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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
For a reaction `3A rarr 2B`, following graph is obtained, calculate rate of reaction when concentration of A is `0.2M`. A. `4 xx 10^(-4) M min.^(-1)`B. `(16)/(9) xx 10^(-4)M min.^(-1)`C. `1.6 xx 10^(-3) M min.^(-1)`D. `(16)/(3) xx 10^(-3) M min.^(-1)` |
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Answer» Correct Answer - B |
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| 102. |
Every reaction whether started by taking only reactants or by taking only products or any other combination always has a tendency to move towards equilibrium. Hence, equilibrium state can be considered as the one with most stable composition. In case of isomers, based on stability data position of equilibrium can als be decided. Which of the following options correctly represent `DeltaG_(f)^(@)` of cis but-2-ene, trans but-2-ene and but-1-ene in kJ/mole?A. 63,66,72B. 66,63,72C. 72,63,66D. 66,72,63 |
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Answer» Correct Answer - B |
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| 103. |
In each situation of column-I a process ABC is given for fixed amount of an ideal gas. Match each of column-I with correct result in column-II. `(#3GRB_PHY_CHM_P2_V03_QB_C13_E01_405_Q01.png" width="80%"> |
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Answer» Correct Answer - a,p,q; b-r,s; c-p,q; d-p |
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| 104. |
Solubility curves of four ionic salts `X,Y,Z,W` are given below. In which case the value of `DeltaH_(sol) lt 0`? A. XB. YC. ZD. W |
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Answer» Correct Answer - A |
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| 105. |
The curve C is for the gas X at 273 K.Choose the correct statement (s). A. Curve A may be of a heavier gas but at same temperatureB. Curve B may be of the same gas but at 373 KC. Curve A may be of the same gas but at 373 KD. Curve B may be of the lighter gas but at same temperature. |
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Answer» Correct Answer - A::B::D |
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| 106. |
Consider the figure and mark the correct option. A. Activation energy of forward reaction is `E_(1)+E_(2)` and product is less stable than reactant.B. Activation energy of forward reaction is `E_(1)+E_(2)` and product is more stable than reactant.C. Activation energy of both forward and backward reaction is `E_(1)+E_(2)` and reactant is more stable than product.D. Activation energy of backward reaction if `E_(1)` and product is more stable than reactant. |
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Answer» Correct Answer - A |
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| 107. |
A graph of volume of hydrogen released us. Time for the reaction between zinc and dil. HCI is given in figure below On the basis of this, mark the correct option. A. Average rate upto 40 seconds is `(V_(3)-V_(2))/(40)`B. Avergae rate upto 40 seconds is `(V_(3)-V_(2))/(40 - 30)`C. Average rate upto 40 seconds is `(V_(3))/(30)`D. Average rate upto 40 seconds is `(V_(3) -V_(1))/(40 - 20)` |
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Answer» Correct Answer - C |
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| 108. |
Which of the following statement(s) are true about Z us P graph for a real gas at a given temperature. A. `(dZ)/(dP) rarr 0` as `P rarr 0` for must real gasesB. `(dZ)/(dP) =-` ive as `P rarr 0` for most real gasesC. `(dZ)/(dP) rarr 0` at a pressure where repulsibe and attractive forces are comparableD. `(dZ)/(dP)= +` ive for real gases at extermely high pressure. |
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Answer» Correct Answer - B::D |
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| 109. |
From the graph of `(d)/(P)` us P at a constant temperature of 300 K. calculate molar mass of the gas. |
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Answer» Correct Answer - 4 |
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| 110. |
A 1kg real gas is liquified at temperature 300 K as shown in diagram. Select the correct statement. A. 2 atm is vapour pressure of liquid at 300 KB. Density of gas when V equals to 20 litre, `0.1 gm//ml`C. Density of gas when V equals to 10 litre, `0.05 gm//ml`D. Density of liquid when V equals to 1 litre, `1 gm//ml` |
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Answer» Correct Answer - A::C::D |
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| 111. |
Consider the following (P-T) graph for a fixed mass of gas: Correct P-V graph as: A. B. C. D. |
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Answer» Correct Answer - C |
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| 112. |
For a H-like species if area `A_(1)` is of ground state orbit and area `A_(n)` is of nth orbit, then, the plot of `(A_(n))/(A_(1))` us `n^(2)` looks like:A. B. C. D. |
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Answer» Correct Answer - B |
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| 113. |
For a fixed amount of an ideal gas P us T plot is given as shown. Identify the correct option. A. The change from A to B should be isochoricB. Volume first increases reached maxima and then decreasesC. `PV = nRT` is not applicableD. None of the statements are correct |
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Answer» Correct Answer - D |
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| 114. |
The graph given below shows the P-V plot for a process on an ideal gas. Select the correct statement. A. Enthalpy content of the gas is constantly increasing and the process is carried out slowlyB. Enthalpy content of the gas first increases then decreases and the process is quasistaticlyC. Enthalpy content of the gas is constant and the process taken infinite amount of time for completionD. Enthalpy content first decreases then increases and the process is reversible |
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Answer» Correct Answer - A |
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| 115. |
Which of the following options correctly match the graph of Z us P at normal temperature with gases ? A. `I-H_(2),II-He, III-CO_(2),IV -NH_(3)`B. `I-He,II-H_(2),III-NH_(3),IV-CO_(2)`C. `I-H_(2),II-He,III-NH_(3),IV-CO_(2)`D. `I-He,II-H_(2),II-CO_(2),IV-NH_(3)` |
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Answer» Correct Answer - A |
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| 116. |
With refernce to above graph, which of the following is/are incorrect ?A. `P_(A) = P_(B) = P_(C)`B. Pressure first increases then decreasesC. `P_(C) gt P_(A)`D. `P_(B) lt P_(A)` |
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Answer» Correct Answer - A::B::C |
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| 117. |
Consider the graph given in the above questions. Which of the following options does not show instanetaneous rate of reaction at 40 th second ?A. `(V_(5)-V_(2))/(50 - 30)`B. `(V_(4)-V_(2))/(50 -30)`C. `(V_(3)-V_(2))/(40 - 30)`D. `(V_(3)-V_(1))/(40 - 20)` |
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Answer» Correct Answer - B |
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| 118. |
The above graph cannot be of:A. 3sB. `4p_(x)`C. `3p_(x)`D. `5d_(xy)` |
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Answer» Correct Answer - C |
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| 119. |
Chemicals A and B each initially at `20^(@)C` react exothermically. A graph of the final temperature reached by mixing equimolar solutions of A and B to a total of `100 mL` is given below. According to this graph, in what mole ratio does A and B react ? A. `2 :1`B. `3:1`C. `4:1`D. `3:2` |
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Answer» Correct Answer - B |
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| 120. |
For a binary ideal liquid solution, the variation in total vapour pressure us composition of solution is given by which of the curves ?A. B. C. D. |
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Answer» Correct Answer - A::D |
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| 121. |
With the help of following phase diagram, select the correct statements. A. Mole fraction of B in vapour at pressure `P_(1)` for solution `Z_(2)` is 0.5B. Mole fraction of A in liquid at presure `P_(3)` for solution `Z_(2)` is 0.4C. Mole fraction of B in liquid at pressure `P_(1)` for solution `Z_(2)` is 0.75D. Mole fraction of B in liquid at pressure `P_(2)` for solution `Z_(1)` is 0.4 |
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Answer» Correct Answer - A::B::C |
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| 122. |
Which of the following statements is (are) true ?A. Graph between `(1)/(V(L))` us P (atm) for 1 mole of gas at 300 K has a slope between 0 and 1B. Isobar between log V us log T has varying slope depending upon the values of n and PC. Isobars between log V us log T has varying intercepts on y and x axis depending upon the values of n and P.D. Isochore between PT us P for constant n is a straight line |
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Answer» Correct Answer - A::C |
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| 123. |
For a fixed mass of gas at constant volume, which of the following statements is/are (not ) correct ?A. Plot of pressure vs celsius temperature is linear with intercept zeroB. Plot of pressure us kelvin temperature is linear with a nonzero interceptC. Plot of p us T is linear with a positive slopeD. Plot of p us T is linear with a negative slope |
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Answer» Correct Answer - A::B::D |
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| 124. |
The Arrhenius relationship of two different reactions is shown below. Which reaction is faster at a lower temperature and which is more sensitive to changes of temperature ? A. B faster, A more sensitiveB. B in both casesC. A in both casesD. A is faser, B more sensitive |
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Answer» Correct Answer - A |
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| 125. |
How can be rate of reaction at a specific in the be determined from a graph of concentration against time ?A. Concentration at that time divided by the timeB. Logarithm of the concentration divided by the timeC. Absolute value of the slope of the graph at that timeD. Logarithm of the slope divided by the time |
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Answer» Correct Answer - C |
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| 126. |
Consider the decay of P to A and B by two parallel first order reactions as shown in Fig. Given Which of the following is (are) true ? A. `a = E_(B)`B. `b = E_(A)`C. `DeltaH_(A) = b -d`D. `DeltaH_(B) = c-a` |
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Answer» Correct Answer - A::B::C |
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| 127. |
A graph showing variation of osmotic pressure `(pi)` versus molar concentration. C of an aqueous solution at temperature T is given below. The slope of the line is equal to: A. solution constant RB. absolute temperature TC. RTD. degree of ionization of solute |
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Answer» Correct Answer - C |
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| 128. |
`HNO_(3)` is more volatile than water. If an aqueous solution of `HNO_(3)` is taken then which of the following graph correctly represents variation of vapour pressure/boiling point with composition?A. B. C. D. |
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Answer» Correct Answer - A |
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| 129. |
Which of the following graphs is incorrect regarding rate constant (k) and absolute temperature ? [Symbols have usual meaning]A. B. C. D. |
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Answer» Correct Answer - C |
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| 130. |
From the following graph of log `x//m` us log P, calculate mass of `H_(@)` gas adsorped on the surface of 1gm palladium at pressure of `81 xx 10^(-4)atm`. [Express answer in gm) `(x)(M) =` Mass of gas absorbed per unit mass of absorbent. P = Partial pressure of gas in atm. |
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Answer» Correct Answer - 3 |
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| 131. |
Consider the following statements. (a) An oleum sample can be labelled as `127%` (b) Mole fraction is temperature dependent (c) Slope of log V us log T graph is constant. (At constant P and n for ideal gas). (d) 1 gm of `C_(6)H_(12)O_(6)` contains more number of atoms than 1 gm of `CH_(3)COOH`. (e) Intercept of log P vs log `(1//T)` is always positive. (At constant V and n for ideal gas) Select the correct code regarding true and false statement.A. FFTFFB. TFTFFC. TFTTFD. FFTFT |
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Answer» Correct Answer - A |
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| 132. |
The speed of a molecule of a gas changes continuously as a result of collisions with other molecules and with the walls of the container. The speeds of individual molecules therefore change with time. A direct consequence of the distribution of speeds is that the average kinetric energy is constant for a given temperature. The average K.E. is defined as `bar(KE) =1/N((1)/(2)m underset(i)SigmadN_(i)u_(1)^(2)) = 1/2 m(underset(i)Sigma(dN_(i))/(N).u_(1)^(2))` where `(dN)/(N)` is the fraction of molecules having speeds between `u_(i)` and `u_(i) + du` and as proposed by maxwell `(dN)/(N) = 4pi ((m)/(2pi KT))^(3//2) exp (-("mu"^(2))/(2KT)).u^(2).du` The plot of `((1)/(N) (dN)/(du))` is plotted for a particular gas at two different temperature against u as shown. The majority of molecules have speeds which cluster around `"v"_("MPS")` in the middle of the range of v. There area under the curve between any two speeds `V_(1) "and" V_(2)` is the fraction of molecules having speeds between`V_(1) "and" V_(2).` The speed distribution also depends on the mass of the molecules. As the area under the curve is the same (equal to unity) for all gas samples, samples which have the same `"V"_("MPS")` will have identical Maxwellian plots. On the basis of the above passage answer the questions that follow. If two gases A and B and at temperature `T_(A) "and"T_(B)` respectivley have identical Maxwellian plots then which of the following statement are true?A. `T_(B) =T_(A)`B. `M_(B) =M_(A)`C. `T_(A)/(M_(A)) = (T_(B))/(M_(B))`D. `"Gases A and B may be" O_(2) "and"SO_(2) at 27^(@)C "and" 327^(@)C "respectively"` |
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Answer» Correct Answer - C::D |
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| 133. |
For an ideal gas kept in a container attached manometer as show. Find volume of container. For the given gas, lo P us log `(1//V)` graph is given : A. `3L`B. `1.5L`C. `4.5 L`D. `2L` |
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Answer» Correct Answer - D |
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| 134. |
Which of the following graph is parabolic for fixed mass of an ideal gas at constant temperature in closed container ?A. `(1)/(V^(2))` us PB. `(P)/(V)` us PC. `(P)/(V)` us VD. `(P)/(V)` us log V |
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Answer» Correct Answer - A::B |
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| 135. |
Calculate `DeltaG` (in L atm) from the graph of an ideal gas undergoing process AB. [Take: ln 2 = 0.7] |
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Answer» Correct Answer - 14 |
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| 136. |
For a closed container containing 10 moles of an ideal gas, at constant pressure of `0.82` atm, which graph correctly represent, variation of log V us log T where volume is in litre and temp. in kelvin :A. B. C. D. |
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Answer» Correct Answer - A |
