JEE MainsJEE AdvanceBITSAT

JEE Mains | PYQ

The number of white coloured salts, among the following is _______.
(a) \( \mathrm{SrSO_4} \)            (b) \( \mathrm{Mg(NH_4)PO_4} \)          (c) \( \mathrm{BaCrO_4} \)       (d) \( \mathrm{Mn(OH)_2} \)
(e) \( \mathrm{PbSO_4} \)           (f) \( \mathrm{PbCrO_4} \)                     (g) \( \mathrm{AgBr} \)             (h) \( \mathrm{PbI_2} \)
(i) \( \mathrm{CaC_2O_4} \)         (j) \( [\mathrm{Fe(OH)_2(CH_3COO)}] \)

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

The compound that is white in color is:

In the precipitation of the iron group \( (\text{III}) \) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to:

Yellow compound of lead chromate gets dissolved on treatment with hot \( \text{NaOH} \) solution. The product of lead formed is a :

Given below are two statements:

Statement I: On passing \( \mathrm{HCl_{(g)}} \) through a saturated solution of \( \mathrm{BaCl_2} \) at room temperature white turbidity appears.
Statement II: When \( \mathrm{HCl} \) gas is passed through a saturated solution of \( \mathrm{NaCl} \), sodium chloride is precipitated due to common ion effect.
In the light of the above statements, choose the most appropriate answer from the options given below:

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 __________ \( \text{BM} \) (Nearest integer) [Given atomic number of Cu = \( 29 \), Ni = \( 28 \), Mn = \( 25 \), Fe = \( 26 \)].

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in \( \mathrm{NH_4OH} \) solution when sodium carbonate extract was first acidified with dil. \( \mathrm{HNO_3} \) and then \( \mathrm{AgNO_3} \) solution was added. This indicates presence of:

The azo-dye (Y) formed in the following reaction is.
Sulphanilic acid + \( \text{NaNO}_2 \) + \( \text{CH}_3\text{COOH} \) \( \rightarrow \) X.

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