Question

How Neha can determine that chemical reaction has happened ? ਨੇਹਾ ਹੇਠ ਲਿਖੇ ਕਿਸ ਪ੍ਰੇਖਣ ਦੇ ਆਧਾਰ ਤੇ ਨਿਰਧਾਰਿਤ ਕਰ ਸਕਦੀ ਹੈ ਕਿ ਰਸਾਇਣਿਕ ਕਿਰਿਆ ਹੋਈ ਹੈ? / नेहा कैसे निर्धारित कर सकती है कि रासायनिक प्रतिक्रिया हुई है? *

(1) Change in state / ਅਵਸਥਾ ਵਿੱਚ ਪਰਿਵਰਤਨ / अवस्थ: में परिवर्तन

(2) Change in Colour / ਰੰਗ ਵਿੱਚ ਪਰਿਵਰਤਨ / रंग में परिवर्तन

(3) Liberation of gas / ਗੈਸ ਦੀ ਉੱਤਪਤੀ / गैस मुक्ति

(4) All of above / ਉੱਪਰੋਕਤ ਸਾਰੇ / ऊपर के सभी​

Answer 1

Answer:

4 option

Explanation:

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Answer 2

Answer:

Option 4 - All the above is the correct answer.

Explanation:

Any of the following changes can help us assess whether or not a chemical reaction has occurred.

• The synthesis of a novel material (s)
• A transition in state
• A variation in colour
• Temperature fluctuations
• Precipitation is the formation of a substance
• A gas's evolution

Example: When two compounds are mixed and gas is produced, we can say that a chemical reaction has occurred.

• A chemical reaction occurs when one or more compounds, known as reactants, are changed into one or more distinct substances, known as products.
• Chemical elements or compounds are examples of substances.
• The constituent atoms of the reactants are rearranged in a chemical reaction, resulting in the formation of various substances as products.

Hence, change in state, colour, and evolution of gases determines that chemical reaction took place.

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