Question

D. CHOOSE THE CORRECT ANSWER
1. During a physical change
(a) energy is evolved
colour, shape or state are changed
new substance is formed
light is produced
2. An example of chemical change is
(a) dissolution of sugar in water
(c) digestion of food
formation of cloud
3. A chemical change is accompanied by
(a) heat
(c) sound
(b) gas
(d) all of these
4 an alloy among the following is
copper
steel
nickel
iron
5 process of crystallisation is not applicable in
obtaining salt from sea
rusting of iron
formation of snow flakes
obtaining sugar crystal from it's solution​

Answer 1

1. physical changes occur when objects or substances undergo a change that does not change their chemical composition.
2. digestion of food and formation of cloud
3. all of these
4. all of theseSteel
5. rusting of iron

Answer 2

Answer:

The global Covid - 19 pandemic unexpectedly entered our lives and put everything to a halt. It affected the lives of people around the world bringing a flood of tension and worries followed by negative thoughts and piles of boredom. But I took it as a challenge to handle this situation with determination and positivity thereby taking advantage of the lockdown. My parents motivated me to complete this challenge. The lockdown has affected my life quite disturbingly. My first priority, Taekwondo Federation of India National - Level Championship, scheduled in March got postponed. I desperately wanted to win a national gold medal in taekwondo for the second time. Another high valued South Asian Cup Martial Arts Championship in Nepal that was due in Feb - March 2020 also got delayed. I was really looking forward to more tournaments in 2020. But my coaches have not let my fitness get off the track as I am enjoying virtual classes