Match the List-I with List-II :
List-I Cations |
List-II Group reagents |
||
---|---|---|---|
A. | $$\mathrm{Pb^{2+},Cu^{2+}}$$ | i) | $$\mathrm{H_2S}$$ gas in presence of dilute HCl |
B. | $$\mathrm{Al^{3+},Fe^{3+}}$$ | ii) | $$\mathrm{(NH_4)_2CO_3}$$ in presence of $$\mathrm{NH_4OH}$$ |
C. | $$\mathrm{Co^{2+},Ni^{2+}}$$ | iii) | $$\mathrm{NH_4OH}$$ in presence of $$\mathrm{NH_4Cl}$$ |
D. | $$\mathrm{Ba^{2+},Ca^{2+}}$$ | iv) | H2S in presence of NH4OH |
Correct match is -
Compound A reacts with NH$$_4$$Cl and forms a compound B. Compound B reacts with H$$_2$$O and excess of CO$$_2$$ to form compound C which on passing through or reaction with saturated NaCl solution forms sodium hydrogen carbonate. Compound A, B and C, are respectively :
A cubic solid is made up of two elements X and Y. Atoms of X are present on every alternate corner and one at the center of cube. Y is at $$\frac{1}{3}^{\mathrm{rd}}$$ of the total faces. The empirical formula of the compound is :
The density of a monobasic strong acid (Molar mass 24.2 g/mol) is 1.21 kg/L. The volume of its solution required for the complete neutralization of 25 mL of 0.24 M NaOH is __________ $$\times$$ 10$$^{-2}$$ mL (Nearest integer)