Alpha Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>Exercise-1>Q 29

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Two inorganic compounds $A$ and $B$ were heated in a dry test tube. $A$ evolved a colourless gas which turned lead acetate paper black and $B$ evolved a gas which turned lime water milky. The anions in $A$ and B respectively are:

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Important Questions on Qualitative Analysis

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Alpha Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>Exercise-1>Q 30

If addition of conc.

H_{2} {SO}_{4}

is made to an unknown salt, a colourless and odourless gas is produced then which of the following can be present?

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Alpha Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>Exercise-1>Q 31

A gas turns lime water milky and acidified

K_{2} {Cr}_{2} O_{7}

solution green then gas is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>Exercise-1>Q 32

A gas has smell like rotten egg and turns lead acetate paper black. The gas is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>Exercise-1>Q 33

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Anion $(X^{2 -})$ is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>Exercise-1>Q 34

The acidic solution of a salt produces blue colour with

KI

starch solution. The reaction indicates the presence of:

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Alpha Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>Exercise-1>Q 35

Sulphide ion reacts with

{Na}_{2} [Fe (CN)_{5} NO]

to form a purple coloured compound

(X) .

In this reaction oxidation state of iron.

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Alpha Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>Exercise-1>Q 36

Which of the following pair of anions are identified by conc.

H_{2} {SO}_{4}

?

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Alpha Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>Exercise-1>Q 37

Which of the following anion behaves in a different manner than other on heating with conc.

H_{2} {SO}_{4}

?