State the reason for the following statements in one sentence:- (i) "Dry Hydrogen chloride gas does not turn blue litmus red whereas dilute Hydrochloric acid." (ii) "During summer season, a milk man usually adds a very small amount of baking soda to fresh milk." (iii) "Rubbing of baking soda on the sting area gives relief." (iv) "curd is not kept in copper and brass utensils."
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I don't know thank you and make sure that you write this answer by your own.
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1. dry hcl gas does not give h+ions by dissociation
for this to happen aqueous medium is required.
h+ ions are what turns blue litmus red and dilute hcl is in aq medium
2. milk curdles faster in acidic medium at warm temperatures so to slow it down base is added.
3. Not sure but I believe it is used to dis infect wounds
4. curd is acidic, contains lactic acid and other acids used to increase rate of curdling, this can corrode and react with metals
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