Beta Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>EXERCISE-2>Q 2

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An inorganic lewis acid $[X]$ gives gelatinous white ppt. With ${NH}_{4} OH$ in presence of ${NH}_{4} Cl$ . $[X]$ will respond to which of the following characteristics

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Important Questions on Qualitative Analysis

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Beta Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>EXERCISE-2>Q 3

{SO}_{2}

and

{CO}_{2}

both turn lime water

(A)

milky,

{SO}_{2}

also turns

K_{2} {Cr}_{2} O_{7} / H^{+}

(B)

green while

O_{2}

is soluble in pyrogallol

(C)

turning it black. These gases are to detected in order by using these reagents. The order is

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Beta Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>EXERCISE-2>Q 4

KI

solution identifies

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Beta Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>EXERCISE-2>Q 5

Production of a green edged flame on igniting the vapours evolved by heating a given inorganic salt with a few

ml

of ethanol and concentrated

H_{2} {SO}_{4}

indicates the presence of:

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Beta Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>EXERCISE-2>Q 6

When

{CS}_{2}

layer containing both

{Br}_{2}

and

I_{2}

is shaken with excess of

{Cl}_{2}

water, the violet colour due to

I_{2}

disappears and orange colour due to

{Br}_{2}

appears. The disappearance of violet colour is due to the formation of

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Beta Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>EXERCISE-2>Q 7

On the addition of a solution containing

{CrO}_{4}^{2 -}

ions to the solution of

{Ba}^{2 +}, {Sr}^{2 +}

and

{Ca}^{2 +}

ions, the precipitate obtained first will be of:

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Beta Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>EXERCISE-2>Q 8

A yellow precipitate is obtained when

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Beta Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>EXERCISE-2>Q 9

Which of the following ions can be separated by using

{NH}_{4} Cl

and

{NH}_{4} OH

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Beta Question Bank for Engineering: Chemistry>Chapter 22 - Qualitative Analysis>EXERCISE-2>Q 10

Which of the following cations cannot be separated by adding

{NH}_{4} Cl, {NH}_{4} OH

and

{({NH}_{4})}_{2} {CO}_{3}

to their solution?