Bottle A contains a dilute solution of vinegar and bottle B contains sodium carbonate solution. Write the colour seen in pH paper dipped in A and B.

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Bottle (A) contains

320

mL of

H_{2} O_{2}

solution and is labeled with

10 V H_{2} O_{2}

and bottle (B) contains

80

mL of

H_{2} O_{2}

having normality

5 N

. If bottle (A) and (B) are mixed and solution filled in bottle (C), select the correct label for bottle (C) in terms of volume strength and in terms of g/L.

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When the stopper of a bottle containing colorless solution was removed, the bottle gave out a smell like that of vinegar. Identify the solution. What is the nature of the solution?

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A chemist opened a cupboard to find four bottles containing water solutions, each of which has lost its label. Bottles 1, 2 and 3 contained colourless solutions, while Bottle 4 contained a blue solution. The labels from the bottles were lying scattered on the floor of the cupboard.They were : copper (II) sulphate, sodium carbonate, lead nitrate and hydrochloric acid.
By mixing samples of the contents of the bottles, in pairs, the chemist made the following observations:
(i) Bottle 1 + Bottle 2 : white precipitate
(ii) Bottle 1 + Bottle 3 : white precipitate
(iii) Bottle 1 + Bottle 4 : white precipitate
(iv) Bottle 2 + Bottle 3 : colorless gas evolved
(v) Bottle 2 + Bottle 4 : no visible reaction
(vi) Bottle 3 + Bottle 4 : blue precipitate

Colourless solution present in Bottle-1 is___________.

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The colour of the pH paper strip turned red when it was dipped into a sample. The sample could be :
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(2) tap water
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Bottle (A) contain 320mL of

H_{2} O_{2}

solution and labelled with

10 V H_{2} O_{2}

and bottle (B) contain

80

H_{2} O_{2}

having normality

5 N

. Content of bottle (A) and bottle (B) are mixed and solution is filled in bottle (C). Select the correct label for bottle (C) in term of volume strength and g/litre.

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