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| 137. |
Find the heat absorbed by an ideal gas (in kJ)w it follows the graph (given below) during isothermal expansion [ln 2 = 0.7] [Tale: 1 litre-bar = 0.1 kJ] |
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Answer» Correct Answer - 7 |
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| 138. |
One moles of an ideal monoatomic gas undergo the state change as shown in following graph (ln 2 = 0.7) Correct graph for the process in paragraph is:A. B. C. D. |
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Answer» Correct Answer - D |
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| 139. |
For the reaction `A(s) rarr A(g)`, the variation of log `K_(P)^(@)` us `(1)/(T)` is given by: If `S_(m)^(@), A(g)` is `31.78 cal//K` mole, then calculate `S_(m)^(@) A(s)` in cal/K mole. |
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Answer» Correct Answer - 9 |
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| 140. |
One moles of an ideal monoatomic gas undergo the state change as shown in following graph (ln 2 = 0.7) Efficiency of the cycle will be :A. `50%`B. `25%`C. `13.63%`D. `12%` |
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Answer» Correct Answer - D |
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| 141. |
1 mole `N_(2)(g)` undergoes followingcyclic process : Which option(s) is/are correct ? [Use: `R = 2 Cal//K-"mole"`, ln `2 = 0.7`] A. `W_("overall") = -180 cal`B. `DeltaH_(AB) = 300 cal`C. `DeltaU_(CA) = 1500 cal`D. `q_(BC)=- 600 cal` |
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Answer» Correct Answer - A::C |
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| 142. |
One mole of an ideal monoatomic gas undergoes a cyclic process as shown in figure. Then the change in the energy in expanding the gas from a to c along the path abc is: A. `3P_(0) V_(0)`B. `6RT_(0)`C. `4.5 RT_(0)`D. `10.5 RT_(0)` |
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Answer» Correct Answer - D |
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| 143. |
One mole of an ideal monoatomic gas is heated according to path AB and AC. If temperature of state B and C are equal then calculate `(q_(AC))/(q_(AB)) xx 10`. |
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Answer» Correct Answer - 8 |
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| 144. |
One mole of an ideal monoatomic gas undergoes the following cyclic process. Calculate the magnitude of work (in cal) in a cycle. (Use: ln 2 = 0.7) |
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Answer» Correct Answer - 420 |
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| 145. |
One mole of a monoatomic ideal gas is taken through a cycle ABCDA as shown in the P-V diagram. A student wants to determine sign of measurable quantities `DeltaU, q, W` and `DeltaS` for reach process separately. If x is the total number of negative values of measurable quantities in overall cycle, then calculate x. |
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Answer» Correct Answer - 9 |
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| 146. |
For the chemical equilibrium, `CaCO_(3)(s) hArr CaO(s)+CO_(2)(g)` `Delta_(r)H^(ɵ)` can be determined from which one of the following plots?A. B. C. D. |
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Answer» Correct Answer - A |
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| 147. |
During decomposition of `NH_(2)COONH_(2)(s)` reaction: `NH_(2) COONH_(4)(s) rarr 2NH_(3)(s)+CO_(2)(g)`. Which graph correctly represents average molecular weight of gaseous with progress of reaction :A. B. C. D. |
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Answer» Correct Answer - D |
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| 148. |
Which is/are correct statement ? (P) When 100 mL of `0.1M NaCN` solution is titrated with `0.1 M HCI` solution the variation of pH of solution with volume added will be (as shown in fig.) (Q) Variation of degree of dissociation `alpha` with concentration for a weak electrolyte at a particular temperature is best represented by (as shown in fig.) (R) `0.1M` acetic acid solution is titrated aganist `0.1M NaOH` solution. the difference in pH between `1//4` and `3//4` stages of neutralization of acid will be 2 log 3. A. P and RB. Q and RC. P,Q and RD. Q only |
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Answer» Correct Answer - C |
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| 149. |
Concentrations measured as a function of time when gaseous `N_(2)O_(5)` at initial concentration of `0.0200 M` decomposes ot gaseous `NO_(2)"and"O_(2) "at" 50^(@)C.`The change in concentration with time is given by the following graph. The rate of decomposition of `N_(2)O_(5)`during the period 300-400 s is :A. `4xx10^(-4) M//s`B. `3xx10^(-5)M//s`C. `2xx10^(-5)M//s`D. `4xx10^(-8)M//s` |
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Answer» Correct Answer - C |
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| 150. |
Given plot is valied, for which of the following reaction ? A. `2NH_(3)(g) hArr N_(2)(g) +3H_(2)(g)`B. `NH_(4)HS(s) hArr NH_(3)(g) +H_(2)S(g)`C. `CaCO_(3)(s) hArr CaO(s) +CO_(2)(g)`D. `CuSO_(4).5H_(2)O(s) hArr CuSO_(4).3H_(2)O(s) +2H_(2)O(g)` |
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Answer» Correct Answer - A::B::D |
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