Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Steam distillation is based on the fact that vaporisation of organic liquid takes place at

Answer»

a lower temperature than its boiling point
a higher temperature that its boiling point
its boiling point
water and organic liquid both undergo distillations

SOLUTION :`CH_(3)C-=C-CH_(3) overset((i)X)underset((ii)H_(2)O //Zn)RARR CH_(3)-underset(O)underset("||")(C )-underset(O)underset("||")(C )-CH_(3)` X in the above reaction is
Discussion
2.

Steam distillation is a better method of purification for … compounds:

Answer»

Liquids
Steam volatile
Non-volatile
MISCIBLE with water

Answer :B
Discussion
3.

Statues and paintings coated with white lead turn black on long exposure to atmoshphere. The original colour can be restored by treating them with H_(2)O_(2) The reason behind this is

Answer»

blackened statues get coated with PbS which on reaction with `H_(2)O_(2)`is oxidised to white `PbSO_(4)`
`H_(2)O_(2)`DISSOLVES the coating of white lead and exposes the inner surface.
white lead reacts with `H_(2)O_(2)`to form white `PbSO_(4)`
blackened statues get coated with lead sulphate which reacts with `H_2O_(2)` to give PbS.

Solution :The statues and paintings coated with white lead get blackened DUE to ACTION of `H_(2)O` present in traces in atmosphere. When these are treated with `H_(2)O_(2)`, PbS is oxidised to `PbSO_(4)` which is colourless or white.
`underset("Black")(PbS)+4H_(2)O_(2)RARR underset("White")(PbSO_(4))+4H_(2)O`
Discussion
4.

Starting from phenol how would you obtain the following compounds ? (a) p-quinone, (b) picric acid and (c) Anisole.

Answer»

Solution :(a) Phenol undergoes oxidation with air or acidified `K_(2)Cr_(2)O_(7)` with conc. `H_(2)SO_(4)` to form 1,4-benzoquinone.

(b) When phenol reacts with nitrating MIXTURE conc. `H_(2)SO_(4)` and conc. `HNO_(3)`, the product FORMED is PRICE acid.

( c) When phenol reacts with dioz methane in alkaline medium, anisole is formed.
Discussion
5.

Statistical thermodynamics is a branch of thermodynamics that deals with the study of_______ of the system.

Answer»

MICROSCOPIC properties
macroscopic properties
physical properties
both (A) and (B)

ANSWER :A
Discussion
6.

Stating with bromobenzene and any other needed reagents , outlinea synthesis of the following aldehyde. Strategy : Working backward , synthesize the target aldehyde from the corresponding alcohol by oxidation with PCC. Make the alcohol by treating magnesium bromide with oxirane. Notice that adding oxirane to a -CH_(2)CH_(2)OH unit to an organic group. Make phenyl magnesium bromide by treating bromobenzene withmagnesium in an ether solvent.

Answer»

SOLUTION :
Discussion
7.

States uses of aluminium, copper, zinc and iron.

Answer»

Solution :Aluminium : Foils of aluminium are used as wrappers for food materials.
The fine dust of the metal is used in PAINTS and lacquers.
Aluminium, being highly reactive used in extraction of chromium and manganese from their oxides.
WIRES of aluminium are used as electricity conductors. Alloys containing aluminium, being light are very useful.
COPPER : Copper is used in making wires used in electrical industry and for water and steam pipes. It is also used in several alloys that are rather tougher than the metal itself, e.g., brass (with zinc), bronze (with tin) and coinage alloy (with nickel).
Zinc : Zinc is used for galvanising of iron. It is also used in large quantities in batteries.
It is constituent of many alloys, eg., brass, (Cu 60%, Zn 40%) and german silver (Cu 25-30 %, Zn 25-30 %, Ni 40-50 %). Zinc dust is used as a REDUCING agent in the manufacture of dye stuffs and paints, etc.
Iron : Cast iron is used for casting stoves, railway sleepers, gutter pipes, toys, etc.
It is used in the manufacture of wrought iron and STEEL.
Wrought iron is used in making anchors, wires, bolts, chains and agricultural implements.
Alloy steel is obtained when other metals are added to it.
Nickel steel is used for making cables, automobiles and aeroplane parts, pendulum, measuring tapes.
Chrome steel is used for cutting tools and crushing machines and stainless steel is used for cycles, automobiles, utensils, pens, etc.
Discussion
8.

Statements : Oxidation ofNa_2SO_3 is not cauysed by air but in presence ofNa_3 AsO-_3 both undego oxidation simultaneously . Explanations : NeitherNaSO_3 norNa_3AO_3 is oxidised by air.

Answer»

S is correct but E is wrong .
S is worong but E is correct
Both S andE are correct and E is correct explanation of (S) .
Both S and E are correct but E is not correct explanation of S.

Solution :It is CALLED induced oxidation.
Discussion
9.

Statements: (i) Unit of conductivity is ohm^(-1) cm^(-1). (ii) Conductivity of strong electrolytes decreasews on dilution. (iii) The amount of an ion discharged during electrolysis does not depend upon resistance.

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All are correct
All are incorrect
Only (i), (II) and (IV) are correct.
Only (ii), (iii) and (iv) are correct.

ANSWER :A
Discussion
10.

Statements-I . Ti(III) saltsare coloured whereas Ti(IV) salts are white. Statement-2. Ti(III) is less stable than Ti(IV).

Answer»

Statement-1 is True, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION of Statement -1
Statement-1 is True, Statement-2 is True, Statement-2 is NOT a CORRECTEXPLANATION of Statement-1
Statement-1 is True, Statement-2 is false
Statement-1 is False, Statement-2is True

Solution :Correctexplanation. Ti(III) salts have one unpaired electron in d-subshell `(3D^(1))` whereas Ti(IV) salts have no electron in the d-sbushell `(3d^(0))`.
Discussion
11.

Statements-1. The metals of 4dand 5d transition series have greater enthalpiesof atomisation than thecorresponding elementsof the 3d series. Statements-2. The metal-metal bond in 4d and 5d series are stronger than those in the 3d series.

Answer»

Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION of Statement -1
Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correctexplanation of Statement-1
Statement-1 is True, Statement-2 is FALSE
Statement-1 is False, Statement-2is True

Solution :Statement-2 is the correct explanation of Statement-1
Discussion
12.

Statements-1: Linkage isomerism arises in coordination compounds containing amibidentate ligand. Statement-2: Ambidentate ligand has two different donor atoms.

Answer»

Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1.
Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.
Statement-1 is True, Statement-2 is FALSE.
Statement-1 is False, Statement-2 is True.

Answer :A
Discussion
13.

Statement_I: Na_(2)O_(3) is used in Photography. Statement_II: Ag_(2)S_(2)O_(3) is soluble in excess of Hypo solution.

Answer»

If both Statement-I `&` Statement-II are TRUE `&` the Statement-II is a correct EXPLANATION of the Statement-I
If both Statement-I `&` Statement-II are True but Statement-II is not a correct explanation of the Statement-I
If statement-I is True but the Statement-II is False
If Statement-I is False but the but the Statement-II is True

Solution :N//A
Discussion
14.

Statement1: PCl_(5)hArrPCl_(3)(g)+Cl_(2)(g). Final pressure is more than the initial pressure. Statement2: Deltangt0, more no. of moles on product side.

Answer»

Statement 1 is true, stetement 2 is true,statement 2 is a correct EXPLANATION for statement 1
Statement 1 is true, statement 2 is true, statement 2 is not a correct explanation for statement 1
Statement 1 is true, statement 2 is false
Statement 1 is false, statement 2 is true

Solution :Moles increases so pressure INCREASE
`(T&Vto"Contanst").`
Discussion
15.

Statement : To stop bleeding from an injury, ferric chloride can be applied. Which comment about the statement is justified?

Answer»

If is not TRUE FERRIC chloride is a poison.
It is true, `Fe^(3+)` ions coagulate blood which is a negatively charged sol
It is not true, ferric chloride is ionic and gets into the blood stream.
It is true, coagulation takes place because of formation of negatively charged sol with `Cl^(-)`.

Solution :It is true, `Fe^(3+)` ions coagulate blood which is a negatively charged sol
Discussion
16.

Statement: The rate of reaction normally increases by a factor of 2 or 3 for evergy 10^(@) rise in temperature. Explanation: Increase in temperature increases the number of collisions.

Answer»

(a) `S` is correct but `E` is WRONG
(b) `S` is wrong but `E` is correct
(c ) Both `S` and `E` are correct and `E` is correct explanation of `S`
(d) Both `S` and `E` are correct but `E` is not correct explanation of `S`.

Solution :Both are correct but do not GIVE correct explanation.
Discussion
17.

Statement: The rate of a chemical reaction increases as the temperature is increased. Explanation: The collision frequency between the reactant molecules increases on increasing the temperature.

Answer»

(a) `S` is correct but `E` is wrong
(b) `S` is wrong but `E` is correct
(C ) Both `S` and `E` are correct and `E` is correct EXPLANATION of `S`
(d) Both `S` and `E` are correct but `E` is not correct explanation of `S`.

Solution :These are facts
Discussion
18.

Statement: Photosynthesis in plants involves reaction of CO_(2) and H_(2)O in presence of light and chlorophyll. Explanation: It is chlorophyll which absorbs light and possess this energy to reactant molecules.

Answer»

(a) `S` is correct but `E` is WRONG
(B) `S` is wrong but `E` is correct
(c ) Both `S` and `E` are correct and `E` is correct explanation of `S`
(d) Both `S` and `E` are correct but `E` is not correct explanation of `S`.

Solution :Chlorophyll ACTS as photosensitizer. Neigher `CO_(2)` nor `H_(2)O` absords light.
Discussion
19.

Statement: In rate laws, unlike in the expression for equilibrium constants, the exponents for concentration do not necessarity match stoichiometric coefficients. Explanation: It is the mechanism and not the balanced chemical equation for the overall change that governs the reaction rate.

Answer»

(a) `S` is CORRECT but `E` is wrong
(B) `S` is wrong but `E` is correct
(c ) Both `S` and `E` are correct and `E` is correct explanation of `S`
(d) Both `S` and `E` are correct but `E` is not correct explanation of `S`.

Solution :Reaction rate is experimental quantity and not NECESSARY depends on stoichiometric COEFFICIENTS.
Discussion
20.

Statement-I: Unlike the gtC=O group of aldehydes and ketones, the C=O of R-overset(O)overset(||)C-OH does not undergo nucleophilic addition reactions. Because Statement-II: Carboxylic acids exist as dimers due to intermolecular hydrogen bonding in aprotic medium.

Answer»

Statement-I is TRUE, Statement-II is True : Statement-II is a CORRECT EXPLANATION for Statement-I
Statement-I is True, Statement-II is True : Statement-II is `NOT` a correct explanation for Statement-I
Statement-I is True, Statement-II is FALSE.
Statement-I is False, Statement-II is True.

Answer :C
Discussion
21.

Statement-I: When mercuric iodide(s) is added to the aqueous solution of KI, the freezing point is raised. Because Statement-II: HgI_(2) reacts with KI forming complex ion [Hg]_(4)^(2-)

Answer»


ANSWER :A
Discussion
22.

Statement I : Water is a high boiling point liquid. Statement II : Hydrogen bonding in water is responsible for high boiling point of water .

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Both the statements individually true and Statement II is the correct explanation of Statement I.
Both the statements are individually true but Statement II is not correct explanation of Statement I.
Statement I is true but Statement II is false .
Statement I is false but Statement II is true .

Solution :In the case of water, hydrogen bonding , which is a special case of polar dipole forces exerts a very strong effect to KEEP the molecules in a liquid state unit a fairly HIGH temperature is REACHED . Water boils at +100 C , which is very abnormal . The major reason for this abnormal behavior is the strong attractions afforded by the hydrogen bonds . It TAKES a lot more kinetic energy in an INCREASED temperature to break the hydrogen bonds to free the water molecules as the gas.
Discussion
23.

Statement-I : There is a natural asymmetry between converting work to heat and converting heat to work. Statement-II : No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.

Answer»

Statement-I is TRUE, Statement-II is True, Statement-II is a CORRECT EXPLANATION for Statement-I
Statement-I is True, Statement-II is True, Statement-II is NOT a correct explanation for Statement-I
Statement-I is True, Statement-II is FALSE
Statement-I is False, Statement-II is True

Answer :A
Discussion
24.

Statement 1 : The order of extent of attractive forces between monomers is fibres > thermoplastic polymers > elastomers Statement II : Thermoplastic polymers become soft on heating Statement III : Thermosetting polymers become hard on heating Correct statement is/are

Answer»

All
Only II
Only I, III
Only I

Answer :A
Discussion
25.

Statement : The plot of atomic number ( y -axis ) versus number of neutrons ( x -axis ) for stable nuclei shows a curvature towards x-axis fron the line of45^@ slope as the atomic number is increased . Explanation : proton -proton electrostatic repulsions begin to overcome attracive forces involving protons and neutrons in heavier nuclides.

Answer»

If both Statement-I & Statement -II are True & the Statement -II is a CORRECT explanation of the Statement -I.
If both Statement -I & Statement -II are True but Statement-II is not a correct explanation of the Statement-I.
If Statement-I is True but the Statement -II is False.
If Statement-I is False but the Statement -II is True.

Solution :
Discussion
26.

Statement-I: The major products formed by heating with HI are Statement-II: Benzyl carbocation is more stable.

Answer»

If both statement-I & statement-II are TRUE & the statement-II is a CORRECT EXPLANATION of the statement-I
if both statement-I & statement-II are true but statement-II is not a correct explanation of the statement-I
If statement-I is true but the statement-II is FALSE.
If statement-I is false but the statement-II is true.

Answer :A
Discussion
27.

Statement-I: The major products formed by heating with excess HI are: Statement-II: ArSN reaction takes place if the ring is activated by EW (eg., (-NO_(2)) group), at o-,p- and m-position.

Answer»

<P>If both statement-I & statement-II are true & the statement-II is a CORRECT explanation of the statement-I
if both statement-I & statement-II are true but statement-II is not a correct explanation of the statement-I
If statement-I is true but the statement-II is false.
If statement-I is false but the statement-II is true.

Solution :ArSN reaction TAKES PLACE if the ring s activated by `EW(e.g.,-NO_(2))` group only at `o-` and `p-`position and not at m-position.
Discussion
28.

Statement I : The blue colour of copper sulphate crystal disappers when it is heated strongly. Statement II : Due to heated , water of crystallization of crystal is lost .

Answer»

Both the statements individually TRUE and Statement II is the correct explanation of Statement I.
Both the statements are individually true but Statement II is not correct explanation of Statement I.
Statement I is true but Statement II is false .
Statement I is false but Statement II is true .

Solution :Copper sulphate is normally FOUND in the FORM of blue crystals , copper (II) sulphate pentahydrate . When you HEAT copper sulphate pentahydrate it turns white as the water which is driven off by the heat . The white SOLID remaining is anhydrous copper sulphate . If you add water to the anhydrous copper sulphate an exothermic reaction occurs , you can feel the test-tube getting hot , as the blue copper sulphate pentahydrate is re-formed .
Discussion
29.

Statement-I: The boiling pint of diethyl ehter is greater than furan Statement-II: Furan is more compact and has less suface area.

Answer»

If both statement-I & statement-II are TRUE & the statement-II is a CORRECT EXPLANATION of the statement-I
if both statement-I & statement-II are true but statement-II is not a correct explanation of the statement-I
If statement-I is true but the statement-II is FALSE.
If statement-I is false but the statement-II is true.

Answer :A
Discussion
30.

Statement - I : Sulphateisesimated as BaSO_(4) not as MgSO_(4) Statement - I I : onic radius of Mg^(2+) is strallerthan of be^(2+) :

Answer»


SOLUTION :Sulphate isestimated as `BaSO_(4)` and as `MgSO_(4)` because `MgSO_(4)` issoluble in water and does and not form a precipitate .Theionic radius of `Mg^(2+)` issmaller thanthat of `Ba^(2+)` because on movingdown in a groupionic RADII increase
Discussion
31.

Statement I :The basicity of lanthanides decreases . Statement II : The regular decreasein ionicradiiis lanthanide contraction.

Answer»

bothassertionand reasonare truereasonis thecorrectexplanationof THEASSERTION .
bothassertinandreasonare truebutreasonis notcorrectexplanationof theassertion
Assertionis truebutreasonis FALSE
Bothassertionand reasonare false.

Answer :B
Discussion
32.

Statement-I: Statement-II: p-NO_(2)-C_(6)H_(4)O^(-) is a stronger nucleophilic than PhO^(-)

Answer»

If both statement-I & statement-II are TRUE & the statement-II is a correct EXPLANATION of the statement-I
if both statement-I & statement-II are true but statement-II is not a correct explanation of the statement-I
If statement-I is true but the statement-II is false.
If statement-I is false but the statement-II is true.

Answer :C
Discussion
33.

Statement-I: Statement-II Phenol cannot be chlorinated because the ring is susceptible to oxidation by Cl_(2).

Answer»

If both statement-I & statement-II are TRUE & the statement-II is a CORRECT EXPLANATION of the statement-I
if both statement-I & statement-II are true but statement-II is not a correct explanation of the statement-I
If statement-I is true but the statement-II is FALSE.
If statement-I is false but the statement-II is true.

Answer :A
Discussion
34.

Statement-I : Standard enthalpy of isomerisation of an anatiomer into the other is zero. Statement-II : The two enantiomers of any chiral compound have the same enthalpy of formation.

Answer»

If both Statement-I & Statement-II are TRUE & the Statement-II is a CORRECT EXPLANATION of the Statement-I
If both Statement-I & Statement-II are True but Statement-II is not a correct explanation of the Statement-I
If statement-I is True but the Statement-II is FALSE.
If Statement-I is False but the Satement-II is True

Answer :A
Discussion
35.

Statement-I : SF_(4) and SeF_(4) are used as fluorinating agent Statement-II : The conversion of -COOH to -CF_(3),C=O to CF_(2) and P = O to PF_(2) can be made by SF_(4) or SeF_(4)

Answer»

Statement-I and Statement-II are CORRECT and Statement-II is correct EXPLANATION of Statement-I
Statement-I and Statement-II are correct and Statement-II is not correct explanation of Statement-I
Statement-I is correct and Statement-II is not correct
Statement-I is not correct and Statement-II is correct

Answer :C
Discussion
36.

Statement-I:- Sm^(3+), Dy^(3+) have same colour (yellow) Statement-II:-Both ions are having same number of unpaired electrons

Answer»

STATEMENT I is true, Statement II is true, Statement II is a CORRECT EXPLANATION of Statement I.
Statement I is true, Statement II is true, Statement II is not the correct explanation of statement I
Statement I is true, Statement II is false.
Statement I is false, Statement II is true.

Answer :A
Discussion
37.

Statement-I: Relative lowering of vapour pressure is equal to mole fraction of the solvent. Because Statement-II: Relative lowering of vapour pressure is a colligative property.

Answer»


ANSWER :D
Discussion
38.

Statement-I: Reduction potential value (E^(@)) of o-benzoquine (I) is greater than p- benzoquinone Statement-II: Two adjacent (C=O) group in (I) destabilse (I) relative to (II).

Answer»

If both statement-I & statement-II are TRUE & the statement-II is a CORRECT EXPLANATION of the statement-I
if both statement-I & statement-II are true but statement-II is not a correct explanation of the statement-I
If statement-I is true but the statement-II is FALSE.
If statement-I is false but the statement-II is true.

Answer :A
Discussion
39.

Statement I : Oxygen gas is easily produced at a faster rate by heating mixture of potassium chlorate and manganese dioxide than heating potassium chlorate alone . Statement II : Manganese dioxide acts as a negative catalyst .

Answer»

Both the STATEMENTS INDIVIDUALLY true and Statement II is the correct explanation of Statement I.
Both the statements are individually true but Statement II is not correct explanation of Statement I.
Statement I is true but Statement II is FALSE .
Statement I is false but Statement II is true .

Solution :Heating a MIXTURE of potassium chlorate and manganese dioxide PRODUCES oxygen gas and manganese dioxide acts as a positive catalyst.
Discussion
40.

Statement -I petroleum is mixture of many different hydrocarbons of different densities. Statement -II: The grade of petroleium depends mainly on the relative proportion of the different hydrocarbons

Answer»

Both the statements are individually true and statement II is the CORRECT EXPLANATION of statement I
Both the statements are individually true but statement II is not correct explanation of statement I
Statement I is true but statement II is false
Statement I is false but statement II is true

SOLUTION :Both the statements are individually true but statement II is not the corret explanation of the statement I
Discussion
41.

Statement-I : Number of peroxide bonds in permono and perdisulphuric acid are 1 and 2 respectively Statement-II : Both are dibasic and permonosulphuric acid does not exist in free state but its salts are reducing agent where as perdisulphuric acid salts are oxidant

Answer»

Statement-I and Statement-II are CORRECT and Statement-II is correct EXPLANATION of Statement-I
Statement-I and Statement-II are correct and Statement-II is not correct explanation of Statement-I
Statement-I is correct and Statement-II is not correct
Statement-I is not correct and Statement-II is correct

Answer :D
Discussion
42.

Statement-I : Of two isomeric alkennes shown, II is more stable than I. Because Statement-II : The alkene (II) has sp^(2)-hybridlzed carbons.

Answer»


SOLUTION :N//A
Discussion
43.

Statement I :Limestone decomposes when it is heated in air . Statement II : Increase in the content of CO_(2) in the atmosphere in recent years is mainly due to the using of limestone in the manufacture of cement.

Answer»

Both the STATEMENTS are individually true and STATEMENT II is the CORRECT explanation of Statement I
Both the statements are individually true but Statement II is not correct explanation of Statement I
Statement I is true and Statement II is FALSE
Statement I is false but Statement II is true

Answer :C
Discussion
44.

Statement I: Metal ions are lewis acids Statement II: Metal ions ae electron pair acceptors

Answer»

Both the statements individually true and statement II is the correct explanation of statement I
Both the statements are idividually true but statement II is not correct expalnation of statement I
Statement I is true but statement II is true
Statement I is FALSE but statement II is true

Solution :Polyphenols are secondary metabolites of plants and are GENERALLY iinvolved in defense against utlraviolet radiation or aggression by pathogen . Polyhenols are naturally OCCURRING compounds FOUND largely in the fruits VEGETABLES cereal s nd beverage fruits like grapes apple pear cherries and beries contains up to 200-300 mg polyphenols per 100 grams fresh weight
Discussion
45.

Statement-I: Me_(3)C-overset(O)overset(||)(C)-OH+overset(18)(MeOH)overset(conc.H_(2)SO_(4))toMe_(3)C-overset(O)overset(||)(C)-overset(18)(OM)e (Major) Statement-II: During esterification removed water molecule contains H of alcohol and OH of carboxylic acid.

Answer»

If both statement-I& statement-II are TRUE but statement-II is a correct EXPLANATION of the statement I.
If both statement-I & statement-II are true but statement-II is not a correct explanation of the statement-I
If statement-I is true but the statement-II is false
If statement-I is false but the statement-II is false

Solution :`MeC-COOH` undergoes `A_(AC)` and where major product in ether not ester.
Discussion
46.

Statement-I: is optically inactive, it is taken in a glass container and plane polarized light (PPL) is passed through it after heating it for several minutes The PPL shows significant optical rotation. Statement-II: Like beta-keto acid, gem dicarboxylic acid eliminates CO_(2) on heating.

Answer»

If both STATEMENT-I& statement-II are TRUE but statement-II is a correct explanation of the statement I.
If both statement-I & statement-II are true but statement-II is not a correct explanation of the statement-I
If statement-I is true but the statement-II is false
If statement-I is false but the statement-II is false

Solution :Recemic product is obtained which shows no optical ROTATION.
Discussion
47.

Statement-I:- La^(3+),Lu^(3+) ions are colourless Statement-II:- They do not contain unpaired electrons

Answer»

Statement I is TRUE, Statement II is true, Statement II is a correct EXPLANATION of Statement I.
Statement I is true, Statement II is true, Statement II is not the correct explanation of statement I
Statement I is true, Statement II is FALSE.
Statement I is false, Statement II is true.

ANSWER :A
Discussion
48.

Statement I : In estimation of FeSO_(4) KMnO_(4) along with HCl can be used as oxidising agent. Statement II : In acidic medium KMnO_(4) is more powerful oxidant compared to neutral/basic medium.

Answer»

If both Statement-I and Statement-II are TRUE, and Statement-II is the CORRECT EXPLANATION of Statement–I.
If both Statement-I and Statement-II are true but Statement-II is not the correct explanation of Statement–I.
If Statement-I is true but Statement-II is FALSE.
If Statement-I is false but Statement-II is true.

Answer :D
Discussion
49.

Statement - I. In electrolysis, the quantity of electricity needed for depositing 1 mole of silver is different form that required for 1 mole of copper. Statement - II. The atomic weights of silver and copper are different.

Answer»

STATEMENT-1 is TRUE, statement-2 is true and statement2 is CORRECT explanation for statement-4
Statement-1 is true, statement-2 is true and statement - 2 is NOT the correct explanation for statement-4
Statement - 1 is true, statement - 2 is false
Statement - 1 is false, statement - 2 is true.

Answer :B
Discussion
50.

Statement I : In CuO equivalent weight of Cu is 63.5 & in Cu_(2)O equivalent weight of Cu is 31.8. Statement II :Equivalent weight of any metal is the gm quantity of metal which is combined with 8 gm of oxygen in the formation of metal oxide.

Answer»

If both Statement-I and Statement-II are TRUE, and Statement-II is the CORRECT EXPLANATION of Statement–I.
If both Statement-I and Statement-II are true but Statement-II is not the correct explanation of Statement–I.
If Statement-I is true but Statement-II is FALSE.
If Statement-I is false but Statement-II is true.

Answer :D
Discussion