

Rate of change of energy is current.

(d)

Rate of change of current is charge.

93.

In the Given diagram, the possible direction of heat energy transformation is

(a)

A\(\leftarrow\)B, A\(\leftarrow\)C, B\(\leftarrow\)C

(b)

A\(\rightarrow\)B, A\(\rightarrow\)C, B\(\rightarrow\)C

(c)

A\(\rightarrow\)B, A\(\leftarrow\)C, B\(\rightarrow\)C

(d)

A\(\leftarrow\)B, A\(\rightarrow\)C, B\(\leftarrow\)C

94.

If a substance is heated or cooled, the change in mass of that substance is

(a)

positive

(b)

negative

(c)

zero

(d)

none of the above

95.

If V_B, V_G, V_R 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)

V_B = V_G = V_R

(b)

V_B> V_G >V_R

(c)

V_B < V_G < V_R

(d)

V_B< V_G > V_R

96.

Magnification of a convex lens is

(a)

Positive

(b)

negative

(c)

either positive or negative

(d)

zero

97.

The unit of ‘g’ is m s^-2. It can be also expressed as ______.

(a)

cms^-1

(b)

Nkg^-1

(c)

Nm²kg^-1

(d)

cm²s^-2

98.

Inertia of a body depends on

(a)

weight of the object

(b)

acceleration due to gravity of the planet

(c)

mass of the object

(d)

Both a & b

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Answers Key:

Multiple Choice Question

98 x 1 = 98

(b)
Incineration

(b)
Uttarakhand

(d)
Folder

(a)
File

(a)
frequent urinary infection

(a)
Insulin administration

(b)
Alec Jeffrey

(a)
99%

(a)
GH

10.

11.

(a)
Phenyl Acetic Acid

12.

(d)
Ethylene

13.

(d)
all the above

14.

(a)
CH₃CHO

15.

(b)
Naturalist

16.

(a)
W.F.Libby

17.

(d)
Minerals

18.

(b)
discontinuous variation

19.

(b)
Louis Pasteur

20.

(b)
1000

21.

(a)
nissl's granules

22.

(b)
K_w = [H⁺] [OH^-]

23.

(d)
Feasibility of a chemical reaction

24.

25.

(b)
-40°

26.

(a)
Control rods

27.

28.

(b)
anhydrous calcium chloride

29.

(a)
decreases

30.

(a)
Short focal length convex

31.

(b)
16.66

32.

(a)
0.6 m

33.

34.

(a)
Deletion

35.

(d)
G ≡ C

36.

(a)
Ionic

37.

(d)
Fourth

38.

(a)
Oxytocin

39.

(b)
Seminiferous tubules

40.

(b)
Prolactin

41.

(a)
2

42.

(a)
Spirogyra

43.

(a)
erythrocytes

44.

(a)
glucose

45.

(b)
12

46.

(a)
35 cm

47.

(a)
MPO₄

48.

(d)
Diatomic and mono atomic

49.

(a)
Newton's I law

50.

51.

(b)
Resistors

52.

(d)
mass

53.

(d)
wood and animal dung

54.

(d)
all of the above

55.

(a)
Block palette

56.

(a)
Script area

57.

(d)
DNA ligase

58.

(d)
Sugar phosphate

59.

(b)
Auxin

60.

(b)
Elongation of dwarf plants

61.

62.

(b)
mass selection

63.

(b)
Sertoli cells

64.

(a)
Generative cell

65.

(a)
Radio-carbon method

66.

(b)
Ontogeny recapitulates phylogeny

67.

(b)
sarcolemma

68.

69.

70.

(d)
Undergoing rapid division

71.

(d)
Blood - Plasma + RBC + WBC + Platelets

72.

(a)
SA node

73.

(b)
33 segments

74.

(b)
Nervous system

75.

(b)
i, ii and iv

76.

77.

78.

(a)
homogeneous

79.

(a)
He

80.

81.

82.

(b)
stem

83.

(b)
(ii) and (iii) are correct

84.

(d)
a & c

85.

(b)
Ethers

86.

87.

(a)
330 ms^-1

88.

(a)
vibrate along the direction of the wave motion

89.

(b)
20 protons and 20 neutrons

90.

91.

92.

(b)
Rate of change of charge is current.

93.

(a)
A\(\leftarrow\)B, A\(\leftarrow\)C, B\(\leftarrow\)C

94.

95.

96.

97.

(b)
Nkg^-1

98.

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