Updated 10th Standard Science Study Materials 2024 - 2025Exams

10th Standard Science English Medium Book back Important 1 Marks Questions Question Bank Software May-11 , 2020

10th Standard Science English Medium Book back Important 1 Marks Questions

Bookback Important 1 Marks Questions

10th Standard

Science

Time : 01:00:00 Hrs

Total Marks : 150

Part A

69 x 1 = 69

The mass of a body is measured on planet Earth as M kg. When it is taken to a planet of radius half that of the Earth then its value will be ____kg

(a)

4 M

(b)

2 M

(c)

M/4

(d)

If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will

(a)

decrease by 50%

(b)

increase by 50%

(c)

decrease by 25%

(d)

increase by 300%

To project the rockets which of the following principle(s) is /(are) required?

(a)

Newton’s third law of motion

(b)

Newton’s law of gravitation

(c)

law of conservation of linear momentum

(d)

both a and c

The refractive index of four substances A, B, C and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in

(a)

(b)

(c)

(d)

A small bulb is placed at the principal focus of a convex lens. When the bulb is switched on, the lens will produce

(a)

a convergent beam of light

(b)

a divergent beam of light

(c)

a parallel beam of light

(d)

a coloured beam of light

Which of the following lens would you prefer to use while reading small letters found in a dictionary?

(a)

A convex lens of focal length 5 cm

(b)

A concave lens of focal length 5 cm

(c)

A convex lens of focal length 10 cm

(d)

A concave lens of focal length 10 cm

The value of universal gas constant

(a)

3.81 J mol^–1 K^–1

(b)

8.03 J mol^–1 K^–1

(c)

1.38 J mol^–1 K^–1

(d)

8.31 J mol^–1K^–1

If a substance is heated or cooled, the linear expansion occurs along the axis of

(a)

X or –X

(b)

Y or –Y

(c)

both (a) and (b)

(d)

(a) or (b)

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

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.

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.

Kilowatt hour is the unit of

(a)

resistivity

(b)

conductivity

(c)

electrical energy

(d)

electrical power

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

The velocity of sound in air at a particular temperature is 330 ms^-1. What will be its value when temperature is doubled and the pressure is halved?

(a)

330 ms^-1

(b)

165 ms^-1

(c)

330 x \(\sqrt { 2 } \) ms^-1

(d)

320/\(\sqrt { 2 } \) ms^-1

Velocity of sound in the atmosphere of a planet is 500 ms^-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

Man-made radioactivity is also known as ___________.

(a)

Induced radioactivity

(b)

Spontaneous radioactivity

(c)

Artificial radioactivity

(d)

a & c

Gamma radiations are dangerous because

(a)

it affects eyes & bones

(b)

it affects tissues

(c)

it produces genetic disorder

(d)

it produces enormous amount of heat

Kamini reactor is located at __________

(a)

Kalpakkam

(b)

Koodankulam

(c)

Mumbai

(d)

Rajasthan

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

The gram molecular mass of oxygen molecule is

(a)

16 g

(b)

18 g

(c)

32 g

(d)

17 g

1 mole of any substance contains __________ molecules

(a)

6.023 × 10²³

(b)

6.023 × 10^-23

(c)

3.0115 × 10²³

(d)

12.046 × 10²³

The basis of modern periodic law is__________.

(a)

atomic number

(b)

atomic mass

(c)

isotopic mass

(d)

number of neutrons

_____ is a relative periodic property.

(a)

atomic radii

(b)

ionic radii

(c)

electron affinity

(d)

electronegativity

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

(a)

painting

(b)

thinning

(c)

galvanization

(d)

electroplating

A solution is a __________ mixture.

(a)

homogeneous

(b)

heterogeneous

(c)

homogeneous and heterogeneous

(d)

non homogeneous

Which of the following is the universal solvent?

(a)

Acetone

(b)

Benzene

(c)

Water

(d)

Alcohol

Which of the following is hygroscopic in nature?

(a)

ferric chloride

(b)

copper sulphate pentahydrate

(c)

silica gel

(d)

none of the above

H_2(g) + Cl_29(g) → 2HCl_(g) is a

(a)

Decomposition Reaction

(b)

Combination Reaction

(c)

Single Displacement Reaction

(d)

Double Displacement Reaction

Which of the following is not an “element + element → compound” type reaction?

