1
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

The work done during reversible isothermal expansion of one mole of hydrogen gas at $$25^{\circ} \mathrm{C}$$ from pressure of 20 atmosphere to 10 atmosphere is (Given $$\mathrm{R}=2.0 \mathrm{~cal} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$$)

A
0 calorie
B
$$-$$413.14 calories
C
413.14 calories
D
100 calories
2
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

Consider the following reaction in a sealed vessel at equilibrium with concentrations of $$\mathrm{N}_2=3.0 \times 10^{-3} \mathrm{M}, \mathrm{O}_2=4.2 \times 10^{-3} \mathrm{M}$$ and $$\mathrm{NO}=2.8 \times 10^{-3} \mathrm{M}$$.

$$2 \mathrm{NO}_{(\mathrm{g})} \rightleftharpoons \mathrm{N}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})}$$

If $$0.1 \mathrm{~mol} \mathrm{~L} \mathrm{~L}^{-1}$$ of $$\mathrm{NO}_{(\mathrm{g})}$$ is taken in a closed vessel, what will be degree of dissociation ($$\alpha$$) of $$\mathrm{NO}_{(\mathrm{g})}$$ at equilibrium?

A
0.00889
B
0.0889
C
0.8889
D
0.717
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

A compound X contains $$32 \%$$ of A, $$20 \%$$ of B and remaining percentage of C. Then, the empirical formula of $$\mathrm{X}$$ is :

(Given atomic masses of A=64 ; B=40 ; C=32 u)

A
$$\mathrm{A}_2 \mathrm{BC}_2$$
B
$$\mathrm{ABC}_3$$
C
$$\mathrm{AB}_2 \mathrm{C}_2$$
D
$$\mathrm{ABC}_4$$
4
NEET 2024
MCQ (Single Correct Answer)
+4
-1
Change Language

In a vernier callipers, $$(N+1)$$ divisions of vernier scale coincide with $$N$$ divisions of main scale. If $$1 \mathrm{~MSD}$$ represents $$0.1 \mathrm{~mm}$$, the vernier constant (in $$\mathrm{cm}$$) is:

A
$$\frac{1}{10 \mathrm{~N}}$$
B
$$\frac{1}{100(N+1)}$$
C
$$00 \mathrm{~N}$$
D
$$10(N+1)$$
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