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Published on: 05/12/2020
10th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Six
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.
Chemically rust is
hydrated ferrous oxide
Ferrous oxide
hydrated ferric oxide
Ferric oxide
2.
SI unit of heat is
calorie
joule
kilo calorie
kelvin
3.
Minimum size of a system in which at least 1 neutron is available for further fission is called________.
cut - off size
critical size
range of reactor
capability criteria
4.
૪ rays are ________ in charge.
positive
negative
neutral
none
5.
Which of the following factors affect solubility?
temperature
pressure
nature of solute and solvent
all the above
6.
When a person is myopic, he / she can clearly see
Both nearby & far off
Only nearby objects
Only far off objects
Neither nearby nor far off objects
7.
A source emits a frequency of 1 kHz is moving toward a rest listener with a speed of 0.9 V, where V is the speed of sound wave. The frequency heard by the listener is ________.
10 Hz
0.1 Hz
100 Hz
10 kHz
8.
The group of rays is ______
lines
dots
beam
none of these
9.
Which statement is true?
Sound waves can propagate as longitudinal or transverse depending on the transmitting medium.
Sound waves are transverse and they propagate perpendicular to the transmitting medium.
Sound waves are longitudinal waves and they propagate parallel to the transmitting medium.
Sound waves can propagate as longitudinal or transverse depending on the temperature.
10.
Modern periodic table contains ______ groups.
9
32
18
64
11.
The ovaries of leech lies in the ________segment.
10th
11th
13th
15th
12.
What happens to current and resistance if the voltage is doubled?
Current doubles and resistance doubles
Current doubles and resistance is halved
Current remains the same and resistance doubles
Current doubles and resistance remains the same
13.
According to Ohm's law if voltage increase and resistance stays the same
Resistance decreases
Current increases
Current remains the same
Current decreases
14.
The momentum of a heavy object at rest will be
large
infinity
zero
small
15.
Which of the following statement is wrong with respect to wind energy
wind energy is a renewable energy
the blades of wind mill are operated with the help of electric motor
production of wind energy is pollution free
usage of wind energy can reduce the consumption of fossil fuels.
16.
Which of the following is / are a fossil fuel?
i. Tar
ii. Coal
iii. Petroleum
i only
i only ii
ii and iii
i, ii and iii
17.
18.
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.
19.
Which organ acts as both exocrine gland as well as endocrine gland
Pancreas
Kidney
Liver
Lungs
20.
DNA fingerprinting is based on the principle of identifying _______ sequences of DNA
single stranded
mutated
polymorphic
repetitive
21.
A single highly coiled tube where sperms are stored, get concentrated and mature is known as
Epididymis
Vasa efferentia
Vas deferens
Seminiferous tubules
22.
Nerve cells do not possess
neurilemma
sarcolemma
axon
dendrites
23.
‘Heart of Heart’ is called
SA node
AV node
Purkinje fibres
Bundle of His
24.
The animals which give birth to young ones are
Oviparous
Viviparous
Ovoviviparous
All the above
25.
A single displacement reaction is represented by X(s) + 2HCl(aq) → XCl2(aq) + H2(g). Which of the following(s) could be X. (i) Zn (ii) Ag (iii) Cu (iv) Mg. Choose the best pair.
i and ii
ii and iii
iii and iv
i and iv
26.
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
27.
Neon shows zero electron affinity due to _____.
stable arrangement of neutrons
stable configuration of electrons
reduced size
increased density
28.
Kreb’s cycle takes place in
chloroplast
mitochondrial matrix
stomata
inner mitochondrial membrane
29.
Kamini reactor is located at __________
Kalpakkam
Koodankulam
Mumbai
Rajasthan
30.
Unit of radioactivity is _____________
roentgen
curie
becquerel
all the above
31.
Which of the following are used as an aesthetics?
Carboxylic acids
Ethers
Esters
Aldehydes
32.
In the nucleus of 20Ca40, there are
20 protons and 40 neutrons
20 protons and 20 neutrons
20 protons and 40 electrons
40 protons and 20 electrons
33.
Kilowatt hour is the unit of
resistivity
conductivity
electrical energy
electrical power
34.
In a myopic eye, the image of the object is formed
behind the retina
on the retina
in front of the retina
on the blind spot
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)
hydrated ferric oxide
2.
(b)
joule
3.
(b)
critical size
4.
(c)
neutral
5.
(d)
all the above
6.
(b)
Only nearby objects
7.
(d)
10 kHz
8.
(c)
beam
9.
(c)
Sound waves are longitudinal waves and they propagate parallel to the transmitting medium.
10.
(c)
18
11.
(b)
11th
12.
(d)
Current doubles and resistance remains the same
13.
(b)
Current increases
14.
(c)
zero
15.
(b)
the blades of wind mill are operated with the help of electric motor
16.
(c)
ii and iii
17.
(a)
18.
(a)
22 pairs of autosomes and 1 pair of allosomes.
19.
(a)
Pancreas
20.
(d)
repetitive
21.
(a)
Epididymis
22.
(b)
sarcolemma
23.
(a)
SA node
24.
(b)
Viviparous
25.
(d)
i and iv
26.
(b)
11g
27.
(b)
stable configuration of electrons
28.
(b)
mitochondrial matrix
29.
(a)
Kalpakkam
30.
(d)
all the above
31.
(b)
Ethers
32.
(b)
20 protons and 20 neutrons
33.
(c)
electrical energy
34.
(c)
in front of the retina
35.
(b)
Nkg-1
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