(a)

C_(s) + O_2(g) → CO_2(g)

(b)

2K_(s) + Br_2(l) → 2KBr_(s)

(c)

2CO_(g) + O_2(g) → 2CO_2(g)

(d)

4Fe_(s) + 3O_2(g) → 2Fe₂O_3(s)

The pH of a solution is 3. Its [OH^–] concentration is

(a)

1 × 10^–3 M

(b)

(c)

1 × 10^–11 M

(d)

11 M

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

(a)

- ol

(b)

– oic acid

(c)

– al

(d)

- one

C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O is a

(a)

Reduction of ethanol

(b)

Combustion of ethanol

(c)

Oxidation of ethanoic acid

(d)

Oxidation of ethanal

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

(a)

95.5 %

(b)

75.5 %

(c)

55.5 %

(d)

45.5 %

The endarch condition is the characteristic feature of

(a)

root

(b)

stem

(c)

leaves

(d)

flower

Which is formed during anaerobic respiration

(a)

Carbohydrate

(b)

Ethyl alcohol

(c)

Acetyl CoA

(d)

Pyruvate

Kreb’s cycle takes place in

(a)

chloroplast

(b)

mitochondrial matrix

(c)

stomata

(d)

inner mitochondrial membrane

The segments of leech are known as

(a)

Metameres (somites)

(b)

Proglottids

(c)

Strobila

(d)

All the above

The body of leech has

(a)

23 segments

(b)

33 segments

(c)

38 segments

(d)

30 segments

The animals which give birth to young ones are

(a)

Oviparous

(b)

Viviparous

(c)

Ovoviviparous

(d)

All the above

Active transport involves

(a)

Movement of molecules from lower to higher concentrations

(b)

Expenditure of energy

(c)

It is an uphill task

(d)

All of the above

During transpiration there is loss of

(a)

Carbon dioxide

(b)

Oxygen

(c)

Water

(d)

None of the above

‘Heart of Heart’ is called

(a)

SA node

(b)

AV node

(c)

Purkinje fibres

(d)

Bundle of His

Bipolar neurons are found in

(a)

retina of eye

(b)

cerebral cortex

(c)

embryo

(d)

respiratory epithelium

The outer most of the three cranial meninges is

(a)

arachnoid membrane

(b)

piamater

(c)

duramater

(d)

myelin sheath

Vomiting centre is located in

(a)

medulla oblongata

(b)

stomach

(c)

cerebrum

(d)

hypothalamus

The hormone which has positive effect on apical dominance is:

(a)

Cytokinin

(b)

Auxin

(c)

Gibberellin

(d)

Ethylene

Avena coleoptile test was conducted by

(a)

Darwin

(b)

N. Smit

(c)

Paal

(d)

F.W. Went

To increase the sugar production in sugarcanes they are sprayed with _______

(a)

Auxin

(b)

Cytokinin

(c)

Gibberellins

(d)

Ethylene

The plant which propagates with the help of its leaves is ___________

(a)

Onion

(b)

Neem

(c)

Ginger

(d)

Bryophyllum

Syngamy results in the formation of____________

(a)

Zoospores

(b)

Conidia

(c)

Zygote

(d)

Chlamydospores

A single highly coiled tube where sperms are stored, get concentrated and mature is known as

(a)

Epididymis

(b)

Vasa efferentia

(c)

Vas deferens

(d)

Seminiferous tubules

9 : 3 : 3 : 1 ratio is due to

(a)

Segregation

(b)

Crossing over

(c)

Independent assortment

(d)

Recessiveness

The _____________ units form the backbone of the DNA.

(a)

5 Carbon sugar

(b)

Phosphate

(c)

Nitrogenous bases

(d)

Sugar phosphate

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.

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

The ‘use and disuse theory’ was proposed by __________.

(a)

Charles Darwin

(b)

Ernst Haeckel

(c)

Jean Baptiste Lamarck

(d)

Gregor Mendel

Paleontologists deal with

(a)

Embryological evidences

(b)

Fossil evidences

(c)

Vestigial organ evidences

(d)

All the above

Which of the following is used to produce products useful to humans by biotechnology techniques?

(a)

enzyme from organism

(b)

live organism

(c)

vitamins

(d)

both (a) and (b)

We can cut the DNA with the help of

(a)

scissors

(b)

restriction endonucleases

(c)

knife

(d)

RNAase

In a hexaploid wheat( 2n = 6 x = 42 ) the haploid (n) and the basic(x) number of chromosomes respectively are

(a)

n = 7 and x = 21

(b)

n = 21 and x = 21

(c)

n = 7 and x = 7

(d)

n = 21 and x = 7

Excessive consumption of alcohol leads to

(a)

Loss of memory

(b)

Cirrhosis of liver

(c)

State of hallucination

(d)

Suppression of brain function

Cancer of the epithelial cells is called

(a)

Leukemia

(b)

Sarcoma

(c)

Carcinoma

(d)

Lipoma

Where does alcohol effect immediately after drinking?

