Practical chemistry practice · Medium

An aqueous solution of colourless metal sulphate $M,$ gives a white ppt. with $\mathrm{NH}_4 \mathrm{OH}.$ This was soluble in excess of $\mathrm{NH}_4 \mathrm{OH}.$ On passing $\mathrm{H}_2 \mathrm{S}$ through this solution a white ppt is formed. The metal $M$ in the salt is

Which method(s) can be used to determine the concentration of $\mathrm{HNO}_3$ in an aqueous solution of nitric acid?

I) titration with a standard base

II) titration with a standard oxidizing agent

III) precipitation with $\mathrm{A g}^+$

......... is formed when potassium iodide is heated with conc. $\mathrm{H}_2 \mathrm{SO}_4$

An aqueous solution of $\mathrm{FeSO}_4 \cdot \mathrm{Al}_2\left(\mathrm{SO}_4\right)_3$ and chrome alum is heated with excess of $\mathrm{Na}_2 \mathrm{O}_2$ and filtered the materials obtained are

Which of the following does not give ${NH}_3$ on heating with $NaOH$ solution?

When a substance $A$ reacts with water it produces a combustible gas $B$ and a solution of substance $C$ in water. When another substance $D$ reacts with this solution of $C,$ it also produces the same gas $B$ on warming but $D$ can produce gas $B$ on reaction with dilute sulphuric acid at room temperature. $A$ imparts a deep golden yellow colour a smokeless flame to Bunsen burner. $A, B, C$ and $D$ respectively are:

The compound formed in the borax bead test of $\mathrm{Cu}^{2+}$ ion in oxidising flame is:

Phenolphltalein indicator is prepared by
dissolving phenolpthalein in

Which one of the following salt give green coloured flame when the salt is tested by Pt wire

On passing a gas, '$X$', through Nessler's regent, a brown precipitate is obtained. The gas '$X$' is

The presence of $\mathrm{NH}_4^{+}$ radical in solution can be detected by

In Carius method of estimation of halogens, 0.5 g of an organic compound gave 0.376 g of AgBr. The percentage of bromine in the compound is (Atomic mass of Ag = 108 u and Br = 80 u)

The metal ion which is precipitated when $\mathrm{H}_2 \mathrm{S}$ is passed with $\mathrm{HCl}.$

Which of the following pairs of cations can not be separated by using $\mathrm{NH}_3$ solution.

In borax bead test, which of the following compound is formed

Which of the following pairs of ions would be expected to form precipitate when dilute solution are mixed?

When acetic acid and potassium ferrocyanide are added to copper salt, the colour of the precipitate is

$MnO_2$ and $H_2SO_4$ added to NaCl, the greenish yellow gas liberated is

Sometimes yellow turbidity appears while passing $\mathrm{H}_2 \mathrm{S}$ gas even in the absence of II group radicals. This is because of

An orange precipitate in the second group is given by

Mark the compound which is soluble in hot water.

$\text{NiS}$ is separated from $\mathrm{ZnS}$ by treating with

When $\mathrm{H}_2 \mathrm{S}$ gas is passed in a metal sulphate solution in presence of $\mathrm{NH}_4 \mathrm{OH},$ a white precipitate is produced. The metal is identified as

Which of the following statements is correct about phenolphthalein:

(A) It is a phthalein dye.

(B) It is used as an acid base indicator

(C) It is obtained by condensation of phenol with phthalic anhydride in presence of conc. $\mathrm{H}_2 \mathrm{SO}_4$