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Published on: 05/12/2020
10th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Three
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.
Change in volume of a solid during heating is
Linear expansion
Superficial expansion
Cubical expansion
apparent expansion
2.
3.
Under which of the following cases, dissolution of sugar will be rapid?
Sugar crystal in hot water
Sugar crystal in cold water
Powdered sugar in hot water
Powdered sugar in cold water
4.
The defect of myopia can be corrected by using
Concave
Convex
Combination of lenses
None
5.
The speed of sound in air is 300 m/s. What is the frequency as heard by the human ear?
0.001 Hz
1 Hz
10,000 Hz
1,00,000 Hz
6.
Velocity and wavelength of light are related by a relation
g-c⋋
\(\gamma =\frac { c }{ \lambda } \)
c=\(\gamma \)⋋
both b & c
7.
Noble gases belong to group ___________
14
15
17
18
8.
The volume occupied by 4.4 g of CO2 at STP is:
22.4l
2.24l
0.224l
0.1l
9.
10.
Atomicity of Chlorine and Neon is
Mono atomic and mono atomic
Mono atomic and diatomic
Diatomic and diatomic
Diatomic and mono atomic
11.
If two equal forces acting along opposite direction is parallel to each other then they are called as
resultant
equilibrant
like
unlike
12.
Give the name of components which is designed to oppose the flow of current.
Capacitor
Resistors
Fuse wire
Inductor
13.
A cheap, conventional, commercial and inexhaustible source of energy is
hydropower
solar energy
wind energy
thermal energy
14.
Which is used to edit programs?
Inkscape
script editor
stage
sprite
15.
The number of chromosomes found in human beings are __________________.
22 pairs of autosomes and 1 pair of allosomes.
22 autosomes and 1 allosome
46 autosomes
46 pairs autosomes and 1 pair of allosomes.
16.
Which one is referred as “Master Gland”?
Pineal gland
Pituitary gland
Thyroid gland
Adrenal gland
17.
rDNA is a
vector DNA
circular DNA
recombinant of vector DNA and desired DNA
satellite DNA
18.
The large elongated cells that provide nutrition to developing sperms are
Primary germ cells
Sertoli cells
Leydig cells
Spermatogonia
19.
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)
20.
Vomiting centre is located in
medulla oblongata
stomach
cerebrum
hypothalamus
21.
Where does alcohol effect immediately after drinking?
eyes
auditory region
liver
central nervous system
22.
A patient with blood group O was injured in an accident and has blood loss. Which group of blood should be used by doctor for transfusion?
O group
AB group
A and B group
All blood group
23.
The body of leech has
23 segments
33 segments
38 segments
30 segments
24.
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)
25.
Deliquescence is due to __________
Strong affinity to water
Less affinity to water
Strong hatred to water
Inertness to water
26.
Neon shows zero electron affinity due to _____.
stable arrangement of neutrons
stable configuration of electrons
reduced size
increased density
27.
Oxygen is produced at what point during photosynthesis ?
when ATP is converted to ADP
when CO2 is fixed
when H2O is splitted
All of these
28.
Proton - Proton chain reaction is an example of__________
Nuclear fission
\(\alpha\) - decay
Nuclear fusion
\(\beta\) - decay
29.
TFM in soaps represents ___________ content in soap
mineral
vitamin
fatty acid
carbohydrate
30.
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
17 m
20 m
25 m
50 m
31.
The gram molecular mass of oxygen molecule is
16 g
18 g
32 g
17 g
32.
Kilowatt hour is the unit of
resistivity
conductivity
electrical energy
electrical power
33.
Temperature is the average ______ of the molecules of a substance
difference in K.E and P.E
sum of P.E and K.E
difference in T.E and P.E
difference in K.E and T.E
34.
If VB, VG, VR be the velocity of blue, green and red light respectively in a glass prism, then which of the following statement gives the correct relation?
VB = VG = VR
VB > VG >VR
VB < VG < VR
VB < VG > VR
35.
The unit of ‘g’ is m s-2. It can be also expressed as ______.
cms-1
Nkg-1
Nm2kg-1
cm2s-2
1.
(c)
Cubical expansion
2.
(a)
3.
(c)
Powdered sugar in hot water
4.
(a)
Concave
5.
(c)
10,000 Hz
6.
(d)
both b & c
7.
(d)
18
8.
(b)
2.24l
9.
(b)
10.
(d)
Diatomic and mono atomic
11.
(d)
unlike
12.
(b)
Resistors
13.
(a)
hydropower
14.
(b)
script editor
15.
(a)
22 pairs of autosomes and 1 pair of allosomes.
16.
(b)
Pituitary gland
17.
(c)
recombinant of vector DNA and desired DNA
18.
(b)
Sertoli cells
19.
(a)
Radio-carbon method
20.
(a)
medulla oblongata
21.
(d)
central nervous system
22.
(a)
O group
23.
(b)
33 segments
24.
(c)
A(aq) + B(aq) → C(s) + D(aq)
25.
(a)
Strong affinity to water
26.
(b)
stable configuration of electrons
27.
(c)
when H2O is splitted
28.
(c)
Nuclear fusion
29.
(c)
fatty acid
30.
(c)
25 m
31.
(c)
32 g
32.
(c)
electrical energy
33.
(c)
difference in T.E and P.E
34.
(c)
VB < VG < VR
35.
(b)
Nkg-1
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