10th Standard Syllabus & Materials
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Published on: 05/12/2020
10th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - One
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.
The project for conservation of_______was launched in 1976
tiger
elephant
lion
crocodile
2.
To choose a block we use__________
Script area
Block Menu
Block palette
Script Editor
3.
____________ is not a symptom of AIDS.
Increase in number of WBC
Lack of appetite
Weight loss
Swelling of lymph nodes
4.
SI unit of heat is
calorie
joule
kilo calorie
kelvin
5.
The reciprocal of the focal length of the lens is
Magnification
Power
Principal focus
None
6.
For air, the refractive index is
1
infinity
0
1
7.
The distance between two bodies becomes 6 times more than the usual distance, then force becomes
36 times
6 times
12 times
\(\frac{1}{36}\) times
8.
A force of 20N is acting on an object of mass 10 kg. The acceleration produced is
1 ms-2
2 ms-2
20 ms-2
10 ms-2
9.
The law that gives a qualitative definition of force is _______
Newton's I law
Newton's II law
Newton's III law
Law of gravitation
10.
According to Ohm's law if voltage increase and resistance stays the same
Resistance decreases
Current increases
Current remains the same
Current decreases
11.
The resistance of a body to change its state of motion is called
force
momentum
inertia of motion
inertia of direction
12.
Common energy source in village is
electricity
coal
biogas
wood and animal dung
13.
14.
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.
15.
LH is secreted by
Adrenal gland
Thyroid gland
Anterior pituitary
Hypothalamus.
16.
The miracle rice which saved millions of lives and celebrated its 50th birthday is _______.
IR 8
IR 24
Atomita 2
Ponni
17.
What is true of gametes?
They are diploid
They give rise to gonads
They produce hormones
They are formed from gonads
18.
Paleontologists deal with
Embryological evidences
Fossil evidences
Vestigial organ evidences
All the above
19.
There are ________ pairs of cranial nerves and _______ pairs of spinal nerves.
12, 31
31, 12
12, 13
12, 21
20.
Polyphagia is a condition seen in
Obesity
Diabetes mellitus
Diabetes insipidus
AIDS
21.
The wall of human heart is made of
Endocardium
Epicardium
Myocardium
All of the above
22.
Mammals are ______________ animals.
Cold blooded
Warm blooded
Poikilothermic
All the above
23.
Photolysis is a decomposition reaction caused by __________
heat
electricity
light
mechanical energy
24.
The number of components in a binary solution is _____________
2
3
4
5
25.
The basis of modern periodic law is__________.
atomic number
atomic mass
isotopic mass
number of neutrons
26.
Which is formed during anaerobic respiration
Carbohydrate
Ethyl alcohol
Acetyl CoA
Pyruvate
27.
_____________ aprons are used to protect us from gamma radiations
Lead oxide
Iron
Lead
Aluminium
28.
29.
The IUPAC name of an organic compound is 3-Methyl butan-1-ol. What type compound it is?
Aldehyde
Carboxylic acid
Ketone
Alcohol
30.
The frequency, which is audible to the human ear is
50 kHz
20 kHz
15000 kHz
10000 kHz
31.
Which of the following has the smallest mass?
6.023 × 1023 atoms of He
1 atom of He
2 g of He
1 mole atoms of He
32.
SI unit of resistance is
mho
joule
ohm
ohm meter
33.
The value of universal gas constant
3.81 J mol–1 K–1
8.03 J mol–1 K–1
1.38 J mol–1 K–1
8.31 J mol–1 K–1
34.
Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens
f
2f
infinity
between f and 2f
35.
Impulse is equals to
rate of change of momentum
rate of force and time
change of momentum
rate of change of mass
1.
(d)
crocodile
2.
(c)
Block palette
3.
(a)
Increase in number of WBC
4.
(b)
joule
5.
(b)
Power
6.
(a)
1
7.
(d)
\(\frac{1}{36}\) times
8.
(b)
2 ms-2
9.
(a)
Newton's I law
10.
(b)
Current increases
11.
(c)
inertia of motion
12.
(d)
wood and animal dung
13.
(a)
14.
(a)
22 pairs of autosomes and 1 pair of allosomes.
15.
(c)
Anterior pituitary
16.
(a)
IR 8
17.
(d)
They are formed from gonads
18.
(b)
Fossil evidences
19.
(a)
12, 31
20.
(b)
Diabetes mellitus
21.
(d)
All of the above
22.
(b)
Warm blooded
23.
(c)
light
24.
(a)
2
25.
(a)
atomic number
26.
(b)
Ethyl alcohol
27.
(c)
Lead
28.
(b)
29.
(d)
Alcohol
30.
(b)
20 kHz
31.
(b)
1 atom of He
32.
(c)
ohm
33.
(d)
8.31 J mol–1 K–1
34.
(b)
2f
35.
(c)
change of momentum
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
