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Published on: 05/12/2020
10th Standard Science English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 7
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.
Ethanoic acid turns
red litmus blue
blue litmus red
red litmus green
blue litmus green
2.
_____ is called Stress hormone.
Auxin
Gibberellin
Cytokinin
ABA
3.
The _____ is the second largest part of the brain.
cerebrum
medulla
cerebellum
pons
4.
When Zinc metal is placed in hydrochloric acid, the gas evolved is _________________
CO
CO2
H2
H2O
5.
Absolute scale is also called as ______
Kelvin scale
Celsius scale
Centigrade scale
Fahrenheit scale
6.
Which of the following has the fastest process of heat transfer?
Conduction
convection
Radiation
all the above
7.
Atom bomb explosions produce ______ waves.
gravitational
sand
shock
electric
8.
Positively charged radioactive rays are called _________ rays.
∝
β
૪
neutral
9.
The solubility of gases in liquid increases with ____________
increased volume
increased pressure
decreased pressure
none of these
10.
The phenomena of light responsible for the working of the human eye is
Reflection
Refraction
Power
Accommodation
11.
If the energy of the incident and scattered beam of light are same, then it is called ______ scattering
Ray light
Inelastic
Mie
Elastic
12.
Ultrasound waves compared to audible sound waves have.
Lower frequency and Shorter wavelength
Lower frequency and longer wavelength
higher frequency and longer wavelength
higher frequency and shorter wavelength
13.
________is a gene mutation
Deletion
Duplication
Translocation
Ploidy
14.
_______from anterior pituitary stimulates milk secretion
Oxytocin
Prolactin
Progestrone
Oestrogen
15.
The number of______ increases during allergy.
Basophil
RBC
Eosinophil
Monocyte
16.
The vapor density of the Helium gas is
Equal to 1
Less than 1
Greater than 1
0
17.
Which of the following produces large joule heating effect?
1A current through 2Ω resister for 3 seconds
1A current through 3Ω resistor for 2 seconds
2A current through 1Ω resistor for 2 seconds
3A current through 1Ω resistor for 1 second
18.
A lift of mass 1000 kg which is moving with an acceleration of 1 ms-2 in upward direction, then the tension developed in string which is connected to lift is
10,000 N
10,800 N
9800 N
11000 N
19.
The resultant of action & reaction forces is ______
greater than zero
less than zero
zero
ore
20.
The relative atomic masses of many elements are not whole number because
they are not determined accurately
they exist as isotopes
due to impurities
atoms ionize
21.
The resistance of a conductor is inversely proportional to its _______.
Volt
Length
Area
None of the above
22.
Opening a door is an example of _______
a non contact force
contact force
balanced
unbalanced
23.
All files are stored in the _____________
Folder
box
Pai
scanner
24.
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.
25.
To increase the sugar production in sugarcanes they are sprayed with _______
Auxin
Cytokinin
Gibberellins
Ethylene
26.
Excessive consumption of alcohol leads to
Loss of memory
Cirrhosis of liver
State of hallucination
Suppression of brain function
27.
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
28.
The chemical equation Na2SO4(aq) + BaCl2(aq) → BaSO4(s)↓ + 2NaCl(aq) represents which of the following types of reaction?
Neutralisation
Combustion
Precipitation
Single displacement
29.
Neon shows zero electron affinity due to _____.
stable arrangement of neutrons
stable configuration of electrons
reduced size
increased density
30.
The xylem and phloem arranged side by side on same radius is called _________
radial
amphivasal
conjoint
None of these
31.
____________ isotope is used for the treatment of cancer.
Radio Iodine
Radio Cobalt
Radio Carbon
Radio Nickel
32.
Mass of 1 mole of Nitrogen atom is
28 amu
14 amu
28 g
14 g
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.
1.
(b)
blue litmus red
2.
(d)
ABA
3.
(c)
cerebellum
4.
(c)
H2
5.
(a)
Kelvin scale
6.
(c)
Radiation
7.
(c)
shock
8.
(a)
∝
9.
(b)
increased pressure
10.
(b)
Refraction
11.
(d)
Elastic
12.
(d)
higher frequency and shorter wavelength
13.
(a)
Deletion
14.
(b)
Prolactin
15.
(c)
Eosinophil
16.
(c)
Greater than 1
17.
(d)
3A current through 1Ω resistor for 1 second
18.
(b)
10,800 N
19.
(c)
zero
20.
(b)
they exist as isotopes
21.
(c)
Area
22.
(b)
contact force
23.
(a)
Folder
24.
(a)
22 pairs of autosomes and 1 pair of allosomes.
25.
(c)
Gibberellins
26.
(b)
Cirrhosis of liver
27.
(a)
O group
28.
(c)
Precipitation
29.
(b)
stable configuration of electrons
30.
(c)
conjoint
31.
(b)
Radio Cobalt
32.
(d)
14 g
33.
(c)
difference in T.E and P.E
34.
(d)
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
