Question

3. Classify the following as physical or chemical changes:

melting of ice, burning of agarbatti, tearing of clothes, cooking of food, formation of a cloud,formation of seeds from flowers, drying of wet clothes, formation of curd from milk, burningof cooking gas, dissolution of sugar in water, hammering of metals to form sheets, melting ofwax, melting of butter, digestion of food, lightning in the sky, explosion of fire crackers.​

Answer 1

Explanation:

Physical changes

• melting of ice
• tearing of clothes
• formation of a cloud
• drying of wet clothes
• dissolution of sugar in water
• hammering of metals to form sheets
• melting of wax
• melting of butter

Chemical changes

• burning of agarbatti
• cooking of food
• formation of seeds from flower
• formation of curd from milk
• burning of cooking gas
• digestion of food
• lightning in the sky
• explosion of fire crackers.

Answer 2

Answer:

आर्थिक विकास की विशेषताएं

राष्ट्रीय आय व प्रति व्यक्ति आय में वृद्धि :- एक देश की वास्तविक राष्ट्रीय आय में वृद्धि उसके विकास का सूचक होती है । ... जीवन स्तर में वृद्धि :- यदि राष्ट्रीय आय का बड़ा हिस्सा धनी वर्ग को मिलता है तो आर्थिक विकास अधिक सार्थक नही माना जाता है ।

thnx