(a)

eyes

(b)

auditory region

(c)

liver

(d)

central nervous system

Soil erosion is more where there is

(a)

no rainfall

(b)

low rainfall

(c)

rainfall is high

(d)

none of these

Common energy source in village is

(a)

electricity

(b)

coal

(c)

biogas

(d)

wood and animal dung

Which of the following statement is wrong with respect to wind energy

(a)

wind energy is a renewable energy

(b)

the blades of wind mill are operated with the help of electric motor

(c)

production of wind energy is pollution free

(d)

usage of wind energy can reduce the consumption of fossil fuels.

All files are stored in the _____________

(a)

Folder

(b)

box

(c)

Pai

(d)

scanner

Which is used to build scripts?

(a)

Script area

(b)

Block palette

(c)

stage

(d)

sprite

Which is used to edit programs?

(a)

Inkscape

(b)

script editor

(c)

stage

(d)

sprite

Part B

44 x 1 = 44

Passengers lean forward when sudden brake is applied in a moving vehicle. This can be explained by ___________

___________ is used to change the speed of car.

The path of the light is called as_____________

Amount of light entering into the eye is controlled by________

The value of Avogadro number ________

According to Boyle’s law, the shape of the graph between pressure and reciprocal of volume is ______.

When a circuit is open, _____________ cannot pass through it.

The ratio of the potential difference to the current is known as ________.

A whistle giving out a sound of frequency 450 Hz, approaches a stationary observer at a speed of 33 ms^–1. The frequency heard by the observer is (speed of sound = 330 ms^–1) ______.

A source of sound is travelling with a velocity 40 km/h towards an observer and emits a sound of frequency 2000 Hz. If the velocity of sound is 1220 km/h, then the apparent frequency heard by the observer is ___________.

The average energy released in each fusion reaction is about ________ J.

If the radiation exposure is 100 R, it may cause ______________.

Atoms of different elements having _______ mass number, but ________ atomic numbers are called isobars.

Relative atomic mass is otherwise known as __________

The scientist who propounded the modern periodic law is ________.

________ and ________ are called inner transition elements

Solubility is the amount of solute dissolved in _____ g of solvent.

Volume percentage decreases with increases in temperature because _____.

Electrolysis is type of _______________ reaction

The number of products formed in a synthesis reaction is _________

(Saturated / Unsaturated) ___________ compounds decolourize bromine water.

The alkaline hydrolysis of fatty acids is termed as _____________

Glycolysis takes place in ________.

The source of O₂ liberated in photosynthesis is __________

The posterior sucker is formed by the fusion of the ___________ segments

The anterior end of leech has a lobe-like structure called _____________.

__________ involves evaporative loss of water from aerial parts.

Water enters into the root hair cell through __________ membrane.

The two antagonistic component of autonomic nervous system are ______ and __________.

_________ maintains the constant pressure inside the cranium.

Gibberellins induce stem elongation in ______ plants.

The hormone which has negative effect on apical dominance is _________.

Planaria reproduces asexually by ___________

The implantation of the embryo occurs at about ___________ day of fertilization

The pairs of contrasting character (traits) of Mendel are called_________.

Physical expression of a gene is called _________.

The degenerated and non-functional organs found in an organism are called ______________.

The forelimbs of bat and human are examples of ______________ organs.

__________ cells are undifferentiated mass of cells.

In gene cloning the DNA of interest is integrated in a __________.

A highly poisonous chemicals derived from tobacco is _____________

Insulin resistance is a condition in ______________diabetes mellitus.

Removal of soil particles from the land is called ______________.

______________ is the most commonly used fuel for the production of electricity.

Part C

44 x 1 = 44

Newton’s I law

(1)

Bacillus thuringienesis

Law of conservation of Linear momentum

(2)

2 moles

Retina

(3)

Single Displacement

Hypermetropia

(4)

Acromegaly

Cubical expansion

(5)

Potassium stearate

Heat transformation

(6)

ampere

electric current

(7)

hot body to cold body

electrical power

(8)

watt

Echo

(9)

Absence of antigen

Ultrasonic

(10)

energy saving

BARC

(11)

Neutralization

Fuel

(12)

4 moles

4 g of H₂

(13)

change in volume

112 g of N₂

(14)

Release of egg from Graafian follicle

Redox reaction

(15)

Simple goitre

Dental filling

(16)

Blue vitriol

(17)

Excessive thirst

Deliquescence

(18)

Build scripts

NH₄OH_(aq) + CH₃COOH_(aq) → CH₃COONH_4(aq) + H₂O_(l)

(19)

non - renewable energy

Zn_(s)+ CuSO_4(aq)→ ZnSO_4(aq) + Cu_(s)

(20)

NaOH

Functional group –OH

(21)

Radiocarbon dating

Soap

(22)

Aluminothermic process

Amphivasal

(23)

Translocation of food

Phloem

(24)

Dracaena

Leucopenia

(25)

Mumbai

O blood group

(26)

