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.

Assertion: The rate of a reaction is normally accelerated by the presence of a catalyst. Reason: The presence of a catalyst makes the value of DeltaG^(@) more negative.

Answer»

If both assertion and reason are correct EXPLANATION for assertion.
If both assertion and reason are correct but reason is not correct explanation for assertion.
If assertion is correct but reason is incorrect.
If both assertion and reason are incorrect.

Solution :C) Correct reason: The presence of a catalyst lowers the height of energy BARRIER for the reaction. As a result, the number of EFFECTIVE collisons increases.
Discussion
2.

Assertion : The rate of reaction is always negative . Reason : Minus sign used in expressing the rate shows that concentration of product is decreasing .

Answer»

If both assertion and reason are true and the reason is the correct explanation of the assertion
If both assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is FALSE
If assertion and reason both are false .

Solution :The rate REACTION is never negative . MINUS SIGN usedin expressing the rate only shows that the concentration of the reactant is decreasing .
Discussion
3.

Assertion : The radius of the first orbit of hydrogen atom is0.529Å Reason : NF_(3)ionizesto giveF^(-1) ions in aqueoussolution.

Answer»

Assertionis correct, reason is correct, reason is a correct explanation for ASSERTION.
Assertionis correct, reason is correct, reasonis not a correct explanation for assertion
Assertionis correct, reasonis incorrect
Assertion is incorrect, reasonis correct.

SOLUTION :It is correct statement that `NF_(3)` isaweaker ligand than `N(CH_(3))_(3)`, the reason is that fluorine is HIGHLY electro negative therefore, it with draw electrons from nitroge natom. Hence,thelone pair of nitrogen ATOM cannot beligated.While `N(CH_(3))_(3)` is a strong ligand because `CH_(3)` is electron releasing GROUP.
Discussion
4.

Assertion . The purple colour of KMnO_(4) is due to the charge transfer transition. Reason. The intensecolour of most of the transition metal complexesis due to d-d transition,.

Answer»

Solution :Correct explanation.The INTENSE colourof `KMnO_(4)` is not DUE to d-d transition but due to charge transferfrom O to M ( Ligand to METAL) REDUCING the oxidation state of Mn from `+7`to `+6 ` temporarily.
Discussion
5.

Assertion :The purple colour of KMnO_4 is due to the charge transfer transition. Reason : The intense colour in most of the transition metal complexes is due to dd transition.

Answer»

Both Assertion and REASON are TRUE and Reason is the CORRECT explanation of Assertion
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
Assertion is true but Reason is FALSE
Both Assertion and Reason are false

Answer :B
Discussion
6.

Assertion : The presence ofnitro group facilitates nucleophilic substiution reactions in aryl halides. Reason : The intermediate carbanion is stabilised due to the presence of nitro group.

Answer»

if both Assertion and Reason are TRUE andreason is the correct EXPLANATION of the assertion.
if bothassertion and reason are true but reason isnot the correct expalanation of the assertion
if assertion is true, reason is false
both assertion and reason are false statements.

Solution :The C- atom of C- Cl in chloronitrohenzene carries a small + ve CHARGE.

Because of the positive charge, attack this carbon atom by the nucleophile is fecilitated.
Discussion
7.

Assertion: The pressure exerted by the vapour of a liquid at equilibrium at a given temperature is called its vapour pressure. Reason:If a nonvolatile solute is added to a solvent to give a solution, the vapour pressure of the solution is found to be greater than the vapour pressure of the pure solvent.

Answer»

Both ASSERTION and REASON are true and Reason is the correct explanation of Assertion
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
Assertion is true but Reason is false
Both Assertion and Reason are false

ANSWER :C
Discussion
8.

Assertion: The presence of nitro group facilitates nucleophilic substitution reaction in aryl halides. Reason: The intermediate carbanion is stabilized due to the presence of the nitro group.

Answer»

If both ASSERTIONN and REASON are TRUE, and reason is the true EXPLANATION of the ASSERTION.
If both assertion and reason are true, but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and Reason are false.

Answer :A
Discussion
9.

Assertion: The presence of a large number of Schottky defects in NaCl lowers its density. Reason: In NaCl, there are approximately 10^(6) Schottky pairs per cm^(3) at room temperature.

Answer»

If both assertion and reason are true and the reason is the CORRECT explanantion of the assertion
If both assertion and reason are true but reason is not the correct EXPLANATION of the assertion.
If assertion is true but reason is false.
If the assertion and reason both are false.

Solution :When an ATOM or an ION is missing from its normal lattice site. Defect, due to missing density of crystal will be lowered.
Discussion
10.

Assertion : The pK_(a) of acetic acid is lower than that of phenol. Reason : Phenoxide ion is more resonance stabilized.

Answer»

If both ASSERTION and REASON are TRUE and reason is the CORRECT EXPLANATION of the assertion
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If the assertion and reason both are false.

Answer :A
Discussion
11.

Assertion: The pK_(a) of acetic acid is lower than that of phenol. Reason: Phenoxide ion is more resonance stabilized than acetate ion.

Answer»

if both ASSERTION and reson are true, and reason is the true explanation of the assertion.
If both assertion and reason are true, but reason is not the true explanation of the assertion.
if assertion is true, but reason is false.
If both assertion and reason are false.

Solution :CORRECT reason. ACETATE ION is more resonance stabilized than phenoxide ion.
Discussion
12.

Assertion : The physical properties of natural rubber can be improved by vulcanisation . Reason : Neoprene is the monomer of natural rubber .

Answer»

If both assertion and reason are trueand reason is the correct EXPLANATIONOF assertion .
If both assertion and reason are true but reason is not the correct explanationof assertion .
If assertion is true but reason is false.
If both assertion and reason are false.

SOLUTION :ISOPRENE ( 2-methyl-1,3-butadiene ) is the MONOMER of NATURAL rubber .
Discussion
13.

Assertion: The packing efficiency is maximum for the fcc structure. Reason: The co-ordination number is 12 in fcc structures.

Answer»

Assertion and REASON both are correct STATEMENT and reason is correct EXPLANATION for assertion. 
Assertion and reason both are correct statements but reason is not correct explanation for assertion. 
Assertion is correct statement but reason is wrong statement. 
Assertion is wrong statement but reason is correct statement. 

Solution :FCC is close packed structure.
Discussion
14.

Assertion (A) : The packing efficiency is maximum for the fcc structure. Reason ( R ) : The co-ordination number is 12 in fcc structure.

Answer»

Both ASSERTION and REASON are true and reason is the CORRECT EXPLANATION of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false
Both assertion and reason are false.

Answer :b
Discussion
15.

Assertion. The order of a reaction can have fractional value. Reason. The order of reaction cannot be written from the balanced equation of the reactant.

Answer»

If both assertion and reason are true and reason is the true explanation of the assertion.
If both assertion and reason ae true but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and reason are false.

Solution :Correct explanation. The ORDER of reaction depends UPON the POWER to which the concentration is raised to EXPRESS the rate of reaction as found experimentally.
Discussion
16.

Assertion. The oxidation number of platinum in Zeise's salt is + 4. Reason. Zeise's salt is non-ionic complex.

Answer»

If both assertion and reason are true, but reason is not the true explanation of the assertion
If both assertion and reason are true, but reason is not the true explanation of the assertion
If assertionis true, but reason is false
If both assertion and reason are false

Solution :Correct A. The OXIDATION number of PT in Zeise's salt is + 2.
Correct R. Zeise's salt is ionic complex with the formula, `K[PtCl_(3)(C_(2)H_(4))]`.
Discussion
17.

Assertion : The order of reaction can have fractional value. Reason : Order cannot be determined from a stiochiometrically balance equation.

Answer»

Both ASSERTION and reason are TRUE and reason is the CORRECT EXPLANATION of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false.
Both assertion and reason are false.

Answer :B
Discussion
18.

Assertion : The order of a reaction can have fractional value . Reason : The order of a reaction cannot be written from balanced equation of a reaction

Answer»

If both assertion and REASON are true and the reason is the correct explanation of the assertion .
If both assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is false
If the assertion and reason both are false .

Solution :It is an experimentally determined value and depends UPON the concentration change of REACTANT . It changes with PRESSURE , temperature and concentration and it can have the fractional value .
Discussion
19.

Assertion: The number of unpaired electrons present in [CuCl_2]^(-)complex is zero Reason: The complex is linear in the solid state with sp- hybridization

Answer»

Both ASSERTION & Reason are true ,Reason is the CORRECT explanation of Assertion
Both Assertion & Reason are true, Reason is not correct explanation of Assertion
Assertion is true , Reason is false
Assertion is false , Reason is false

Answer :B
Discussion
20.

Assertion. The O-O bond length in H_(2)O_(2) is shorter than that of O_(2)F_(2). Reason. H_(2)O_(2) is an ionic compound.

Answer»

If both assertion and REASON are true, and reason is the correct explanation of the assertion.
If both assertion and reason are ture, but reason is not the correct explanantion of the assertion.
If assertion is true, but reason is false.
If both assertion and reason are false

Solution :Correct assertion. The O-O BOND length in `H_(2)O_(2)` is longer than that in `O_(2)F_(2)`
Correct reason. The lone pairs of ELECTRONS on the O atoms are strongly attracted by the more electronegative F atoms. As a result, lone-PAIR-lone pair repulsion of the two O atoms in `O_(2)F_(2)` is far less than in `H_(2)O_(2)`. As a result, O-O bond length in `O_(2)F_(2) (1.22 Å)` is much SHORTER than in `H_(2)O_(2) (1.48 Å)`.
Discussion
21.

Assertion: The number of unpaired electrons in Ni(CO)_4 complex is zero. Reason :4s electrons of Ni atom enter the inner d-orbitals to facilitate the sp^3 hybridization in Ni atom.

Answer»

Both Assertion & REASON are true ,Reason is the correct EXPLANATION of Assertion
Both Assertion & Reason are true, Reason is not correct explanation of Assertion
Assertion is true , Reason is FALSE
Assertion is false , Reason is false

ANSWER :A
Discussion
22.

Assertion : The number of spheres are eual to the number of octahedral voids as well as tetrahedral voids. Reason : octahedral void and tetrahedral void has equal size.

Answer»

Both assertion and REASON are true and reason is the CORRECT EXPLANATION of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false
Both assertion and reason are false.

Answer :d
Discussion
23.

Assertion. The number 14.56pm0.01 has three significant figures. Reason. Number of significant figures is total number of digits except the last digit whose value is uncertain.

Answer»

If both assertion and reason are true, and reason is the true EXPLANATION of the assertion.
If both assertion and reason are true, but reason is not the true explanation of the assetion.
If assertion is true, but reason if false
If both assertion and reason are false.

Solution :Correct A. The number `14.56pm0.01` has four SIGNIFICANT FIGURES.
Correct R. Number of significant figures is total number of DIGITS including the last digit whose value is uncertain.
Discussion
24.

Assertion. The [Ni(en)_(3)]Cl_(2) (en = ethylenediamine) has lower stability than [Ni(NH_(3))_(6)]Cl_(2). Reason. In [Ni(en)_(3)]Cl_(2), the geometry of Ni is trigonal bipyramidal.

Answer»

If both assertion and REASON are true, but reason is not the true explanation of the assertion
If both assertion and reason are true, but reason is not the true explanation of the assertion
If assertionis true, but reason is false
If both assertion and reason are false

Solution :Correct A. `[NI(en)_(3)]Cl_(2)` has greater stability than `[Ni(NH_(3))_(6)]Cl_(2)`.
Correct R. `[Ni(en)_(3)]Cl_(2)` has bidentate LIGAND, en, forming CHELATES.
Discussion
25.

Assertion : The neutrons are better initiators of nuclear reactions, than the protons, deutrons or alpha particles of the same energy. Reason :Neutrons are uncharged particles and hence, they are not repelled by positively charged nucleus.

Answer»

If both ASSERTION and REASON are TRUE and the reason is the correct explanation of the assertion
If both assertion and reason are true but reason is not the correct EXPLANANTION of the assertion
If assertion is true but reason is false
If the assertion and reason both are false

Answer :A
Discussion
26.

Assertion : The nearly tetrahedral arrangement of the orbitals about the oxygen atoms allows each water molecule to form hydrogen bonds with as many as four neighbouring water molecules. Reason : In ice each water moleculesforms four hydrogen bonds as each molecules is fixed in the space.

Answer»

If both the assertion and reason are TRUE statement andreason is correct explanation of the assertion .
If both the assertion and reason are true statement but reason is not a correct explanation of the assertion .
If the assertion is true but the reason is a false statement.
If both assertion and reason are false statements.

Solution :The strength of the force (F) of the ionic interaction depends , upon the MAGNITUDE of charge (Q), the distance between them and the dielectric constant of solvent as ` F=(Q_(1)Q_(2))/(epsir^(2))`
Waterhas highly value for ` EPSI`and thus screens the interactions between ions more effectively .
Discussion
27.

Assertion : The name of the complex [Co(NH_(3))_(6)]Cl_(3) is hexamminecobalt (III) chloride. Reason. When a prefix like hexa ends in 'a' and the ligand like 'ammonia' starts with 'a', only one 'a' is retained.

Answer»

If both assertion and reason are TRUE, but reason is not the true explanation of the assertion
If both assertion and reason are true, but reason is not the true explanation of the assertion
If assertionis true, but reason is false
If both assertion and reason are false

Solution :Correct A. The name of the complex `[Co(NH_(3))_(6)]Cl_(3)` is hexaammine cobalt (III) chloride.
Correct R. When prefix ends in 'a' and LIGAND starts with 'a', both 'a' are retained.
Discussion
28.

Assertion : The monomer of neoprene is 1, 3- butadiene . Reason : Neopren is highly inflammable .

Answer»

If both ASSERTION and REASON are trueand reason is the correct explanationof assertion .
If both assertion and reason are true but reason is not the correct explanationof assertion .
If assertion is true but reason is FALSE.
If both assertion and reason are false.

Solution :The monomer of NEOPRENE is chloroprne (2-chloro -1,3-butadiene ) .
Discussion
29.

Assertion. The molecularity of the reaction H_(2)+Br_(2) to 2" HBr is "2. Reason. The order of the reaction is 3//2.

Answer»

If both ASSERTION and REASON are true and reason is the true EXPLANATION of the assertion.
If both assertion and reason ae true but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and reason are false.

Solution :CORRECT explanation. Molecularity is two because two molecules of the REACTANTS are involved in the given elementary reaction.
Discussion
30.

Assertion: The molecularity of the reaction H_(2) + Br_(2) rarr 2HBr is 2. Reason: The order of the reaction is 3//2.

Answer»

If both assertion and reason are true and the reason is the correct EXPLANATION of the assertion.
If both assertion and reason are true but the reason is not the correct explanation of the assertion.
If assertion is true but reason is FALSE.
If assertion is false but reason is true.

Solution :Correct explanation. MOLECULARITY is TWO bacause two molecuels of the reactants are involved in the given elementary reaaction.
Discussion
31.

Assertion. The molecular weight of acetic acid determined by depression in freezing point method in benzene and water is found to be different. Reason. Water is polar and benzene is non-polar.

Answer»

If both assertion and reason are true, and reason is the true EXPLANATION of the assertion.
If both assertion and reason are true, but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and reason are false.

Solution :R is the correct explanation of A. (In WATER, BENZOIC acid UNDERGOES dissociation while in BENZENE, it undergoes association).
Discussion
32.

Assertion: The molecular weight of benzoic acid when dissolved in benzene is found to be higher than the theoretically calculated molecular weight from formula. Reason: Many organic solutes when dissolved in non-aqueous solvents undergo dissociation.

Answer»

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

ANSWER :C
Discussion
33.

Assertion :- The molarity of a certain solution is always greater than molority. If density of solution is nearly 1gm//ml. Reason :- m=(1000M)/(1000M-MxxM_(solute))

Answer»

If both ASSERTION & REASON are TRUE & the Reason is a CORRECT explanation of the Assertion.
If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.
If Assertion is True but the Reason is False.
If both Assertion & Reason are False

Answer :A
Discussion
34.

Assertion : The molar conductance of weak electrolytes at infinite dilution is equal to sum of the molar conductances of cation and anion. Reason : Kohlrausch's law is applicable to both strong and weak electrolytes.

