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Published on: 05/12/2020
10th Standard Science English Medium Free Online Test Book Back 1 Mark Questions with Answer Key Part - 2
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.
Global warming will cause
raise in level of oceans
melting of glaciers
sinking of islands
all of these
2.
Okasaki fragments are joined together by ___________________.
Helicase
DNA polymerase
RNA primer
DNA ligase
3.
LH is secreted by
Adrenal gland
Thyroid gland
Anterior pituitary
Hypothalamus.
4.
Himgiri developed by hybridisation and selection for disease resistance against rust pathogens is a variety of _______.
chilli
maize
sugarcane
wheat
5.
Male gametes in angiosperms are formed by the division of ___________
Generative cell
Vegetative cell
Microspore mother cell
Microspore
6.
Which nervous band connects the two cerebral hemispheres of brain?
thalamus
hypothalamus
corpus callosum
pons
7.
Cancer cells are more easily damaged by radiations than normal cells because they are
Different in structure
Non dividing
Mutated Cells
Undergoing rapid division
8.
Which is the correct sequence of blood flow
Ventricle → atrium → vein → arteries
Atrium → ventricle → veins → arteries
Atrium → ventricle → arteries → vein
Ventricles → vein → atrium → arteries
9.
Mammals are ______________ animals.
Cold blooded
Warm blooded
Poikilothermic
All the above
10.
Powdered CaCO3 reacts more rapidly than flaky CaCO3 because of __________.
large surface area
high pressure
high concentration
high temperature
11.
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
12.
Chemical formula of rust is ________.
FeO.xH2O
FeO4.xH2O
Fe2O3.xH2O
FeO
13.
Kreb’s cycle takes place in
chloroplast
mitochondrial matrix
stomata
inner mitochondrial membrane
14.
_____________ aprons are used to protect us from gamma radiations
Lead oxide
Iron
Lead
Aluminium
15.
Rectified spirit is an aqueous solution which contains about _______ of ethanol
95.5 %
75.5 %
55.5 %
45.5 %
16.
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
17.
Mass of 1 mole of Nitrogen atom is
28 amu
14 amu
28 g
14 g
18.
In a simple circuit, why does the bulb glow when you close the switch?
The switch produces electricity
Closing the switch completes the circuit.
Closing the switch breaks the circuit.
The bulb is getting charged.
19.
20.
1.
(d)
all of these
2.
(d)
DNA ligase
3.
(c)
Anterior pituitary
4.
(d)
wheat
5.
(a)
Generative cell
6.
(c)
corpus callosum
7.
(d)
Undergoing rapid division
8.
(c)
Atrium → ventricle → arteries → vein
9.
(b)
Warm blooded
10.
(a)
large surface area
11.
(b)
11g
12.
(c)
Fe2O3.xH2O
13.
(b)
mitochondrial matrix
14.
(c)
Lead
15.
(a)
95.5 %
16.
(c)
25 m
17.
(d)
14 g
18.
(b)
Closing the switch completes the circuit.
19.
(d)
20.
(d)
10th Standard Syllabus & Materials
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards