Thermodynamics - India Study Solution Test Series, Chemistry objective questions for NEET, JEE Main other entrance exams

THERMODYNAMICS

Chemistry India Study Solution Test Series (Confidence Booster)

NEET, JEE Main, JEE Advanced, IIT, AIIMS, NTSE | MBBS, BDS Admission Test

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Below you will get carefully selected, 10 MCQ practice questions in our each Test Series with hints & solutions (given at the end) from our Chemistry Solutions exclusively from - Thermodynamics, Thermo Chemistry.

Each series or set is a combination of 10 typically important some basic and also advanced level questions for NEET-UG, JEE Main & Advanced (IIT) AIIMS, IMS BHU, JIPMER, COMEDK, MBBS Admission Tests, Engineering Entrance Exams, NEST and other such competitive exams.

Please scroll down for NEET and JEE syllabus of Thermodynamics chapter.

Chemistry Practice Questions: Thermodynamics (Thermo chemistry)

MCQ Test Series – Set 2 (Q. No 11-20)

Question 11: A process in which no heat change takes place is called

a. An isothermal process

b. An adiabatic process

c. An isobaric process

d. An isochoric process 

Question 12: When a solid melts there is

a. An increase in enthalpy

b. A decrease in enthalpy

c. No change in enthalpy

d. A decrease in internal energy

Question 13: The change in enthalpy that takes place when one mole of the compound is formed from its elements is called

a. Heat of formation

b. Heat of fusion

c. Heat of combustion

d. Heat of sublimation

Question 14: Hess’s law states that

a. The standard enthalpy of an overall reaction is the sum of the enthalpy changes in individual reaction

b. Enthalpy of formation of compound is same as the enthalpy of decomposition of the compound into constituent elements, but with opposite sign

c. At constant temperature the pressure of a gas is inversely proportional to its volume

d. The mass of a gas dissolved per lit of a solvent is proportional to the pressure of the gas in equilibrium with the solution

Question 15: Hess’s law is used to determine

a. Heat of formation of substances which are otherwise difficult to calculate

b. Heat of transition

c. Heat of dissociation

d. All of these

Question 16: A certain mass of gas is expanded from (1L, 10 atm) to (4L, 5 atm) against a constant external pressure of 1 atm. If initial temperature of gas is 300K and the heat capacity of process is 50 J/^oC. Then the enthalpy change during the process is (1 L ~ 100 J)

a. ∆H = 15 kJ

b. ∆H = 15.7 kJ

c. ∆H = 14.4 kJ

d. ∆H = 14.7 kJ

Question 17: The enthalpies of elements under the following conditions are assumed to be

a. Zero at 298K and 1 atm

b. Unity at 298K and 1 atm

c. Zero at 273K and 1 atm

d. Unity at 273K and 1 atm

Question 18: If the total enthalpy of reactants and products is H_R and H_P respectively, then for exothermic reaction

a. H_R = H_P

b. H_R < H_P

c. H_R > H_P

d. H_P ≥ H_R

Question 19: The first law of thermodynamics is represented by the equation:

a. ∆E = Q - W

b. ∆E = Q + W

c. W = Q + ∆E

d. Q = W + ∆E

Question 20: Enthalpy of neutralisation of all strong acids and strong bases has the same value because

a. Neutralisation leads to the formation of a salt and water

b. Strong acid and bases are iconic substances

c. Acids always furnish H⁺ ions and bases always furnish OH^- ions

d. The net chemical change involves the combination of 1 mol of H⁺ ions and 1 mol OH^- ions to form water.

Thermodynamics (Syllabus for NEET and JEE):

Fundamentals of thermodynamics: System and surroundings, extensive and intensive properties, state functions, types of processes. Thermal equilibrium, Zeroth law of thermodynamics, concept of temperature. First  law  of  thermodynamics: internal  energy  and  enthalpy,  heat  capacity  and  specific  heat, measurement of U and H, Hess’s law of constant heat summation. Enthalpies of bond dissociation, combustion, formation, atomization, sublimation, phase transition, ionization, solution and dilution. Introduction of entropy as state function. Second law of thermodynamics: Gibbs energy change for spontaneous and non-spontaneous processes, reversible and irreversible processes, criteria for equilibrium and spontaneity. Carnot engine and its efficiency. Third law of thermodynamics: Brief introduction.

India Study Solution - Hints and Solutions Chemistry MCQ Test Series

Thermodynamics

Solutions of Chemistry Test Series (MCQ) – Set 2 (Q. No.11–20)

https://www.indiastudysolution.com

Answer 11: b. Answer 12: a. Answer 13: a. Answer 14: a. Answer 15: d.

Answer 16: b.

Hint:

∆H = ∆E + ∆(PV) and

∆E = q + W = (50 x 300 – 3 x 100) J [as T_f = 2 x 300 K = 600 K] = 14.7 kJ

∆H = 14700 + 10 x 100 = 15700 J = 15.7 kJ

Answer 17: a. Answer 18: c. Answer 19: b. Answer 20: d.

 THERMODYNAMICS - India Study Solution Chemistry Test Series Questions

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Thermodynamics - Free online Chemistry MCQ Test Series, Practice Questions with Solutions for JEE, NEET, Engineering and Medical Admission Tests

Chemistry Solved MCQ Test Series, Practice Questions

NEET, IIT JEE Main, AIIMS, NTSE

Welcome to your own site India Study Solution Below you will get carefully selected 10 MCQ practice questions in our each Test Series with hints & solutions (given at the end) from Chemistry Solutions chapter - Thermodynamics, Thermochemistry.
All these are typically important questions for NEET-UG, JEE Main & Advanced (IIT) AIIMS, JIPMER, COMEDK, MBBS Admission Tests, Engineering Entrance Exams, NEST and other such competitive exams.

Thermodynamics (Syllabus for NEET and JEE):

Fundamentals of thermodynamics: System and surroundings, extensive and intensive properties, state functions, types of processes. Thermal equilibrium, Zeroth law of thermodynamics, concept of temperature. First  law  of  thermodynamics: internal  energy  and  enthalpy,  heat  capacity  and  specific  heat, measurement of U and H, Hess’s law of constant heat summation. Enthalpies of bond dissociation, combustion, formation, atomization, sublimation, phase transition, ionization, solution and dilution. Introduction of entropy as state function. Second law of thermodynamics: Gibbs energy change for spontaneous and non-spontaneous processes, reversible and irreversible processes, criteria for equilibrium and spontaneity. Carnot engine and its efficiency. Third law of thermodynamics: Brief introduction.

Chemistry Practice Questions: Thermodynamics (Thermochemistry)MCQ Test Series – Set 1 (Q. No. 1-10)

Question 1: Which of the following statements is correct?

a. Only internal energy is a state function but not work.

b. Only work is a state function but not internal energy.

c. Both internal energy and work are state functions.

d. Neither internal energy nor work is a state function.

Question 2: The amount of water that can be dissociated by the amount of heat liberated when 49 g H₂SO₄ and 20 g NaOH are mixed and reacted in aqueous solution is:

a. 1.803

b. 3.58

c. 0.895

d. 17.9

Question 3: A sample of 2 kg of helium (assumed ideal) is taken through the process ABC and another sample of 2 kg of the same gas is taken through the process ADC. Then the temperature of the states A and B are (Given R = 8.3 joules/mol K):

  

a. T_A = 120.5K, T_B = 120.5K

b. T_A = 241 K, T_B = 241 K

c. T_A = 120.5 K, T_B = 241 K

d. T_A = 241 K, T_B = 482 K

Question 4: What is the work done against the atmosphere when 25 grams of water vaporises at 373 K against a constant external pressure of atm ? Assume that steam obeys perfect gas laws. Given that the molar enthalpy of vaporization is 9.72 kcal/mole, what is the change of internal energy in the above process?

a. 1294.0 cals, 11247 cals

b. 921.4 cals, 11074 cals

c. 1024.8 cals, 12470.6 cals

d. 1129.3 cals, 10207 cals

Question 5: Warming ammonium chloride with sodium hydroxide in a test tube is an example of:

a. Closed system

b. Isolated system

c. Open system

d. None of these

Question 6: Adiabatic process involves

a. Q = 0

b. ∆E = 0

c. ∆W = 0

d. ∆V = 0

Question 7: A gas expands from 10 litres to 20 litres against a constant external pressure of 10 atm. The pressure-volume work done by the system is

a. 100 L atm

b. -100 L atm

c. 10 L atm

d. -10 L atm

Question 8: In an isothermal expansion of a gaseous sample the correct relation is (consider w (work) with sign according to new IUPAC convention)

[The reversible and irreversible processes are carried out between same initial and final states]

a. w_rev  > w_irrev

b. w_irrev  > w_rev

c. q_rev< q_irrev

d. cannot be predicted

Question 9: A tightly closed thermoflask contains some ice cubes. This constitutes

a. closed system

b. open system

c. isolated system

d. Non-thermodynamic system

Question 10: The process CO₂ (g) + H₂O → 2H⁺ (aq) + CO₃^-2 (aq),

∆H = +2000J taking place in a closed vessel is accompanied with [given S⁰ of CO₂, H₂O, H⁺ (aq) & CO₃^-2(aq) = 213, 70, 0 & 57J/Mol/K]

a. DS_sys = -340 J/K

b. DS_sur ≈ -7KJ/K

c. DS_total = -333 J/K

d. DS_sys = -340 J/K

India Study Solution - Hints and Solutions Chemistry MCQ Test Series

Thermodynamics

Solutions of Chemistry Test Series (MCQ) – Set 1 (Q. No.1 –10)

https://www.indiastudysolution.com

Answer 1: a. Answer 2: a.

Answer 3: c. Hint:

T₂ = 4T­­₁

P_A V_A = nRT_A

5 x 10 = [(2 x 1000) ÷ 2] x 0.082 T_A

or, T_A = 120.5,

at constant volume, (P_A / T_A) = (P_B / T_B)

T_B = P_B.T_A / T_A = 241 K.

Answer 4: c. Hint:

Mole of H₂O = 1.39

Pv = nRT

1 x v = 1.39 x 0.082 x 373

v = 42.8.

w = Pext. dv = 1 x [42.8] atm x lit

= (– 42.8 x 101.325) J = [–(42.8 x 101.325) ÷ 4.2] cal

= 1024.8 cal

∆H = ∆E + (P∆v) = 12470.6 cal/s.

Answer 5: c. Answer 6: c. Answer 7: b. Answer 8: b. Answer 9: c. Answer 10: a.

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45 lakh candidates stuck as JEE, NEET other major Entrance Tests deferred due to Nation-wide lockdown amid Corona Virus outbreak

As many as 45 lakh students preparing for major competitive examinations scheduled over the next three months are stranded as the nationwide lockdown in the wake of corona virus outbreak has upset the examination calendar by at least a month.

JEE Advanced, JEE Main, NEET, UGC-NET, CSIR UGC-NET, Indian Council of Agricultural Research (ICAR) scheduled in April, May and June 2020 will be affected by this lockdown.

Indian Government, NTA has notified that JEE and NEET Entrance Tests have been postponed to the last week of May keeping in mind the three week National lockdown due to Corona virus outbreak in India.

The National Eligibility cum Entrance Test (NEET) whose marks are used for admission in Medical Colleges across the country was scheduled to be held on 3rd May. As of now NEET is proposed to be held in the last week of May’20, exact dates will be announced later after assessing the situation due to corona virus pandemic.

Similarly the Engineering Entrance Test JEE Main has been postponed till last week of may as per the official statement issued yesterday 27^th March’20 in view of the current situation prevailing in the country due to Corona virus outbreak. The exam conducting agency NTA (National Testing Agency) has released a notification in which it has intimated to candidates that the examination dates will be announced letter after assessing the situation.

NEET is held annually for admission to undergraduate medical courses MBBS, BDS and Ayush programs through this examination. Admission to veterinary courses are also done on the basis of NEET score.

JEE main is held for admission to undergraduate engineering programs at NITs, IITs, other centrally funded technical institutions, cftri Institutions funded by participating State Governments. The exam is held twice a year and candidates are allowed to appear for both these examinations.

As of now, both NEET and JEE have been postponed till further dates are announced by NTA. These examinations were scheduled to be held in April and May 2020. NTA is yet to announce about other examinations.

Free online Physics MCQ Test Series, Practice Questions with Solutions on Kinematics for JEE, NEET, IIT, AIPMT

Welcome back to 'India Study Solution’ Physics MCQ Test Series / Practice Questions Section, This section contains MCQ and Objective Test Series each set containing 10 most important questions with hints & solutions from the chapter KINEMATICS (syllabus included below).

