10th Standard CBSE Syllabus & Materials
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Published on: 25/05/2021
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Questions + Answers key
Take MCQ Science Test1.
The correct structural formula of butanoic acid is
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2.
Which one of the following figures correctly describes the process of electrolytic refining?
3.
In which of the following, the image of an object placed at infinity will be highly diminished and point sized?
Concave mirror only
Convex mirror only
Convex lens only
Concave mirror, convex mirror, concave lens and convex lens
4.
In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F2 is
1 : 3
3 : 1
1 : 1
2 : 1
5.
In human males, the testes lie in the scrotum because it helps in the
process of mating
formation of sperm
easy transfer of gametes
all the above
6.
Which of the following statement is incorrect?
For every hormone there is a gene
For every protein there is a gene
For production of every enzyme there is a gene.
For every molecule of fat there is a gene.
7.
The number of chromosomes in parents and offspring of a particular species remains constant due to
doubling of chromosomes after zygote formation
halving of chromosomes during gamete formation
doubling of chromosomes after gamete formation
halving of chromosomes after gamete formation
8.
Which of the following is the outermost shell for elements of period 2?
K shell
L shell
M shell
N shell
9.
Pentane has the molecular formula C5H12 . It has
5 covalent bonds
12 covalent bonds
16 covalent bonds
17 covalent bonds
10.
Choose the correct statement that describes arteries.
They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart
They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various orange of the body
They have thick elastic walls, blood flows under low pressure; carry blood from heart to various organs of the body
They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body
11.
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(i) Au (ii) Cu (iii) Na (iv) K
(i) and (ii)
(i) and (iii)
(ii) and (iii)
(iii) and (iv)
12.
Which of the following endocrine glands is unpaired?
Adrenal
Testes
Pituitary
Ovary
13.
Which of the following statements are true about the brain?
(i) The main thinking part of brain is hind brain
(ii) Centres of hearing, smell, memory, sight, etc. are located in forebrain.
(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain
(iv) Cerebellum does not control posture and balance of the body
(i) and (ii)
(i), (ii) and (iii)
(ii) and (iii)
(iii) and (iv)
14.
Which of the following phenomena occur, when a small amount of acid is added to water?
(i) Ionisation (ii) Neutralisation (iii) Dilution (iv) Salt formation
(i) and (ii)
(i) and (iii)
(ii) and (iii)
(ii) and (iv)
15.
Which one of the following types of medicines is used for treating indigestion?
Antibiotic
Analgesic
Antacid
Antiseptic
1.
(d)
2.
(c)
3.
(d)
Concave mirror, convex mirror, concave lens and convex lens
4.
(c)
1 : 1
5.
(b)
formation of sperm
6.
(d)
For every molecule of fat there is a gene.
7.
(b)
halving of chromosomes during gamete formation
8.
(b)
L shell
9.
(c)
16 covalent bonds
10.
(d)
They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body
11.
(a)
(i) and (ii)
12.
(c)
Pituitary
13.
(c)
(ii) and (iii)
14.
(b)
(i) and (iii)
15.
(c)
Antacid
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