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Published on: 05/12/2020
10th Standard Science English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 10
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 + Answers key
Take MCQ Science Test1.
Ethanoic acid turns
red litmus blue
blue litmus red
red litmus green
blue litmus green
2.
______ is the innermost, thin delicate membrane richly supplied with blood.
Durameter
Myelin sheath
Piameter
Arachnoid membrane
3.
The product formed when calcium oxide reacts with water is
Slaked lime
Carbon dioxide
Calcium oxide
Oxygen gas
4.
At constant temperature volume is inversely proportional to pressure of a gas is known as
Boyle's law
Charles
Avogadro
None
5.
U238 is fissionable _________ neutrons.
only by fast
only by slow
both fast and slow
by thermal
6.
A chain reaction is continuous due to
large mass defect
large energy
production of more neutrons in fission
None of these
7.
Hygroscopic substances are used as __________ agents.
oxidizing
reducing
decarboxylating
drying
8.
In compound microscope, as compare to eye piece, objective lens has _____ focal length.
-ve focal length
Zero
Small
Large
9.
The image formed by retina of human eye is
Virtual and erect
Real & inverted
Virtual & inverted
Real & erect
10.
Earthquake produces ______.
Ultrasound
Infrasound
audible sound
none
11.
For air, the refractive index is
1
infinity
0
1
12.
The distance from the centre of the nucleus to the outer most electron in an ion is termed as _________ radii.
atomic
ionic
Covalent
both (b) and (c)
13.
The number of______ increases during allergy.
Basophil
RBC
Eosinophil
Monocyte
14.
The volume occupied by 4.4 g of CO2 at STP is:
22.4l
2.24l
0.224l
0.1l
15.
Choose the correct statement
Nichrome has low resistance and high melting point
Fuse wire has high resistance and low melting point
Nichrome has high resistance and low melting point
Fuse wire has low resistance and high melting point
16.
The physical quantity which is equal to change in momentum is
velocity
acceleration
force
impulse
17.
The atomic number of an element is 12 and its mass number is 24. The number of electrons, protons and neutrons respectively will be
12, 12, 24
24,12,12
12,12,12
12, 24,12
18.
Which of the following laboratory apparatus is used during the verification of Ohm's law?
Voltmeter
Ammeter
Rheostat
All the above
19.
The resistance of a body to change its state of rest is called
inertia of rest
inertia of motion
momentum
inertia of direction
20.
Common energy source in village is
electricity
coal
biogas
wood and animal dung
21.
Identify the exocrine gland
Pituitary gland
Adrenal gland
Salivary gland
Thyroid gland
22.
DNA fingerprinting is based on the principle of identifying _______ sequences of DNA
single stranded
mutated
polymorphic
repetitive
23.
A single highly coiled tube where sperms are stored, get concentrated and mature is known as
Epididymis
Vasa efferentia
Vas deferens
Seminiferous tubules
24.
The best way of direct dating fossils of recent origin is by
Radio-carbon method
Uranium lead method
Potassium-argon method
Both (a) and (c)
25.
Dendrites transmit impulse ______ cell body and axon transmit impulse ______ cell body.
away from, away from
towards, away from
towards, towards
away from, towards
26.
Coronary heart disease is due to
Streptococci bacteria
Inflammation of pericardium
Weakening of heart valves
Insufficient blood supply to heart muscles
27.
During transpiration there is loss of
Carbon dioxide
Oxygen
Water
None of the above
28.
Photolysis is a decomposition reaction caused by __________
heat
electricity
light
mechanical energy
29.
Solubility of NaCl in 100 ml water is 36 g. If 25 g of salt is dissolved in 100 ml of water how much more salt is required for saturation _____________
12g
11g
16g
20g
30.
The process of coating the surface of metal with a thin layer of zinc is called______.
painting
thinning
galvanization
electroplating
31.
Which is formed during anaerobic respiration
Carbohydrate
Ethyl alcohol
Acetyl CoA
Pyruvate
32.
33.
Which of the following are used as an aesthetics?
Carboxylic acids
Ethers
Esters
Aldehydes
34.
Which of the following represents 1 amu?
Mass of a C – 12 atom
Mass of a hydrogen atom
1/12th of the mass of a C – 12 atom
Mass of O – 16 atom
1.
(b)
blue litmus red
2.
(c)
Piameter
3.
(a)
Slaked lime
4.
(a)
Boyle's law
5.
(a)
only by fast
6.
(c)
production of more neutrons in fission
7.
(d)
drying
8.
(c)
Small
9.
(b)
Real & inverted
10.
(b)
Infrasound
11.
(a)
1
12.
(b)
ionic
13.
(c)
Eosinophil
14.
(b)
2.24l
15.
(b)
Fuse wire has high resistance and low melting point
16.
(d)
impulse
17.
(c)
12,12,12
18.
(d)
All the above
19.
(a)
inertia of rest
20.
(d)
wood and animal dung
21.
(c)
Salivary gland
22.
(d)
repetitive
23.
(a)
Epididymis
24.
(a)
Radio-carbon method
25.
(b)
towards, away from
26.
(d)
Insufficient blood supply to heart muscles
27.
(c)
Water
28.
(c)
light
29.
(b)
11g
30.
(c)
galvanization
31.
(b)
Ethyl alcohol
32.
(b)
33.
(b)
Ethers
34.
(c)
1/12th of the mass of a C – 12 atom
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