Physics Notes and Study Materials with Key Points to remember and important Formulae and more on Kinematics - Motion in a straight line, Uniform and Non-uniform acceleration, Relative velocity, Scalars and Vectors and all topics in syllabus (provided at the end of hints / solutions) will be published separately (link for which will be provided here) 

Kinematics: Physics Guide and Solution

MCQ Test Series – Set 3 (Q. No.21-30)

Question 21: The speed-time graph of an object moving along a solid curve is shown in the adjacent fig. The distance traversed by the object from t - 0 to t = 3 is -

a. 10/2 m

b. 10/4 m

c. 10/3 m

d. 10/5 m

Question 22: The slope of velocity-time graph for uniform motion of an object is -

a. unity

b. zero

c. infinite

d. more than unity with some finite value

Question 23: A point mass starts moving in a straight line with constant acceleration f from rest at t =0. At time t = 2s, the acceleration changes the sign, remaining the same in magnitude. The mass returns to the initial position at time t = t₀ after start of motion. Here t₀ is:

a. 4s

b. (4 + 2√2)s

c. (2 + 2√2)s

d. (4 + 4√2)s

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Question 24: The displacement of a body is given by s = (gt²)/2, where ‘g’ is acceleration due to gravity. The velocity of the body at any instant ‘t’ is given by -  

a. (gt³)/6

b. (gt²)/2

c. gt

d. (gt)/2

Question 25: Two particles start from rest simultaneously and are equally accelerated. Throughout the motion, the relative velocity of one with respect to other is -   

a. zero

b. non-zero and directed parallel to acceleration

c. non-zero and directed opposite to acceleration

d. directed perpendicular to the acceleration

Question 26: A particle moves with uniform acceleration and v₁, v₂ and v₃ denote the average velocities in the three successive intervals of time t₁, t₂ and t₃. Which of the following relations is correct?

a. (v₁ – v₂) : (v₂ – v₃) = (t₁ – t₂) : (t₂ + t₃)

b. (v₁ – v₂) : (v₂ – v₃) = (t₁ + t₂) : (t₂ + t₃)

c. (v₁ – v₂) : (v₂ – v₃) = (t₁ – t₂) : (t₁ – t₃)

d. (v₁ – v₂) : (v₂ – v₃) = (t₁ – t₂) : (t₂ – t₃)

Question 27: The vertical height of point P above the ground is twice of that of Q. A stone is projected downward with a speed of 5 m/s from P and at the same time another stone is projected upward with the same speed from Q. Both stone reach the ground simultaneously, then -

a. PQ = 30 m

b. Time of flight of stones = 3 s

c. Both (a) and (b) are correct

d. Both (a) and (b) are wrong

Question 28: Which of the following position-time graphs shows an object moving with negative acceleration?

Question 29: The total vertical distance covered by a freely falling body in a given time is directly proportional to -

a. time

b. square of time

c. square of acceleration due to gravity

d. product of the time and acceleration due to gravity

Question 30: A 100 m long train crosses a man travelling at 5 km/h, in opposite direction, in 7.2 s, then the velocity of the train is -

a. 40 km/s

b. 25 km/s

c. 20 km/s

d. 45 km/s

India Study Solution

Physics Guide and Solution: KINEMATICS

Hints & Solutions of Practice Questions / MCQ Test Series – Set 3 (Q. No.21–30)

Answer 21: b.  Answer 22: b. 

Answer 23: b. 

Answer 24: c. 

Answer 25: a. (Hint: They will have the same velocity at all instants and hence, their relative velocity is zero.)

Answer 26: b. 

Answer 27: c.

Answer 28: c.  Answer 29: b.

Answer 30: d.

Kinematics Syllabus for JEE Main and NEET:

Frame of reference, Motion in a straight line, Uniform and Non-uniform motion, Average speed and instantaneous velocity, Uniformly accelerated motion, Velocity - Time, Position - Time graphs, Relations for uniformly accelerated motion, Relative velocity, Motion in a plane.

Scalars and Vectors, Vector addition and subtraction, Zero vector, Scalar and vector products, Unit vector, Resolution of a vector, Position and Displacement vector, General vector and notation, Equality of vector, Multiplication of vector and a real number.

Please click on the link below for more solved Test Series on Kinematics, confidence boosting practice questions with hints and answers for preparing NEET, AIPMT, JEE Main, Medical, Dental Entrance Exams, Engineering Entrance Exams; MBBS and Engineering Admission Tests, NTSE, KVPY and other competitive exams.

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KINEMATICS - India Study Solution Test Series Questions

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