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Published on: 05/12/2020
10th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Four
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 Chipko movement originated in_________
Uttar pradesh
Uttarakhand
Arunachal Pradesh
Madhya Pradesh
2.
In Scratch, the characters are known as_________
Sprite
Stage
Element
Script
3.
______________ is a symptom of CHD.
Glycosuria
Ischemia
Hyperglycemia
Polyphagia
4.
Pusa sawani is a insect resistant variety of __________
cowpea
flat bean
lady's finger
brassica
5.
______ is the hormone secreted by Thymus.
Thymosin
Estrogen
Testosterone
Progesterone
6.
7.
The process of formation of fossils in the rocks is called ________.
calcification
crystallization
petrification
fossilization
8.
Biogenesis was speculated by _________.
Oparin
Louis Pasteur
Haldane
All the above
9.
______is not a nitrogenous base.
Adenine
Thymine
Leucine
Cytosine
10.
________is a disc shaped structure.
Uterus
Placenta
Ovary
Sperm
11.
_______from anterior pituitary stimulates milk secretion
Oxytocin
Prolactin
Progestrone
Oestrogen
12.
Gravitational, magnetic and electro magnetic forces are example for _______ force.
Contact
Non - contact
Balanced
Unbalanced
13.
Common energy source in village is
electricity
coal
biogas
wood and animal dung
14.
The loss of one or more chromosome in a ploidy is called_____________.
Tetraploidy
Aneuploidy
Euploidy
Polyploidy
15.
Identify the exocrine gland
Pituitary gland
Adrenal gland
Salivary gland
Thyroid gland
16.
DNA fingerprinting is based on the principle of identifying _______ sequences of DNA
single stranded
mutated
polymorphic
repetitive
17.
Estrogen is secreted by
Anterior pituitary
Primary follicle
Graffian follicle
Graffian follicle
18.
The best way of direct dating fossils of recent origin is by
Radio-carbon method
Uranium lead method
Potassium-argon method
Both (a) and (c)
19.
Vomiting centre is located in
medulla oblongata
stomach
cerebrum
hypothalamus
20.
Metastasis is associated with
Malignant tumour
Benign tumour
Both (a) and (b)
Crown gall tumour
21.
‘Heart of Heart’ is called
SA node
AV node
Purkinje fibres
Bundle of His
22.
The body of leech has
23 segments
33 segments
38 segments
30 segments
23.
A reaction between carbon and oxygen is represented by C(s) + O2(g) → CO2(g) + Heat. In which of the type(s), the above reaction can be classified?
(i) Combination Reaction
(ii) Combustion Reaction
(iii) Decomposition Reaction
(iv) Irreversible Reaction
i and ii
i and iv
i, ii and iii
i, ii and iv
24.
A 25% alcohol solution means
25 ml alcohol in 100 ml of water
25 ml alcohol in 25 ml of water
25 ml alcohol in 75 ml of water
75 ml alcohol in 25 ml of water
25.
26.
_____ is a relative periodic property.
atomic radii
ionic radii
electron affinity
electronegativity
27.
Oxygen is produced at what point during photosynthesis ?
when ATP is converted to ADP
when CO2 is fixed
when H2O is splitted
All of these
28.
_____________ aprons are used to protect us from gamma radiations
Lead oxide
Iron
Lead
Aluminium
29.
Rectified spirit is an aqueous solution which contains about _______ of ethanol
95.5 %
75.5 %
55.5 %
45.5 %
30.
If a sound wave travels with a frequency of 1.25 x 104 Hz at 344 ms-1, the wavelength will be
27.52 m
275.2 m
0.02752 m
2.752 m
31.
Which of the following represents 1 amu?
Mass of a C – 12 atom
Mass of a hydrogen atom
1/12th of the mass of a C – 12 atom
Mass of O – 16 atom
32.
Kilowatt hour is the unit of
resistivity
conductivity
electrical energy
electrical power
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.
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.
The unit of ‘g’ is m s-2. It can be also expressed as ______.
cms-1
Nkg-1
Nm2kg-1
cm2s-2
1.
(b)
Uttarakhand
2.
(a)
Sprite
3.
(b)
Ischemia
4.
(c)
lady's finger
5.
(a)
Thymosin
6.
(a)
7.
(d)
fossilization
8.
(b)
Louis Pasteur
9.
(c)
Leucine
10.
(b)
Placenta
11.
(b)
Prolactin
12.
(b)
Non - contact
13.
(d)
wood and animal dung
14.
(b)
Aneuploidy
15.
(c)
Salivary gland
16.
(d)
repetitive
17.
(c)
Graffian follicle
18.
(a)
Radio-carbon method
19.
(a)
medulla oblongata
20.
(a)
Malignant tumour
21.
(a)
SA node
22.
(b)
33 segments
23.
(d)
i, ii and iv
24.
(c)
25 ml alcohol in 75 ml of water
25.
(b)
26.
(d)
electronegativity
27.
(c)
when H2O is splitted
28.
(c)
Lead
29.
(a)
95.5 %
30.
(c)
0.02752 m
31.
(c)
1/12th of the mass of a C – 12 atom
32.
(c)
electrical energy
33.
(c)
difference in T.E and P.E
34.
(a)
A convex lens of focal length 5 cm
35.
(b)
Nkg-1
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards