Question

a)The pH of a salt used to make tasty and crispy pakoras is 9.Identify the salt and
write a chemical equation for its formation. List its two uses also.
b)Define olfactory indicators. Name two substances which can be used as olfactory
indicators.
c) Choose weak acids from the following:
CH3COOH, H2SO4, HNO3 , H2CO3​

Answer 1

(a) The salt used to make tasty and crispy pakoras are sodium hydrogen bicarbonate. The chemical formula is NaHCO3.

Two of its uses are:

(1) It is used as an antacid in medicine to remove acidity of the stomach

(2) It is also used in fire extinguisher

(b) Those substances whose smell odour changes in acidic or basic solution are called olfactory indicators e.g. onion and vanilla.

(c) CH3COOH, H2CO3 are both weak acids

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Answer 2

Answer:

(a) The salt used to make tasty and crispy pakoras are sodium hydrogen bicarbonate. The chemical formula is NaHCO$3$.

Two of its uses are:

    (1) It is used as an antacid in medicine to remove acidity of the stomach

    (2) It is also used in fire extinguisher

(b) Those substances whose smell odor changes in basic or acidic solution are called olfactory indicators e.g. onion and vanilla.

(c) CH$3$COOH, H$2$CO$3$ are both weak acids

Hope it helps you :)

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