Doubtclip is an AI tutor that turns any homework or exam doubt into a step-by-step whiteboard video lesson with diagrams, formulas, and voice explanation.

Which subjects and exams does it support?

It supports Physics, Chemistry, Mathematics/Calculus and related STEM doubts for school boards, JEE, NEET, and global high-school / undergrad practice.

How do I get a video solution?

Upload a photo of the question or paste the text, sign in, and Doubtclip generates a whiteboard-style explanation video you can watch and share.

Is Doubtclip available worldwide?

Yes. Doubtclip is a web app for students globally. Lessons are available in English and Hinglish.

Thermodynamics

JEE Main level, single correct, medium

1 of 3

Question 1 of 3

A reaction is spontaneous at all temperatures if:

Show answer and solution

Answer: (A) $\Delta H < 0, \Delta S > 0$

\Delta G = \Delta H - T\Delta S

. When

\Delta H < 0

and

\Delta S > 0

\Delta G

is always negative regardless of temperature.

JEE Main question paper PDF

Open a shift to read the full paper on this page, or download it.

JEE Main 2025 Apr 2 Shift 1 question paper

Open Download PDF

Opening paper…

Explain it as a whiteboard videoStep-by-step, in Hinglish or English. Your first video needs no login.Solved it on paper but got it wrong?Upload a photo of your working. Mistake Doctor marks the exact line that broke.

Revise Chemical Thermodynamics firstFormula sheet, solved examples and the traps students fall into.

More Chemistry practice

ThermodynamicsIn an isothermal reversible expansion, $2\,\text{moles}$ of an ideal gas expand from $V_1 = 1\,\text{L}$ to $V_2 = 10\,\text{L}$ at $300\,\text{K}$ . Work done is (in J, take $R=8.314$ , $\ln 10 = 2.303$ ):
ThermodynamicsFor an isolated system, the change in internal energy $\Delta U$ is always:
Chemical BondingAccording to Molecular Orbital Theory, which of the following species has the highest bond order?
Coordination CompoundsThe magnetic moment of $[Fe(CN)_6]^{3-}$ complex ion according to spin-only formula is approximately:
Organic ChemistryToluene on reaction with $CrO_2Cl_2$ in $CS_2$ followed by hydrolysis gives benzaldehyde. This reaction is known as:
Chemical KineticsFor a first order reaction, the time required for $99.9\%$ completion is related to its half-life $t_{1/2}$ by:

JEE Main Chemistry practice question on Thermodynamics, with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.