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Published on: 05/12/2020
10th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Eight
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.
Exarch and tetrarch xylem are a feature of ___________.
dicot stem
dicot leaf
monocot root
dicot root
2.
General molecular formula of alkynes is ___________.
CnH2n+2
CnH2n
CnH2-n-2
CnH2n+1
3.
The plasma membrane of axon is called _____
axolemma
axoplasm
myelin sheath
schwann cells
4.
Decomposition reactions are brought about by ________
heat
light
electricity
all the above
5.
Change in volume of a solid during heating is
Linear expansion
Superficial expansion
Cubical expansion
apparent expansion
6.
The moderator used in nuclear reactor is
Cadmium
Boron oxide
Heavy water
Uranium
7.
__________ is fissionable by neutrons of all energies.
U235
U238
U239
Np239
8.
Complete the reaction: 90Th234⟶ 91Pa234+ ?
2He4
-1e0
1e0
1n0
9.
Energy generation in stars is due to
chemical reaction
fission
fusion of light nuclei
Fusion of heavy nuclei
10.
The pitch of sound depends on
frequency
amplitude
both
none
11.
The group of rays is ______
lines
dots
beam
none of these
12.
Which options show the correct direction of current?
13.
Blister copper contains _________
50% pure copper
99% pure copper and 1% impurities
98% pure copper and 2% impurities
75% pure copper and 25% impurities
14.
Modern periodic table contains ______ groups.
9
32
18
64
15.
16.
The volume occupied by 4.4 g of CO2 at STP is:
22.4l
2.24l
0.224l
0.1l
17.
18.
Which of the following correctly represent 360 g of water
(i) 2 moles of H2O
(ii) 20 moles of water
(iii) 6.023 x 1023 molecules of water
(iv) 1.2046 x 1024 molecules of water
(i)
(i) and (iv)
(ii) and (iii)
(ii) and (iv)
19.
Which of following relation is correct for voltage, work done and charge?
V = W x Q
W = V x Q
V = Q 1W
W = V / Q
20.
Mass of an electron is
9.1083 x 10-31kg
9.1083 x 10-24kg
1.67262 x 10-27kg
1.67 x 10-24gm
21.
The resistance of a conductor directly proportional to
Length
Area
Volt
Current
22.
The resistance of a body to change its state of rest is called
inertia of rest
inertia of motion
momentum
inertia of direction
23.
Soil erosion can be prevented by
deforestation
afforestation
over growing
removal of vegetation
24.
Male gametes in angiosperms are formed by the division of ___________
Generative cell
Vegetative cell
Microspore mother cell
Microspore
25.
Paleontologists deal with
Embryological evidences
Fossil evidences
Vestigial organ evidences
All the above
26.
Vomiting centre is located in
medulla oblongata
stomach
cerebrum
hypothalamus
27.
World 'No Tobacco Day' is observed on
May 31
June 6
April 22
October 2
28.
Which is the correct sequence of blood flow
Ventricle → atrium → vein → arteries
Atrium → ventricle → veins → arteries
Atrium → ventricle → arteries → vein
Ventricles → vein → atrium → arteries
29.
Photolysis is a decomposition reaction caused by __________
heat
electricity
light
mechanical energy
30.
Kreb’s cycle takes place in
chloroplast
mitochondrial matrix
stomata
inner mitochondrial membrane
31.
_____________ aprons are used to protect us from gamma radiations
Lead oxide
Iron
Lead
Aluminium
32.
The secondary suffix used in IUPAC nomenclature of an aldehyde is ____
- ol
– oic acid
– al
- one
33.
The volume occupied by 1 mole of a diatomic gas at S.T.P is
11.2 liters
5.6 liters
22.4 liters
44.8 liters
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.
Newton’s III law is applicable
for a body is at rest
for a body in motion
both a & b
only for bodies with equal masses
1.
(d)
dicot root
2.
(c)
CnH2-n-2
3.
(a)
axolemma
4.
(d)
all the above
5.
(c)
Cubical expansion
6.
(c)
Heavy water
7.
(a)
U235
8.
(b)
-1e0
9.
(c)
fusion of light nuclei
10.
(a)
frequency
11.
(c)
beam
12.
(b)
13.
(c)
98% pure copper and 2% impurities
14.
(c)
18
15.
(d)
16.
(b)
2.24l
17.
(b)
18.
(d)
(ii) and (iv)
19.
(b)
W = V x Q
20.
(a)
9.1083 x 10-31kg
21.
(a)
Length
22.
(a)
inertia of rest
23.
(b)
afforestation
24.
(a)
Generative cell
25.
(b)
Fossil evidences
26.
(a)
medulla oblongata
27.
(a)
May 31
28.
(c)
Atrium → ventricle → arteries → vein
29.
(c)
light
30.
(b)
mitochondrial matrix
31.
(c)
Lead
32.
(c)
– al
33.
(c)
22.4 liters
34.
(c)
VB < VG < VR
35.
(c)
both a & b
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
