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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 - 6
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.
Premature shedding is caused by ______
auxin
ethylene
ABA
gibberellin
2.
According to IUPAC rules, the secondary suffix used to represent carboxylic acids is _________________.
al
ol
ate
oic
3.
Cyton is also called cell body or ______
axon
perikaryon
neuroglia
neuron
4.
5.
An element 'A' on exposure to moist air turns to form compound 'B' which is reddish brown. Identify 'A' and 'B'.
'A' is Ag, 'B' is Ag2s
'A' is Cu, 'B' is CuO
'A' is Mg, 'B' is MgO
'A' is Fe, 'B' is Fe2O3
6.
Order of temperature of fusion reaction is ________kelvin.
1017
107
1010
103
7.
Radio ________ is used in the treatment of cancer.
sodium
cobalt
iron
phosphorous
8.
9.
Objective of telescope is of
Short focal length & short aperture
Short focal length & large aperture
Large focal length & large aperture
Large focal length & short aperture
10.
When a person uses a convex lens as a simple magnifying glass, the object must be placed at a distance
less than one focal length
more than one focal length
less than twice focal length
more than twice the focal length
11.
What does it mean when a wave's amplitude increases?
Its frequency also increases
It is moving in denser medium
Its wavelength gets longer
It carries more energy
12.
The splitting up of white light into colours is called
reflection
refraction
scattering
dispersion
13.
Which options show the correct direction of current?
14.
Electronegativity values are based on ______________
bond energy
electron affinity
ionisation energy
all the above
15.
Two chambered heart is seen in__________
fish
amphibian
reptiles
mammals
16.
Atomicity of Sulphur is
1
2
4
8
17.
The force of gravitation between two bodies in the universe does not depend on
the distance between them
the product of their masses
the sum of their masses
the gravitational constituent
18.
19.
If the resistance in a series circuit doubles, total current will be
doubles
halved
same
Increases
20.
An ice skater pushes harder with his leg muscles, he begins to move faster. This is an example of
Newton's I law
Newton's II law
Newton's III law
Law of conservation
21.
A parallel circuit consist of three resistors with values of 430, 210 and 100. The total resistance is
0.017 ohm
58.82 ohm
58.82 kilo ohm
None of the above
22.
The resistance of a body to change its state of motion is called
force
momentum
inertia of motion
inertia of direction
23.
We can cut the DNA with the help of
scissors
restriction endonucleases
knife
RNAase
24.
A single highly coiled tube where sperms are stored, get concentrated and mature is known as
Epididymis
Vasa efferentia
Vas deferens
Seminiferous tubules
25.
Paleontologists deal with
Embryological evidences
Fossil evidences
Vestigial organ evidences
All the above
26.
Node of Ranvier is found in
muscles
axons
dendrites
cyton
27.
Cancer of the epithelial cells is called
Leukemia
Sarcoma
Carcinoma
Lipoma
28.
‘Heart of Heart’ is called
SA node
AV node
Purkinje fibres
Bundle of His
29.
Which of the following represents a precipitation reaction?
A(s) + B(s) → C(s) + D(s)
A(s) + B(aq) → C(aq) + D(l)
A(aq) + B(aq) → C(s) + D(aq)
A(aq) + B(s) → C(aq) + D(l)
30.
Identify the non aqueous solution.
sodium chloride in water
glucose in water
copper sulphate in water
sulphur in carbon di sulphide
31.
Kreb’s cycle takes place in
chloroplast
mitochondrial matrix
stomata
inner mitochondrial membrane
32.
Rectified spirit is an aqueous solution which contains about _______ of ethanol
95.5 %
75.5 %
55.5 %
45.5 %
33.
Power of a lens is –4D, then its focal length is
4m
–40m
–0.25 m
–2.5 m
34.
1.
(b)
ethylene
2.
(d)
oic
3.
(b)
perikaryon
4.
(b)
5.
(d)
'A' is Fe, 'B' is Fe2O3
6.
(b)
107
7.
(b)
cobalt
8.
(b)
9.
(c)
Large focal length & large aperture
10.
(a)
less than one focal length
11.
(d)
It carries more energy
12.
(d)
dispersion
13.
(b)
14.
(d)
all the above
15.
(a)
fish
16.
(d)
8
17.
(c)
the sum of their masses
18.
(b)
19.
(b)
halved
20.
(b)
Newton's II law
21.
(b)
58.82 ohm
22.
(c)
inertia of motion
23.
(b)
restriction endonucleases
24.
(a)
Epididymis
25.
(b)
Fossil evidences
26.
(b)
axons
27.
(c)
Carcinoma
28.
(a)
SA node
29.
(c)
A(aq) + B(aq) → C(s) + D(aq)
30.
(d)
sulphur in carbon di sulphide
31.
(b)
mitochondrial matrix
32.
(a)
95.5 %
33.
(c)
–0.25 m
34.
(c)
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards