Explore topic-wise InterviewSolutions in .

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.

89301.

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:

Answer»

SOLUTION constant R
ABSOLUTE TEMPERATURE T
RT
degree of IONIZATION of solute

Answer :C
Discussion
89302.

A: In the manufacturing of iron from hematite, silicon dioxide is added as flux. R: Limestone is also used as acidic flux in many case.

Answer»

If both Assertion & Reason are TRUE and the reason is the correct EXPLANATION of the assertion, then mark (1).
If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
If Assertion is true STATEMENT but Reason is FALSE, then mark
 If both Assertion and Reason are false statements, then mark (4)

Answer :D
Discussion
89303.

A graph showing the variation of volume with temperture at constant pressure would look like

Answer»




ANSWER :C
Discussion
89304.

(A) In the extraction of Mg from used anhydrous MgCl_(2) air gap of the electrolytic cell is to be replaced by inert gas. (R) Oxidation of Mg metal is to be prevented during its extraction by electrolytic reduction of anhydrous MgCl_(2)

Answer»

A and are true, R explains A
A and RARE true, Reinot explain A
A is true R is false
A is false R is true

Answer :A
Discussion
89305.

A graph plotted between log t_(50%) vs log concentration in a straight line. What conclusion can you draw from this graph?

Answer»

N= 1, `t_(1//2)= t/(x xx a)`
`n=2, t_(1//2) = 1/a`
`n=1, t_(1//2)= 0.693/k`
none of these

Solution :C) `t_(1//2) propto a^(1-n) = k(a)^(1-n)`
log `t_(1//2) = log k + (1-n) log a`
The graph is EXPECTED to be a straight line.
Therefore, SLOPE 1-n =0 or n=1
Discussion
89306.

A graph plotted between (P)/(d) vs d (where p is osmotic pressure of solution of a solute of mol. Wt. m and d is its density temperature T. Pick out the correct statements about the plots :

Answer»

`[(P)/(d)]_(drarr0)=(ST)/(m)`
The intercept of the PLOT `(ST)/(m)`
The intercept of the plot `=[(P)/(d)]_(drarr0)`
`[(P)/(d)]_(drarr0)` is INDEPENDENT of temperature

Solution :`P=MST`
`P=(n)/(V)xxST`
`P=(w)/(VxxM)xxST`
`(P)/(d)=(ST)/(M)`
Discussion
89307.

A graph plotted between log k versus 1//T for calculating activation energy is shown by

Answer»




ANSWER :B
Discussion
89308.

(A): In the construction of Galvanic cell, lithium electrode can not be used as cathode (R) : Lithium has the highest negative S.R.P value.

Answer»

Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is FALSE
(A) is false but (R) is true

Answer :A
Discussion
89309.

A graph plotted between concentration of reactant consumed at any time (x) and t is found to be straight line passing through the origin. Thus reaction is of

Answer»

SECOND order
Zero order
Third order
First order

Answer :B
Discussion
89310.

A graph ploted between concetration of reaction consumed at any time (x) and t_(1//2) is found to be a straight line passing throught the origin. Thus reaction is of

Answer»

first order
zero order
THIRD order
second order

Solution :For zero order `t_(1//2) prop a`
`THEREFORE` line PASSES through ORIGIN
Discussion
89311.

(A) In the case of an ore contaning ZnS and PbS, the one depresant like NaCN is used (R) NaCNprevents ZnS from coming to thefroth

Answer»

Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct explanationof (A)
(A) is true but (R) is false
Both (A) and (R) are false

ANSWER :A
Discussion
89312.

(A): In strong acidic solutions aniline becomes more reactive towards electrophilic reagents. (R): The amino group is completely protonated in strong acidic solution, the lone pair of electrons on the nitrogen is no longer available for resonance.

Answer»

Both A & R are true, R is the correct explanation of A
Both A & R are true, R is not correct explanation of A
A is true, R is FALSE
A is false, R is true

Answer :A
Discussion
89313.

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.

Answer»

AVERAGE RATE upto 40 seconds is `(V_(3)-V_(2))/(40)`
Avergae rate upto 40 seconds is `(V_(3)-V_(2))/(40 - 30)`
Average rate upto 40 seconds is `(V_(3))/(30)`
Average rate upto 40 seconds is `(V_(3) -V_(1))/(40 - 20)`

ANSWER :C
Discussion
89314.

a) In the complex compound represented by CoCl_(3).4NH_(3), how many ammonia molecules satisfy the secondary valence of cobalt if one mole of the compound upon treatment with excess AgNO_(3) produces one mole of AgCl_((s))

Answer»

Solution :4 Ammonia molecules satisfy the secondary valence of cobalt of one MOLE of the compound upon TREATMENT with EXCESS `AgNO_(3)` PRODUCES one mole of `AgCl_(3)`
Discussion
89315.

A graph, ploted between concentration of reactant consumed at any time (x) and time t is found to be a straight line passing through the origin. Thus reaction is of:

Answer»

FIRST order
Second order
Zero order
None

Answer :B
Discussion
89316.

A in the above sequence is

Answer»




SOLUTION :REDUCTION of nictrobenzene MECHANISM
Discussion
89317.

A graph of volume of hydrogen released vs time for the reaction between zinc and dil. HCl is given in the figure.On the basis of this mark the correct option-

Answer»

average rate UNTO 40 s is `(V_(3)-V_(2))/(40)`
average rate unto 40 s is `(V_(3)-V_(2))/(40-30)`
average rate unto 40 s is `(V_(3))/(40)`
average rate unto 40 s is `(V_(3)-V_(1))/(40-20)`

Answer :C
Discussion
89318.

(A) In SO_(2), the bond angle is 119^(0)whereas in SO _(3), the bond angle is 120^(0). (R ) S atom in both SO _(2) and SO _(3) is sp^(2)- hybridized.

Answer»

Both (A) and (R ) are TRUE and (R ) is the CORRECT explanation of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
(A) is true but (R ) is false
Both (A) and (R )are false

ANSWER :B
Discussion
89319.

A graph of adsorption isobar of chemisorption shows that adsorption

Answer»

FIRST DECREASES with TEMPERATURE and then INCREASES
First increases with temperature and then decreases
Increases with temperature
Decreases with temperature

Answer :B
Discussion
89320.

A graph is plotted b//w(p)/(d) vs d ("P" is Osmotic pressure of a solution having solute of M.wt "m" and d is density temperature T) Pick out the correct statements about the plots .

Answer»

<P>`[(P)/(d)]_(drarr0)=(ST)/(m)`
intercept of the plot is `(ST)/(m)`
inctercept of the Plot is `[(P)/(d)]_(drarr0)`
`[(P)/(d)]_(drarr0)` is independent of temperature

ANSWER :A::B::C
Discussion
89321.

(A)In smelting, roasted ore is heated with powdered cokein presence of a flux. (R) Oxides are reduced to metalsby carbon or carbonmonoxide. Impuritiesare removed as slag.

Answer»

Both (A) and (R) are true and (R) is the CORRECT EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct EXPLANATIONOF (A)
(A) is true but (R) is false
Both (A) and (R) are false

Answer :A
Discussion
89322.

A graph is plotted between uncertainty in position and inverse of uncertainty in wavelength for an electron. We get a straight line passing through origin. Calculate voltage through which electron is accelerated with:

Answer»

`150 V`
`75V`
`37.5V`
`300V`

ANSWER :C
Discussion
89323.

(A) In PF_(5), 'P' has two types of P - F bond lengths (R ) In PF_(5), 'P' undergoes sp^(3)d hybridisation with trigonal bipyramidal structure and possess unequalbond angles and bond lengths

Answer»

Both (A) and (R ) are true and (R ) is the correct EXPLANATION of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
(A) is true but (R ) is FALSE
Both (A) and (R ) are false

Answer :1
Discussion
89324.

A graph is drawn between the lambda_(eq) values and concentration of an electrolyte. Which of the followingelectrolyte will correspond to the graph given ?

Answer»

KCL
`BaCl_2`
`H_2SO_4`
`CH_3COOH`

ANSWER :D
Discussion
89325.

(A) In PCl_(5) axial P-Cl bonds are weaker than equitorial P-Cl bonds. (R ) In PCl_(5) axial P-Cl bonds experience greater repulsion from equitorial P-Cl bonds than the repulsion among equitorial P-Cl bonds.

Answer»

Both (A) and (R ) are TRUE and (R ) is the CORRECT EXPLANATION of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
(A) is true but (R ) is false
Both (A) and (R ) are false

ANSWER :1
Discussion
89326.

A graph drawn between 'log.(x)/(n)’ and log p on 'X' and 'Y' axis respectively could be - regarding physical adsorption

Answer»

Hyperbola
PARABOLA
STRAIGHT line with POSITIVE slope
Straight line with negative slope

Answer :C
Discussion
89327.

(A) In NH_(3) the bond angle is very close to tetrahedral angle (R ) In NH_(3) nitrogen atom is SP^(3) hybridized

Answer»

Both (A) and (R ) are true and (R ) is the CORRECT EXPLANATION of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
(A) is true but (R ) is FALSE
Both (A) and (R ) are false

ANSWER :1
Discussion
89328.

A graph between vapour pressure and temperature of few liquids is given below. Study the graph and answer following question. Which of the following statements is not true?

Answer»

Boiling point of a liquid is the temperature at which its vapour pressure becomes equal to atmospheric pressure.
Boiling point of water can be INCREASED by increased the pressure above the atmospheric pressure
If liquid B is HEATED in a closed vessel it will boil at 353 K
Liquid C has higher boilingk point than B due to higher INTERMOLECULAR forces.

Solution :Boiling does not occur when liquid is heated ina closed vessel.
Discussion
89329.

A : In molecular solids the lattice points are occupied by the atoms or molecules.R : Molecular solids are generally sublime.

Answer»

If both Assertion & Reason are true and the reason is the CORRECT explanation of the assertion then mark (1)
If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
If Assertion is true STATEMENT but Reason is false then mark (3)
If both Assertion and Reason are false statements, then mark (4)

Answer :B
Discussion
89330.

A graph between the amount of gas adsorbed per gram of the absorbent and equilibrium pressure of the adsorbate at constant temperature is called ................. .

Answer»

SOLUTION :ADSORPTION ISOTHERM
Discussion
89331.

(A) In MnO_(4)^(-) the M-O bonds are ionic . (R) The oxidation number of maganese in MnO_4^(-) is - 1 .

Answer»

Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is FALSE
Both (A) and (R) are false

Solution :Both (A) and (R) are false
Discussion
89332.

A graph between (P)/(d) vs d (where, P is osmotic pressure of solution of a solute of mol. Wt. m and d is (("wt. of solute")/("volume of solution")) at temperature T). Pick the correct statement about the plots :

Answer»

`[p/d]_(drarrtheta) = (ST)/(m)`
The INTERCEPT of the plot `= (ST)/(m)`
The intercept of the plot `= [p/d]_(drarrtheta)`
`[p/d]_(drarrtheta)` is INDEPENDENT of temperature

Answer :A::B::C
Discussion
89333.

A graph between log t_(1//2) and log a (abscissa), a being the initial concentration of A in the reaction A rarr product, is depicted in the figure. The rate law is

Answer»

`-(d[A])/(dt)=k`
`-(d[A])/(dt)=k[A]`
`-(d[A])/(dt)=k[A]^(2)`
`-(d[A])/(dt)=k[A]^(3)`

Solution : `t_(1//2)=ka^(1-n)`, n being ORDER, k=rate CONSTANT LOG `t_(1//2)`=log k+(1-n)log a
Slope, (1-n) = -2, n = 3
Discussion
89334.

a' grams of element A combine with 'b' grams of element B. 'b' element C. if elementsA and C combine , the probable ratio in which their weights combine together could be

Answer»

2A:b
a:C
2B:a
2b:c

Answer :B
Discussion
89335.

(A) In methanol C-O bond length is 1.42Å, but in phenol, it is 1.36Å.(R) In methanol carbon atom is sp^3hybridised and in phenol, carbon atom bearing the hydroxyl group is sp^2 hybridised.

Answer»

Both (A) and (R) are TRUE and (R) is the correct EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is FALSE
Both (A) and (R) are false

Answer :A
Discussion
89336.

(A) In metallurgy of Al , the electrolyte is bauxite mixed with cryolite (R)Addition of Na_(3) AlF_(6) or CaF_(2)lower M.P and increasesconductivity

Answer»

Both (A) and (R) are TRUE and (R) is the correct explanation of (A)
Both (A) and (R) are true and (R) is not the correct EXPLANATIONOF (A)
(A) is true but (R) is FALSE
Both (A) and (R) are false

ANSWER :A
Discussion
89337.

