1
JEE Main 2023 (Online) 24th January Evening Shift
Numerical
+4
-1
Change Language

One mole of an ideal monoatomic gas is subjected to changes as shown in the graph. The magnitude of the work done (by the system or on the system) is __________ J (nearest integer)

JEE Main 2023 (Online) 24th January Evening Shift Chemistry - Thermodynamics Question 37 English

Given ; $$\log2=0.3$$

$$\ln10=2.3$$

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2
JEE Main 2023 (Online) 24th January Evening Shift
Numerical
+4
-1
Change Language

Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is ____________.

JEE Main 2023 (Online) 24th January Evening Shift Chemistry - Thermodynamics Question 38 English

A. $$\mathrm{T_4 > T_3 > T_2 > T_1}$$

B. The black body consists of particles performing simple harmonic motion.

C. The peak of the spectrum shifts to shorter wavelength as temperature increases.

D. $${{{T_1}} \over {{v_1}}} = {{{T_2}} \over {{v_2}}} = {{{T_3}} \over {{v_3}}} \ne $$ constant

E. The given spectrum could be explained using quantisation of energy.

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3
JEE Main 2023 (Online) 24th January Morning Shift
Numerical
+4
-1
Change Language

For independent process at 300 K

Process $$\mathrm{\Delta H/kJ~mol^{-1}}$$ $$\mathrm{\Delta S/J~K^{-1}}$$
A $$-25$$ $$-80$$
B $$-22$$ 40
C 25 $$-50$$
D 22 20

The number of non-spontaneous process from the following is __________

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4
JEE Main 2022 (Online) 29th July Morning Shift
Numerical
+4
-1
Change Language

When 600 mL of 0.2 M HNO3 is mixed with $$400 \mathrm{~mL}$$ of 0.1 M NaOH solution in a flask, the rise in temperature of the flask is ___________ $$\times 10^{-2}{ }\,^{\circ} \mathrm{C}$$.

(Enthalpy of neutralisation $$=57 \mathrm{~kJ} \mathrm{~mol}^{-1}$$ and Specific heat of water $$=4.2 \,\mathrm{JK}^{-1} \mathrm{~g}^{-1}$$) (Neglect heat capacity of flask)

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