Duration between pregnancy and birth

Hypothalamus

(27)

Screen of the eye

Cerebellum

(28)

CuSO₄.5H₂O

Thyroxine

(29)

Ultrasonography

Growth hormone

(30)

stable equilibrium of a body

Gestation

(31)

Hindbrain

Ovulation

(32)

Edit programs

Autosomes

(33)

Semi-dwarf Rice

Diploid condition

(34)

Lack of blood flow to heart muscle

Atavism

(35)

Decrease in leucocytes

W.F. Libby

(36)

Forebrain

IR 8

(37)

Alcohol

Bt toxin

(38)

silver-tin amalgam

Polydipsia

(39)

Rudimentary tail and thick hair on the body

Myocardial Infarction

(40)

uranium

Natural gas

(41)

near point moves away

CFL bulbs

(42)

22 kHz

Script Area

(43)

22 pairs of chromosome

Costume editor

(44)

propulsion of a rocket

*****************************************

Answers

(c)

M/4

(c)

decrease by 25%

(d)

both a and c

(a)

(c)

a parallel beam of light

(a)

A convex lens of focal length 5 cm

(d)

8.31 J mol^–1K^–1

(d)

(a) or (b)

(c)

difference in T.E and P.E

(b)

Rate of change of charge is current.

(b)

Closing the switch completes the circuit.

(c)

electrical energy

(a)

330 ms^-1

(c)

330 x \(\sqrt { 2 } \) ms^-1

(c)

25 m

(d)

a & c

(c)

it produces genetic disorder

(a)

Kalpakkam

(b)

20 protons and 20 neutrons

(c)

32 g

(a)

6.023 × 10²³

(a)

atomic number

(d)

electronegativity

(c)

galvanization

(a)

homogeneous

(c)

Water

(c)

silica gel

(b)

Combination Reaction

(c)

2CO_(g) + O_2(g) → 2CO_2(g)

(c)

1 × 10^–11 M

(c)

– al

(b)

Combustion of ethanol

(a)

95.5 %

(b)

stem

(b)

Ethyl alcohol

(b)

mitochondrial matrix

(a)

Metameres (somites)

(b)

33 segments

(b)

Viviparous

(d)

All of the above

(c)

Water

(a)

SA node

(a)

retina of eye

(c)

duramater

(a)

medulla oblongata

(b)

Auxin

(d)

F.W. Went

(c)

Gibberellins

(d)

Bryophyllum

(c)

Zygote

(a)

Epididymis

(c)

Independent assortment

(d)

Sugar phosphate

(a)

22 pairs of autosomes and 1 pair of allosomes.

(b)

Ontogeny recapitulates phylogeny

(c)

Jean Baptiste Lamarck

(b)

Fossil evidences

(d)

both (a) and (b)

(b)

restriction endonucleases

(d)

n = 21 and x = 7

(b)

Cirrhosis of liver

(c)

Carcinoma

(d)

central nervous system

(c)

rainfall is high

(d)

wood and animal dung

(b)

the blades of wind mill are operated with the help of electric motor

(a)

Folder

(a)

Script area

(b)

script editor

inertia of motion

Acceleration

ray of light

Iris

6.023 x 10²³/ mol

straight line

current

resistance

500 Hz

2067 Hz

3.84 x 10^-12 J

Leukemia

same, different

standard atomic weight

Hendry Moseley

Lanthanides, Actinides

100

of expansion of liquids

decomposition

one

Unsaturated

Saponification

cytoplasm

water(H₂O)

seven

anterior sucker (or) oral sucker

Transpiration

Semi-permeable

sympathetic and parasympathetic systems

cerebrospinal fluid

Rice

cytokinins

Regeneration

6 to 7^th

Alleles

Phenotype

vestigial organs

homologous

Stem

Suitable vector (Plasmid)

Nicotin

Type -2 non-insulin dependent

soil erosion

Coal

stable equilibrium of a body

propulsion of a rocket

Screen of the eye

near point moves away

change in volume

hot body to cold body

ampere

watt

Ultrasonography

22 kHz

Mumbai

uranium

2 moles

4 moles

Aluminothermic process

silver-tin amalgam

CuSO₄.5H₂O

NaOH

Neutralization

Single Displacement

Alcohol

Potassium stearate

Dracaena

Translocation of food

Decrease in leucocytes

Absence of antigen

Forebrain

Hindbrain

Simple goitre

Acromegaly

Duration between pregnancy and birth

Release of egg from Graafian follicle

22 pairs of chromosome

Rudimentary tail and thick hair on the body

Radiocarbon dating

Semi-dwarf Rice

Bacillus thuringienesis

Excessive thirst

Lack of blood flow to heart muscle

non - renewable energy

energy saving

Build scripts

Edit programs

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