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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 - 5
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.
Medical waste is disposed by________
Sanitary land fill
Incineration
Composting
Segregation
2.
Which button is presses to run the script?
Green flag
Red flag
Blue flag
Yellow flag
3.
World AIDS Day is observed on ______________
1st December
15th December
24th November
1st May
4.
In human beings, _________ of the DNA base sequences are the same and this is called as bulk genomic DNA.
99%
50%
90%
70%
5.
Ethyl alcohol is mainly manufactured by
destructive distillation of wood
fermentation of molasses
dehydrogenation
Oxidation of ethane in the presence of K2Cr2O7/H+
6.
_____ is also called as Stress hormone.
Auxin
Abscisic Acid
Ethylene
Cytokinin
7.
Radioactive Carbon (C14) dating method was discovered by_________.
W.F.Libby
Niels Bohr
Issac Newton
William Harvey
8.
________ is not an example of vestigial organ.
Coccyx
Appendix
Thick hair
Nictitating membrane
9.
______ is the largest portion nearly two - third of the brain.
Thalamus
Cerebrum
Diencephalon
Cerebellum
10.
Pick out
Compound + element ⟶ compound type of combination reaction
PCl5 ⟶ PCl3 + Cl2
Mg + O2 ⟶ 2MgO
PCl3 + Cl2 ⟶ PCl5
2Na + Cl2 ⟶ 2NaCl
11.
At constant temperature volume is inversely proportional to pressure of a gas is known as
Boyle's law
Charles
Avogadro
None
12.
Elements having atomic number greater than ________ are radioactive.
48
68
88
83
13.
Lens formula is
\(\frac { { h }^{ 1 } }{ h } \)
\(\frac { 1 }{ f } =\frac { 1 }{ v } -\frac { 1 }{ u } \)
\(\frac { v }{ u } \)
\((\mu -1)\left( \frac { 1 }{ { R }_{ 1 } } -\frac { 1 }{ { R }_{ 2 } } \right) \)
14.
Red light is used in traffic signals because
It has highest wavelength
disperses least
red is symbol of danger
both a & b
15.
The speed of sound in air is 300 m/s. What is the frequency as heard by the human ear?
0.001 Hz
1 Hz
10,000 Hz
1,00,000 Hz
16.
Electronegativity values are based on ______________
bond energy
electron affinity
ionisation energy
all the above
17.
________is a disc shaped structure.
Uterus
Placenta
Ovary
Sperm
18.
After fertilization the _________disintegrates.
Ovule
Polar nuclei
Antipodals
Endosperm
19.
___________is the main circulatory medium in the human body.
Blood
Water
Lymph
Plasma
20.
The_______ on both sides join to form the genital atrium in leech.
ejaculatory ducts
epididymis
sperm Vesicle
vas efferens
21.
22.
23.
Why battery is used in the circuit?
Measure Current
Maintain a potential difference
Oppose the current
Measure potential
24.
25.
Common energy source in village is
electricity
coal
biogas
wood and animal dung
26.
Pusa Komal is a disease resistant variety of _________.
sugarcane
rice
cow pea
maize
27.
The large elongated cells that provide nutrition to developing sperms are
Primary germ cells
Sertoli cells
Leydig cells
Spermatogonia
28.
The outer most of the three cranial meninges is
arachnoid membrane
piamater
duramater
myelin sheath
29.
Polyphagia is a condition seen in
Obesity
Diabetes mellitus
Diabetes insipidus
AIDS
30.
Mammals are ______________ animals.
Cold blooded
Warm blooded
Poikilothermic
All the above
31.
The chemical equation Na2SO4(aq) + BaCl2(aq) → BaSO4(s)↓ + 2NaCl(aq) represents which of the following types of reaction?
Neutralisation
Combustion
Precipitation
Single displacement
32.
The process of coating the surface of metal with a thin layer of zinc is called______.
painting
thinning
galvanization
electroplating
33.
_____________ aprons are used to protect us from gamma radiations
Lead oxide
Iron
Lead
Aluminium
34.
Which of the following lens would you prefer to use while reading small letters found in a dictionary?
A convex lens of focal length 5 cm
A concave lens of focal length 5 cm
A convex lens of focal length 10 cm
A concave lens of focal length 10 cm
35.
1.
(b)
Incineration
2.
(a)
Green flag
3.
(a)
1st December
4.
(a)
99%
5.
(b)
fermentation of molasses
6.
(b)
Abscisic Acid
7.
(a)
W.F.Libby
8.
(c)
Thick hair
9.
(b)
Cerebrum
10.
(c)
PCl3 + Cl2 ⟶ PCl5
11.
(a)
Boyle's law
12.
(d)
83
13.
(b)
\(\frac { 1 }{ f } =\frac { 1 }{ v } -\frac { 1 }{ u } \)
14.
(d)
both a & b
15.
(c)
10,000 Hz
16.
(d)
all the above
17.
(b)
Placenta
18.
(c)
Antipodals
19.
(a)
Blood
20.
(a)
ejaculatory ducts
21.
(b)
22.
(c)
23.
(b)
Maintain a potential difference
24.
(a)
25.
(d)
wood and animal dung
26.
(c)
cow pea
27.
(b)
Sertoli cells
28.
(c)
duramater
29.
(b)
Diabetes mellitus
30.
(b)
Warm blooded
31.
(c)
Precipitation
32.
(c)
galvanization
33.
(c)
Lead
34.
(a)
A convex lens of focal length 5 cm
35.
(d)
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
