Question

1. On converting 25 °C, 38 °C and 66 °C to kelvin scale, the correct answer will be


(a) 298 K, 311 K and 339 K


(b) 298 K, 300 K and 338 K


(c) 273 K, 278 K and 543 K


(d) 298 K, 310 K and 338 K


2. Choose the correct statement of the following


(a) conversion of solid into vapours without passing through the liquid


state is called vapourisation.

(b) conversion of vapours into solid without passing through the liquid state is called sublimation.


(c) conversion of vapours into solid without passing through the liquid state is called freezing.

(d) conversion of solid into liquid is called sublimation.


3. Rusting of an article made up of iron is called


(a) corrosion and it is a physical as well as chemical change


(b) dissolution and it is a physical change


(c) corrosion and it is a chemical change


(d) dissolution and it is a chemical change


4. Which of the following are homogeneous in nature?

(i) ice (ii) wood (iii) soil (iv) air


(a) (i) and (iii)

(b) (ii) and (iv)

(c) (i) and (iv)

(d) (iii) and (iv)

5. Which among the following has specialised tissue for conduction of water?


(a) Thallophyta

(b) Bryophyta

(c) Pteridophyta

(d) Fungi


6. Which of the following is not a criterion for classification of living organisms?


(a) Body design of the organism

(b) Ability to produce one’s own food

(c) Membrane bound nucleus and cell organelles

(d) Height of the plant


7. Which of the following is not important for individual’s health?


(a) Living in clean space

(b) Good economic condition

(c) Social equality and harmony

(d) Living in a large and well furnished house


8. Chromosomes are made up of

(a) DNA only

(b) protein only

(c) DNA and protein

(d) RNA only


9. A particle is moving in a circular path of radius (r). The displacement after

half a circle would be

(a) Zero

(b) π r

(c) 2 r
d) 2πr

10. An case of negative work the angle between the force and displacement is


(a) 0°

(b) 45°

(c) 90°

(d) 180°​

Answer 1

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1. (a) 298 K, 311 K and 339 K
2. (b) conversion of vapours into solid without passing through the liquid state is called sublimation.
3. (c) corrosion and it is a chemical change.
4. (c) (i) and (iv)
5. (c) Pteridophyta
6. (d) Height of the plant
7. (d) Living in a large and well furnished house
8. (c) DNA and protein
9. (c) 2 r
10. (d) 180°.

I Hope it's Helpful My Friend.

Answer 2

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1. On converting 25 °C, 38 °C and 66 °C to kelvin scale, the correct answer will be______.

• 298 K, 311 K and 339 K (Option A)

2. Choose the correct statement of the following.

• Conversion of solid into liquid is called sublimation. (Option D)

3. Rusting of an article made up of iron is called______.

• Corrosion and it is a chemical change. (Option C)

4. Which of the following are homogeneous in nature? [(i) ice (ii) wood (iii) soil (iv) air]

• (iii) and (iv) (Option D)

5. Which among the following has specialised tissue for conduction of water?

• Pteridophyta (Option C)

6. Which of the following is not a criterion for classification of living organisms?

• Height of the plant. (Option D)

7. Which of the following is not important for individual’s health?

• Living in a large and well furnished house. (Option D)

8. Chromosomes are made up of______.

• DNA and protein (Option C)

9. A particle is moving in a circular path of radius (r). The displacement after half a circle would be______.

• 2r (Option C)

10. An case of negative work the angle between the force and displacement is_____.

• 180° (Option D)

$\bf\huge{ Additional\: information :}$

Formula of Kelvin - C + 273°

Corrosion: It is the process in which iron metals are slowly eaten away by the action of air and moisture present in the air is called corrosion.

Sublimation - The conversation of the solid state to the gaseous state is known as called sublimation.

Examples of Pteridopyhta - Ferns, Horse-tail and Marsilea.

The division of kingdom plantae is based on -

1. Multicellular and Unicellular
2. The seeds are present or absent in the plant.
3. The seed is enclosed in fruit or not.
4. All organelles of cells are present or not.
5. The Plasmalemma is well developed or not.
6. Differentiation of tissues like vascular bundles.