Practical Chemistry

In a borax bead test under hot condition, a metal salt (one from the given) is heated at point B of the flame, resulted in green colour salt bead. The spin-only magnetic moment value of the salt is _______ BM (Nearest…

In the sulphur estimation, $0.471g$of an organic compound gave $1.44g$ of barium sulfate. The percentage of sulphur in the compound is. (Nearest integer) (Atomic Mass of $\mathrm{Ba}=137u$)

Molar mass of the salt from $\mathrm{NaBr},\mathrm{NaNO}_{3},\mathrm{KI}$ and $\mathrm{CaF}_{2}$which does not evolve coloured vapours on heating with concentrated $H_{2}\mathrm{SO}_{4}$ is ____$g\mathrm{mol}^{-1}$,…

To an aqueous solution containing ions such as $\mathrm{Al}^{3+},\mathrm{Zn}^{2+},\mathrm{Ca}^{2+},\mathrm{Fe}^{3+},\mathrm{Ni}^{2+},\mathrm{Ba}^{2+}$ and $\mathrm{Cu}^{2+}$wasadded $\mathrm{conc}.\mathrm{HCl}$,…

The number of white coloured salts among the following is ....... $\left(A\right)\mathrm{SrSO}_{4}\left(B\right)\mathrm{Mg}\left(\mathrm{NH}_{4}\right)\mathrm{PO}_{4}\left(C\right)\mathrm{BaCrO}_{4}$…

Match List-I with List-II List-I List-II Test/Reagents/Observation(s) Species detected (a) Lassaigne's Test (i) Carbon (b) Cu(II) oxide (ii) Sulphur (c) Silver nitrate (iii) $N,S,P$, and halogen (d) The sodium fusion…

Number of metal ions characterized by flame test among the following is _________. $\mathrm{Sr}^{2+},\mathrm{Ba}^{2+},\mathrm{Ca}^{2+},\mathrm{Cu}^{2+},\mathrm{Zn}^{2+},\mathrm{Co}^{2+},\mathrm{Fe}^{2+}$

Consider the following test for a group-IV cation. \(\begin{aligned} & \mathrm{M}^{2+}+\mathrm{H}_2 \mathrm{~S} \rightarrow \mathrm{A} \text { (Black precipitate) }+ \text { by product } \\ & \mathrm{A}+\text { aqua…

Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with $\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ is _____. $\mathrm{Cu}^{2+},…

Match List I with List II. List-I (Anion) List-II (gas evolved on reaction with dil. $H_{2}\mathrm{SO}_{4}$) (A) $\mathrm{CO}_{3}^{2-}$ (I) Colourless gas which turns lead acetate paper black. (B) $S^{2-}$ (II)…

Oxidation state of Fe(Iron) in complex formed in Brown ring test.

When a salt is treated with sodium hydroxide solution it gives gas $\mathrm{X}$. On passing gas $\mathrm{X}$ through reagent $\mathrm{Y}$ a brown coloured precipitate is formed. $\mathrm{X}$ and $\mathrm{Y}$…