Question

18. ਅੱਜ ਮਨਵੀਰ ਕੁਦਰਤੀ ਸੂਚਕਾਂ ਬਾਰੇ ਪੜ੍ਹ ਰਿਹਾ
ਸੀ। ਉਸ ਦੇ ਅਧਿਆਪਕ ਨੇ ਕੁਝ ਪਦਾਰਥ ਉਸਦੇ
ਸਾਹਮਣੇ ਰੱਖੇ ਅਤੇ ਪੁੱਛਿਆ ਕਿ ਇਹਨਾਂ ਵਿੱਚੋਂ ਕਿਸ
ਪਦਾਰਥ ਨੂੰ ਕੁਦਰਤੀ ਸੂਚਕ ਦੇ ਰੂਪ ਵਿਚ ਵਰਤਿਆ
ਜਾਂਦਾ ਹੈ? Today Manveer was reading
about natural indicators. His teache
placed some substances in front of
him and asked which of these
substances is used as a natural
indicator? ਆਜ ਸਰਰੀਦ ਬਾਰੇ ਚਰਨੀਂ
बारे में पढ रहा था। उनके शिक्षक ने उनके सामने
कुछ पदार्थ रखे और पूछा कि इनमें से कौन सा
पदार्थ प्राकृतिक संकेतक के रूप में उपयोग किया
ਜਾਗ ?​

Answer 1

Today Manveer was reading  about natural indicators. His teache r placed some substances in front of  him and asked which of these  substances are used as a natural  indicator?

The options are:

a. Piece of wood

b. China rose

c. Salt

d. Iron nail

Explanation:

• 'CHINA ROSE'(B) is a natural indicator.

• Indicators are substances that change color when reacting with the acid/basic solutions.

• 'China rose' is a natural indicator that turns acidic solutions to a magenta color and basic solutions to green color.

• Iron Nail, wood piece, or salt doesn't change its color when reacting with the acid/ basic solutions.

• Some of the other Natural indicators are litmus, turmeric, and red cabbage.

Answer 2

Explanation:

The complete translation of given question in English is;

Today Manveer is reading about natural indicators. Her teacher gave her some substance. Put it in front and ask which of these Substances used as natural indicators?

Natural indicators are substances that changes their color naturally due to the effect of other substance brought in contact with them. One of the natural colors is Rose Pink which can change color both with acids and basis. Other susbstance is litmus paper. These dont need some additional reactants to change their physical appreances and are used to determine the chemical properties of a substance that needs to be detected