Board Paper of Class 10 2018 Science - Solutions
Note:
i. Draw well-labelled diagrams wherever necessary.
ii. All questions are compulsory.
- Question 1
| (A) |
(a) |
Rewrite the following statements with suitable words in the blanks:
(i) There are ___________ pairs of chromosomes in humans being.
(ii) ____________ is a functional group of alcohol. |
[2] |
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(b) |
State whether the following statements are true or false:
(i) There are two sets of chromosomes in zygote.
(ii) All animals and fungi autotrophs. |
[2] |
| |
(c) |
Find the odd one out
Amoeba, Euglena, Planaria, Paramoecium |
[1] |
| (B) |
|
Rewrite the following statements by choosing the correct alternatives: |
[5] |
| |
(1) |
Acetic acid ____________.
(a) is insoluble in water
(b) turns blue litmus red
(c) is pale yellow in colour
(d) none of the above |
|
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(2) |
____________ type of reproduction occurs in Hydra.
(a) Binary fission
(b) Multiple fission
(c) Budding
(d) Fragmentation |
|
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(3) |
Solution of aluminium sulphate in water is___________
(a) Green
(b) Colourless
(c) Pink
(d) Blue |
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(4) |
Reaction of iron nail with copper sulphate solution is ____________ reaction.
(a) Combination
(b) Displacement
(c) Double displacement
(d) Decomposition |
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(5) |
The loss of water in the form of water vapour through stomata on leaves is known as ____________.
(a) Distillation
(b) Diffusion
(c) Osmosis
(d) Transpiration |
VIEW SOLUTION
- Question 2
| Answer the following questions (any five) : |
[10] |
| (1) |
Name four plant hormones. |
| (2) |
Why are metals used for making cooking vessels? |
| (3) |
Suggest control measures of noise pollution. |
| (4) |
What are alloys? Give two examples. |
| (5) |
Classify the following as voluntary actions and involuntary actions: Sneezing, throwing ball, heart beats, writing. |
| (6) |
Name any four life processes in living things. |
VIEW SOLUTION
- Question 3
| Answer the following questions (any five) : |
[15] |
| (1) |
Population explosion is the root cause for depletion of natural resources. Explain. |
| (2) |
Human tail bone is a vestigial organ. Explain. |
| (3) |
What is anodising? Give its applications. |
| (4) |
Write the changes that occur in the age group 11 to 21 years in boys. |
| (5) |
Name different types of neurons and give one function of each. |
| (6) |
How is sex determined in the human beings? |
VIEW SOLUTION
- Question 4
| Answer any one of the following questions |
[5] |
| (1) |
What are covalent compounds? Write any three features and give two examples. |
| (2) |
Draw well labelled diagram of human excretory system. Write the functions of:
(a) Kidney
(b) Ureter
(c) Urinary bladder |
VIEW SOLUTION
