1
JEE Main 2023 (Online) 25th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

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
$$\mathrm{Ca{(OH)_2},NH_4^ \oplus ,{(N{H_4})_2}C{O_3}}$$
B
$$\mathrm{CaC{l_2},NH_4^ \oplus ,{(N{H_4})_2}C{O_3}}$$
C
$$\mathrm{CaC{l_2},N{H_3},N{H_4}HC{O_3}}$$
D
$$\mathrm{Ca{(OH)_2},N{H_3},N{H_4}HC{O_3}}$$
2
JEE Main 2023 (Online) 25th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

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 :

A
$$\mathrm{{X_2}{Y_{1.5}}}$$
B
$$\mathrm{{X_{3}}{Y_2}}$$
C
$$\mathrm{X{Y_{2.5}}}$$
D
$$\mathrm{{X_{2.5}}Y}$$
3
JEE Main 2023 (Online) 25th January Morning Shift
Numerical
+4
-1
Change Language

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)

Your input ____
4
JEE Main 2023 (Online) 25th January Morning Shift
Numerical
+4
-1
Change Language

A litre of buffer solution contains 0.1 mole of each of NH$$_3$$ and NH$$_4$$Cl. On the addition of 0.02 mole of HCl by dissolving gaseous HCl, the pH of the solution is found to be _____________ $$\times$$ 10$$^{-3}$$ (Nearest integer)

[Given : $$\mathrm{pK_b(NH_3)=4.745}$$

$$\mathrm{\log2=0.301}$$

$$\mathrm{\log3=0.477}$$

$$\mathrm{T=298~K]}$$

Your input ____
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