Multiple Choice QuestionsAssertion : Compressibility factor for hydrogen varies with pressure with positive slope at all pressures.
Reason : Even at low pressures, repulsive forces dominate hydrogen gas.
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 reason is false.
If both assertion and reason are false.
Assertion : Rates of nitration of benzene and hexadeuterobenzene are different.
Reason : C- H bond is stronger than C- D bond.
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 reason is false.
If both assertion and reason are false.
Assertion : p-O2N- C6H5COCH3 is prepared by Friedel Crafts acylation of nitrobenzcne.
Reason : Nitrobenzene easily undergoes electrophilic substitution reaction.
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 reason is false.
If both assertion and reason are false.
Assertion : Alkyl isocyanides in acidified water give alkyl formamides.
Reason : In isocyanides, carbon first acts as a nucleophile and then as an electrophile.
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 reason is false.
If both assertion and reason are false.
Assertion : Cyclopentadienyl anion is much more stable than allyl anion.
Reason : Cyclopentadienyl anion is aromatic in character.
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 reason is false.
If both assertion and reason are false.
An aqueous solution of CoCl2 on addition of excess of concentrated HCl turns blue due to formation of
[Co(H2O)4Cl2]
[Co(H2O)2Cl4]2-
[CoCl4]2-
[Co(H2O)2Cl2]
In which of the following pairs both the complexes show optical isomerism?
cis-[Cr(C2O4)2Cl2]3-, cis-[Co(NH3)4Cl2]
[Co(en)3]Cl3, cis-[Co(en)2Cl2]Cl
[PtCl(dien)]Cl, [NiCl2Br2]2-
[Co(NO3)3(NH3)3], cis-[Pt(en)2Cl2]
The number of P - O - P bridges in the structure of phosphorus pentoxide and phosphorus trioxide are respectively
6, 6
5, 5
5, 6
6, 5
The correct order for the wavelength of absorption in the visible region is
[Ni(NO2)6]4- < [Ni(NH3)6]2+ < [Ni(H2O)6]2+
[Ni(NO2)6]4- < [Ni(H2O)6]2+ < [Ni(NH3)6]2+
[Ni(H2O)6]2+ < [Ni(NH3)6]2+ < [Ni(NO2)6]4-
[Ni(NH3)6]2+ < [Ni(H2O)6]2+ < [Ni(NO2)6]4-
A.
[Ni(NO2)6]4- < [Ni(NH3)6]2+ < [Ni(H2O)6]2+
The absorption of energy or the observation of colour in a complex transition compound depends on the charge of the metal ion and the nature of the ligands attached. The same metal ion with different ligands shows different absorption depending upon the type of ligand. The presence of weak field ligands make the central metal ion to absorb low energies i.e. of higher wavelength. The field strength of ligands can be obtained from spectrochemical series. i.e.
(weak field) I- < Br- < S2- < Cl- < NO3- < F- < OH- < H2O < NH3 < NO2- < CN- < CO (strong field)
The chemical reaction,
2AgCl (s) + H2 (g) → 2HCl (aq) + 2Ag (s)
taking place in a galvanic cell is represented by the notation
Pt(s)| H2 (g), 1 bar | 1 M KCl (aq) | AgCl (s) | Ag (s)
Pt(s)| H2 (g), 1 bar | 1 M HCl (aq) | 1M Ag+(aq) | Ag (s)
Pt(s)| H2 (g), 1 bar | 1 M HCl (aq) | AgCl (s) | Ag (s)
Pt(s)| H2 (g), 1 bar | 1 M KCl (aq) | Ag (s) | AgCl (s)
Switch
