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Choose the correct tests with respective observations.
(A) \( \mathrm{CuSO_4} \) (acidified with acetic acid) \( + \mathrm{K_4[Fe(CN)_6]} \rightarrow \) Chocolate brown precipitate.
(B) \( \mathrm{FeCl_3} + \mathrm{K_4[Fe(CN)_6]} \rightarrow \) Prussian blue precipitate.
(C) \( \mathrm{ZnCl_2} + \mathrm{K_4[Fe(CN)_6]} \), neutralised with \( \mathrm{NH_4OH} \rightarrow \) White or bluish white precipitate.
(D) \( \mathrm{MgCl_2} + \mathrm{K_4[Fe(CN)_6]} \rightarrow \) Blue precipitate.
(E) \( \mathrm{BaCl_2} + \mathrm{K_4[Fe(CN)_6]} \), neutralised with \( \mathrm{NaOH} \rightarrow \) White precipitate.
Choose the correct answer from the options given below:

During the qualitative analysis of salt with cation \( y^{2+} \), addition of a reagent \( (X) \) to alkaline solution of the salt gives a bright red precipitate The reagent \( (X) \) and the cation \( (y^{2+}) \) present respectively are;

Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following is ______.

Which of the following compounds would give the following set of qualitative analysis?
(i) Fehling’s Test : Positive
(ii) \( \mathrm{Na} \) Fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not Prussian blue.

Consider the sulphides \( \mathrm{HgS} \), \( \mathrm{PbS} \), \( \mathrm{CuS} \), \( \mathrm{Sb_2S_3} \), \( \mathrm{As_2S_3} \) and \( \mathrm{CdS} \). Number of these sulphides soluble in \( 50\% \) \( \mathrm{HNO_3} \) is _________ .

Compound that will give positive Lassaigne’s test for both nitrogen and halogen is:

Statement I : A mixture of \( \mathrm{C_{12}H_{22}O_{11}} \) (sugar) and \( \mathrm{NaCl} \) can be separated by dissolving sugar in alcohol, due to differential solubility.
Statement II : Rose essence from rose petals is separated by steam distillation due to its high volatility and insolubility in \( \mathrm{H_{2}O} \).
In the light of the above statements, choose the correct answer from the options given below :

In the wet tests for identification of various cations by precipitate, which transition element cation doesn’t belong to group IV in qualitative inorganic analysis?

$0.53\text{ g}$ of an organic compound $(\text{x})$ when heated with excess of nitric acid (concentrated) and then with silver nitrate gave $0.75\text{ g}$ of silver bromide precipitate. $1.0\text{ g}$ of $(\text{x})$ have $1.32\text{ g}$ of $\text{CO}_2$ gas on combustion. The percentage of hydrogen in the compound $(\text{x})$ is ______________%. [Nearest Integer]

$
\begin{aligned}
&[\text{Given : Molar mass in g mol}^{-1} \text{ H} : 1, \text{ C} : 12, \text{ Br} : 80, \text{ Ag} : 108, \text{ O} : 16; \text{ Compound (x)} : \\
&\text{C}_x\text{H}_y\text{Br}_z]
\end{aligned}
$

In Dumas’ method for estimation of nitrogen \( 0.4 \, \text{g} \) of an organic compound gave \( 60 \, \text{mL} \) of nitrogen collected at \( 300 \, \text{K} \) temperature and \( 715 \, \text{mm Hg} \) pressure. The percentage composition of nitrogen in the compound is:
(Given: Aqueous tension at \( 300 \, \text{K} \) = \( 15 \, \text{mm Hg} \))