1
JEE Main 2023 (Online) 11th April Evening Shift
+4
-1

A solution is prepared by adding $$2 \mathrm{~g}$$ of "$$\mathrm{X}$$" to 1 mole of water. Mass percent of "$$\mathrm{X}$$" in the solution is :

A
20%
B
10%
C
2%
D
5%
2
JEE Main 2023 (Online) 10th April Evening Shift
+4
-1

Given below are two statements: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$

Assertion A : $$3.1500 \mathrm{~g}$$ of hydrated oxalic acid dissolved in water to make $$250.0 \mathrm{~mL}$$ solution will result in $$0.1 \mathrm{~M}$$ oxalic acid solution.

Reason $$\mathbf{R}$$ : Molar mass of hydrated oxalic acid is $$126 \mathrm{~g} \mathrm{~mol}^{-1}$$

In the light of the above statements, choose the correct answer from the options given below.

A
Both A and R are true but R is NOT the correct explanation of A
B
A is true but R is false
C
Both A and R are true and R is the correct explanation of A
D
A is false but R is true
3
JEE Main 2023 (Online) 10th April Evening Shift
+4
-1

Match List I with List II

List - I List - II ($$\Delta_0$$)
A. 16 g of $$\mathrm{CH_4~(g)}$$ I. Weighs 28 g
B. 1 g of $$\mathrm{H_2~(g)}$$ II. $$60.2\times10^{23}$$ electrons
C. 1 mole of $$\mathrm{N_2~(g)}$$ III. Weighs 32 g
D. 0.5 mol of $$\mathrm{SO_2~(g)}$$ IV. Occupies 11.4 L volume of STP

Choose the correct answer from the options given below:

A
A-II, B-III, C-IV, D-I
B
A-II, B-IV, C-I, D-III
C
A-I, B-III, C-II, D-IV
D
A-II, B-IV, C-III, D-I
4
JEE Main 2023 (Online) 10th April Morning Shift
+4
-1

The number of molecules and moles in 2.8375 litres of O$$_2$$ at STP are respectively

A
1.505 $$\times$$ 10$$^{23}$$ and 0.250 mol
B
7.527 $$\times$$ 10$$^{22}$$ and 0.250 mol
C
7.527 $$\times$$ 10$$^{23}$$ and 0.125 mol
D
7.527 $$\times$$ 10$$^{22}$$ and 0.125 mol
EXAM MAP
Medical
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