JEE Main 2020 (Online) 6th September Evening Slot | Thermodynamics Question 95 | Chemistry

For a reaction,
4M(s) + nO₂(g) $$ \to $$ 2M₂O_n(s)
the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which :

the free energy change shows a change from negative to positive value

the slope changes from positive to negative

the slope changes from negative to positive

the slope changes from positive to zero

JEE Main 2020 (Online) 5th September Evening Slot

MCQ (Single Correct Answer)

-1

Lattice enthalpy and enthalpy of solution of NaCl are 788 kJ mol^–1, and 4 kJ mol^–1, respectively.
The hydration enthalpy of NaCl is :

–780 kJ mol^–1

–784 kJ mol^–1

780 kJ mol^–1

784 kJ mol^–1

JEE Main 2020 (Online) 4th September Evening Slot

MCQ (Single Correct Answer)

-1

Five moles of an ideal gas at 1 bar and 298 K is expanded into vacuum to double the volume. The work done is :

Zero

-RT $$\ln {{{V_2}} \over {{V_1}}}$$

C_V (T₂ – T₁)

– RT (V₂ – V₁)

JEE Main 2020 (Online) 4th September Evening Slot

MCQ (Single Correct Answer)

-1

The process that is NOT endothermic in nature is :

Ar(g) + e^- $$ \to $$ Ar^-(g)

H(g) + e^- $$ \to $$ H^-(g)

Na(g) $$ \to $$ Na⁺(g) + e^-

O^-(g) + e^- $$ \to $$ O^2-(g)

PREVIOUS NEXT

Questions Asked from Thermodynamics (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

JEE Main Subjects

Physics

Mechanics

Units & Measurements Vector Algebra Motion in a Straight Line Motion in a Plane Circular Motion Laws of Motion Work Power & Energy Center of Mass and Collision Rotational Motion Properties of Matter Heat and Thermodynamics Simple Harmonic Motion Waves Gravitation

Electricity

Electrostatics Current Electricity Capacitor Magnetic Effect of Current Magnetic Properties of Matter Electromagnetic Induction Alternating Current Electromagnetic Waves

Optics

Geometrical Optics Wave Optics

Modern Physics

Atoms and Nuclei Dual Nature of Radiation Semiconductor Communication Systems

Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry Structure of Atom Redox Reactions Gaseous State Chemical Equilibrium Ionic Equilibrium Solutions Thermodynamics Electrochemistry Chemical Kinetics and Nuclear Chemistry Solid State Surface Chemistry

Inorganic Chemistry

Periodic Table & Periodicity Chemical Bonding & Molecular Structure Isolation of Elements Hydrogen s-Block Elements p-Block Elements d and f Block Elements Coordination Compounds Environmental Chemistry

Organic Chemistry

Basics of Organic Chemistry Hydrocarbons Haloalkanes and Haloarenes Alcohols, Phenols and Ethers Aldehydes, Ketones and Carboxylic Acids Compounds Containing Nitrogen Polymers Biomolecules Chemistry in Everyday Life Practical Organic Chemistry

Mathematics

Algebra

Sets and Relations Logarithm Quadratic Equation and Inequalities Sequences and Series Mathematical Induction Binomial Theorem Matrices and Determinants Permutations and Combinations Probability Vector Algebra 3D Geometry Complex Numbers Statistics Mathematical Reasoning

Trigonometry

Trigonometric Ratio and Identites Trigonometric Equations Inverse Trigonometric Functions Properties of Triangle Height and Distance

Coordinate Geometry

Straight Lines and Pair of Straight Lines Circle Parabola Ellipse Hyperbola

Calculus

Functions Limits, Continuity and Differentiability Differentiation Application of Derivatives Indefinite Integrals Definite Integration Area Under The Curves Differential Equations