Answer»

If both assertion and reason are correct and reason is correct EXPLANATION for assertion.
If both assertion and reason are correct but reason is not correct explanation for assertion.
If assertion is correct but reason is incorrect.
If assertion and reason both are incorrect.

Solution :(c ) Correct reason. Kohlrausch's LAW is APPLICABLE only to WEAK ELECTROLYTES.
Discussion
35.

Assertion. The micelle formed by sodium stearte inn water has -COO^(-) groups at the surface. Reason. Surface tension of water is reduced by addition of stearate.

Answer»

If both ASSERTION and REASON are ture, and reason is the trure explanation of the assertion.
If both assertion and reason are TRUE, but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and reason false.

Answer :A
Discussion
36.

Assertion : The molality of the solution does not change with change in tempc- nature. : The molality is expressed in units of moles per 1000 g of solvent. Reason

Answer»

Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is FALSE
A is false but R is true

Answer :A
Discussion
37.

Assertion : The major products formed by heating C_6H_5CH_2-OCH_3 with conc. HI are C_6H_5CH_2I and CH_3OH. Reason : Benzyl cation is more stable than methyl cation.

Answer»

BOTHA and B are true and R is the correct EXPLANATION of A.
A is true but R is False.
A is False but R is True.
Both A and R are false.

SOLUTION :
This is because `C_6H_5overset(+)CH_2` carbocation is MUCH more stable than `overset(+)CH_3`
Discussion
38.

Assertion: The ligands nitro and nitrito are called ambidentate ligands Reason:Nitro and nitrite ligands give linkage isomers.

Answer»

Both Assertion & Reason are TRUE ,Reason is the CORRECT explanation of Assertion
Both Assertion & Reason are true, Reason is not correct explanation of Assertion
Assertion is true , Reason is false
Assertion is false , Reason is false

ANSWER :B
Discussion
39.

Assertion : The IUPAC name of the complex compound [Co(H_2O)_4Cl_2]Cl. 2H_2Ois tetra aquadichlorocobalt (III) chloride. Reason:Tetrahedral complexes exhibit geometrical isomerism.

Answer»

Both ASSERTION & Reason are true ,Reason is the correct explanation of Assertion
Both Assertion & Reason are true, Reason is not correct explanation of Assertion
Assertion is true , Reason is FALSE
Assertion is false , Reason is false

ANSWER :D
Discussion
40.

Assertion : The kinetics of the reaction - mA + nB + pC rarr m'X + n'Y + p'Z obeys the rate expression as - (dx)/(dt) = k[A]^(m) [B]^(n) Reason : The rate of reaction does not depend upon the concentration of C.

Answer»

If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reasonb is false
If both assertion and reason are false.

Solution :Rate expression `(dx)/(dt)=k[A]^(m)[B]^(n)` shows that the TOTAL order of reactions is `m+n+0=m+n` as the rate of reaction is INDEPENDENT of concentration of C, i.e., the order with RESPECT to C is zero. This is the reason that C does not figure in the rate expression.
Discussion
41.

Assertion : The K_(a) value of alpha-amino acids is very low. Reason : alpha-Amino acids have zwitterionic structure.

Answer»

If both ASSERTION and reason are correct and reason is correct explanation for assertion.
If both assertion and reason are correct but reason is not correct explanation for assertion.
If assertion is correct but reason is incorrect.
If assertion and reason are both incorrect.

Solution :Correct explanation. In the ZWITTERION STRUCTURE, `overset(+)(N)H_(3)` GROUP and not COOH group acts as an acid. THEREFORE, it is a very weak acid.
Discussion
42.

Assertion. The hydrolysis of methyl acetate by dilute HCl is a pseudo first order reaction. Reason. HCl acts as a catalyst for the hydrolysis.

Answer»

If both assertion and REASON are true and reason is the true EXPLANATION of the assertion.
If both assertion and reason AE true but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and reason are false.

Solution :Correct explanation. During hydrolysis of methyl acetate by dil HCl, water is taken in LARGE EXCESS and hence, its concentration does not change during hydrolysis.
Discussion
43.

Assertion : The highest oxidation state of osmium is +8. Reason : Osmiumis a 5d -block element.

