Question

1.
19
.
Why should curd and sour substances not be kept in brass and copper
vessels
Which gas is usually liberated when an acid reacts with a metal?
Mustrate with an example. How will you test for the presence of
this gas?
Metal compound A reacts with dilute hydrochloric acid to produce
effervescence. The gas evolved extinguishes a burning candle. Write a
balanced chemical equation for the reaction iſ one of the compounds
formed is calcium chloride,
3​

Answer 1

Answer:

because curd contains lactobacillus that means it contains bacteria so it will not kept

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