A good vacuum produced in common laboratory apparatus corresponds to 10^(-6) mm pressure at 25^(@)C. Calculate number of molecules per cc at this pressure and temperature.

Answer»

SOLUTION :`3.2 XX 10^(10)`
Discussion
89338.

(A)In metallurgy of Ag, Zn replaces Ag from comples Na[Ag(CN)_(2)] (R) Zn is more electropositive than Ag.

Answer»

Both (A) and (R) are true and (R) is the CORRECT EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct explanationof (A)
(A) is true but (R) is FALSE
Both (A) and (R) are false

ANSWER :A
Discussion
89339.

(A) : In many crystal structures of ionic substances cations occupy the voids created byanions. (R) : Cations are smaller than anions.

Answer»

Both (A) and (R) are TRUE and (R) is the CORRECT explanation of (A)
Both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is false
Both (A) and (R) are false

Answer :A
Discussion
89340.

A good test to distinguish between oxalic , malonic and succinic acids would be :

Answer»

To HEAT them and EXAMINE their product
Their REACTION with `CaCl_2`
Their reaction with ACIDIFIED `KMnO_4 `
Their reaction with `NH_3`

ANSWER :A
Discussion
89341.

(A) In HX , stability decreases down the group (R ) Bond dissociation enthalpy oeder of HX is H-FgtH-ClgtH-BrgtH-I

Answer»

Both (A) and (R ) are TRUE and (R ) is the correct explanation of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
(A) is true but (R ) is FALSE
Both (A) and (R ) are false

ANSWER :A
Discussion
89342.

A good sampleof CaOCl_(2) reacts with atmospheric CO_(2)and releases -------- % of Cl_(2) theoretically

Answer»

0.56
0.5
35-38% `Cl_(2)`
0.4

Answer :A
Discussion
89343.

A good quality of bleaching powder should contain available Cl_(2)

Answer»

25-28%
35-38%
30-33%
20-23%

ANSWER :B
Discussion
89344.

(A) In Froth floatation proess collectors like pine oil is added (R) Froth Floatation is in use for removing ganguefrom sulphide ores

Answer»

Both (A) and (R) are TRUE and (R) is the correct EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct explanationof (A)
(A) is true but (R) is FALSE
Both (A) and (R) are false

Answer :B
Discussion
89345.

(A)In extraction of Al, Al_(2) O_(3) is concentrated by leaching (R) Leaching removes impurities like SiO_(2), Fe_(2) O_(3)

Answer»

Both (A) and (R) are TRUE and (R) is the CORRECT explanation of (A)
Both (A) and (R) are true and (R) is not the correct EXPLANATIONOF (A)
(A) is true but (R) is FALSE
Both (A) and (R) are false

ANSWER :A
Discussion
89346.

A good example of an unsaturated acid got by the hydrolysis of an oil is:

Answer»

PALMITIC acid
Stearic acid
Oleic acid
Lauric acid

Answer :C
Discussion
89347.

(a) In extraction of Aluminium by electrolysis, (i) Write ovreall cell reaction. (ii) What is the role of cryolite? (b) Name the metal refined by Mond's process.

Answer»

Solution : (a) (i) `2Al_2O_3 +3C to 4Al + 3CO_2`
(ii) Lowers the melting point of the mixture and INCREASES the electrical conductivity.
(B) Nickel .
Discussion
89348.

A Gold is found wally neat ... Mineral

Answer»

Mica
Feldspar
QUARTZ
Glena

Solution :GOLD is FOUND usually NEAR quartz mineral.
Discussion
89349.

A G.M. counter is used to study the radioactive process of first-order. In absence of radioactive substance A, it counts 3 disintegration per second (dps). When A is placed in the G.M. conter,it records 23 dps at the start and 13 dps after next 10 minutes and A has half-life periody minutes. x and y are:

Answer»

8 DPS, 10min
5dps, 10min
5dps, 20min
5dps, 5min

Answer :A
Discussion
89350.

(A) In ethers, bond angle C-O-C is more than tetrahedral angle(R) Steric repulsive inter action between two bulky alkyl groups is more than 1p-lp repulsions around oxygen atom

Answer»

Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is false
Both (A) and (R) are false

Answer :A
Discussion