Answer»

Both assertion and REASON are true and reason is the correct explanation of the assertion .
Both assertion and reason are true but reason is not the correc explanation of assertion.
Assertion is not true for reason is true
Both assertion and reason are false.

Solution :Correct explanation. Osmium has the electronic configuration `5d^(6) 6s^(2) `. As 5d and 6s are CLOSE in ENERGY , all the 8 electrons can participate in bonding.
Discussion
44.

Assertion : The hydrolysis of methyl acetate by dil. HCl is a pseudo first order reaction Reason : HCl acts as a catalyst for the hydrolysis .

Answer»

If both assertion and reason are true and the reason is the CORRECT explanation of the assertion .
If both assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is FALSE
If the assertion and reason both are false .

Solution :The correct reason is that during hydrolysis WATER is taken in LARGE excess , therefore its CONCENTRATION does not change during hydrolysis .
Discussion
45.

Assertion : The HF_(2)^(-) ion exists in the solid state & also in liquid state but not in aqueous state. Reason : The magniture of hydrogen bonds among HF molecules is weaker than that in between HF and H_(2)O.

Answer»

If assertion is true but the REASON is FALSE
If assertion is false but reason is true
If both assertion and reason are true and the reason is the CORRECT EXPLANATION of assertion
If both assertion and reason are true and the reason is not the correct explanation of assertion

Answer :C
Discussion
46.

Assertion. The HF_(2)^(-) ion exists in the solid state and also in liquid state but not in aqueous solution. Reason. The magnitude of hydrogen bonds in between HF-HF molecule is weaker than that in between HF and H_(2)O molecules.

Answer»

If both assertion and REASON are true, and reason is the CORRECT explanation of the assertion.
If both assertion and reason are ture, but reason is not the correct explanantion of the assertion.
If assertion is true, but reason is FALSE.
If both assertion and reason are false

Solution :Correct reason. The magnitude of hydrogen bonds in between HF-HF molecules is stronger than between HF and `H_(2)O` molecules.
Discussion
47.

Assertion : The H-bond present in NH_(3) dissolved in water is best represented by : H-underset(|)underset(H)(N)-H--underset(|)underset(H)(O)-H and not by H-underset(|)underset(H)overset(|)overset(H)(N)---underset(|)underset(H)(H)-O Reason : The O-H bond polarity is more compared to that N-H bond.

Answer»

If ASSERTION is true but the reason is FALSE
If assertion is false but reason is true
If both assertion and reason are true and the reason is the correct explanation of assertion
If both assertion and reason are true and the reason is not the correct explanation of assertion

Solution :The correct representation of hydrogen bonding is `H-overset(H)overset(|)underset(H)underset(|)(N)….H-underset(H)underset(|)(O)` and AMMONIA never acts as acid in aqueous MEDIUM
`NH_(3)+H_(2)O to NH_(2)^(-)+H_(3)O^(+)`
Discussion
48.

Assertion: The geometrical isomers of the complex [M(NH_3)_4Cl_2] are optically inactive Reason: Both geometrical isomers of the complex [M(NH_3)_4Cl_2] possess axis of symmetry

Answer»

Both ASSERTION & Reason are true ,Reason is the CORRECT explanation of Assertion
Both Assertion & Reason are true, Reason is not correct explanation of Assertion
Assertion is true , Reason is false
Assertion is false , Reason is false

ANSWER :A
Discussion
49.

Assertion :- The freezing point is the temperature at which solid crystallizzes from solution. Reason :- The freezing point depression is the difference between that temperature and freezing point of pure solvent.

Answer»

If both ASSERTION and reason are true and the reason is the CORRECT EXPLANATION of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If the assertion and reason both are false.

Answer :B
Discussion
50.

Assertion: The formation of F_((g))^(-) from F_((g)) is exothermic, whereas that of O_((g))^(2-) from O_((g)) is endotherrmic. Reason: The addition of second electron to a monovalent anion is difficult because both have the same charge and experience more repulsion.

Answer»

If both ASSERTION and REASON are TRUE ANND the reason is the correct EXPLANATION of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but the reason is false
if assertion is false but the reason is true

Answer :A
Discussion