Explore topic-wise InterviewSolutions in Current Affairs.

Statement-1. The number of unpaired electrons present in [CuCl_(2)]^(-) complex is zero. Statement-2. The complex is linear in the solid state with sp-hybridization.

Statement-1: The [Ni(en)_(3)]Cl_(2) has higher stability than [Ni(NH_(3))_(6)]Cl_(2). Statement-2: In [Ni(en)_(3)]Cl_(2), the geometry Ni is octahedral.

Statement 1 : The molecularityof the reaction H_(2) + Br_(2) to 2 HBris 2 . Statement 2 : The order of the reaction is 3/2 .

Statement 1 : The molar concentrations of proton aceeptor and proton donor become equal at the midpoint of titration of a weak acid. Statement 2 : The pK_(a) of a weak acid becomes equal to pH of the solution at the midpoint of its titration.

Statement-1 : The mass fraction of solute in a solution is always greater than its mole fraction Statement-2 : Mole fraction of solvent in an aqueous solution of ethanol must be greater than that of solute

Statement :1 The K_a values of alpha-amino acids are very low. Statement- 2: alpha-amino acids have zwitterionic structures.

STATEMENT-1: The highest oxidation state of chromium in its compounds is +6. and STATEMENT-2: Chromium atom has only six electrons in ns and (n-1)d orbitals.

Statement-1: The heat absorbed during the isothermal expansion of an ideal gas against vaccum is zero. Statement -2: The vaccum occupied by the molecules of an ideal gas is zero.

Statement 1 : The heat absorbed during the isothermal expansion of an ideal gas against vaccum is zero. Statement 2 :The volume occupied by the molecules of an ideal gas is zero.

Statement-1: The geometrical isomers of the complex [M(NH_(4))_(4)Cl_(2)] are optically inactive, and Statement-2: Both geometrical isomers of the complex [M(NH_(3))_(4)Cl_(2)] possess axis of symmetry.

Statement-1: The geometrical isomers of the complex [M(NH_(3))_(4)Cl_(2)] are optically inactive. Statement-2: Both geometrical isomers of the complex [M[NH_(3))_(4)Cl_(2)] possess axis of symmetry.

Statement-1. The geometrical isomers of the complex [M(NH_(3))_(4)Cl_(2)] are optically inactive. Statement-2. The geometrical isomers of the complex [M(NH_(3))_(4)Cl_(2)] possess axis of symmetry.

STATEMENT-1: The gases He and H_(2) are very different in their behaviour at any temperature and pressure but their compressibility factors are nearly same at the critical point. And STATEMENT-2: They have nearly same critical constants.

Statement-1 : The equilibrium constant for a reaction having positive DeltaH^@ increases with increases of temperature and Statement -2 : The temperature dependence of the equilibrium constant is related to DeltaS^@ and not DeltaH^@ for the reaction.

Statement 1 : The enthalpy of formation of H_(2)O(l) is greater than that of H_(2)O(g) in magnitude.Statement 2 :Enthalpy change is negative for the condensationreaction. H_(2)O(g) rarr H_(2)O(l)

Statement 1 : The endothermic reactions are favoured at lower temperature and the exothermic reactions are favoured at higher temperature.Statement 2 : When a system in equilibrium is disturbed by changing the temperature, it will tend to adjust itself so as to overcome the effect of change.

Statement-1: The correct order for the wave length of absorption in the visible region is : [Ni(NO_(2))_(6)]^(4-)lt[Ni(NH_(3))_(6)]^(2+)lt[Ni(H_(2)O)_(6)]^(2+) Statement-2: The stability of different complexes depends on the strength of the ligands field of the various ligands.

Statement-1: The correct distribution of 3d electrons of chromium in the complex [Cr(H_(2)O)_(6)]Cl_(3) is 3d_(xy)^(2),3d_(zy)^(1),3d_(zx)^(0). Statement-2: The complex has a magnetic moment of 3.83 BM.

Statement-1: The complex CoBr_(3)4NH_(3).2H_(2)O has molar conductivity corresponding to 1:3 electrolyte. Statement-2: The formula of the compound is [Co(H_(2)O)_(2)(NH_(3))_(4)]Br_(3).

Statement-1: The cis-[CoCl_(2)(en)_(2)]^(+) has two enantiomers. Statement-2: en in a bidentate mono anion.

Statement-1: The complex [Cr(SCN)(NH_(3))_(5)]Cl_(2) is linkage isomeric with [Cr(NCS)(NH_(3))_(5)]Cl_(2). Statement-2: SCN^(-) is an ambident ligand in which there are two possible coordination sites.

Statement-1: The amount of work done in the isothermal expansion is greater than work done in the adiabatic system for same final volume. Statement-2: In the adiabatic expansion of a gas temperature and pressure both decrease due to decrease in internal energy of the system.

Statement-1: The cell constant of a conductivity cell depends upon the nature of the material of the electrodes. Statement-2: The electrodes of the cell are coated with platinum black to avoid polarisation effects.

Statement 1 :The atomicand ionicradii of d- blockelementsaresmallerthanp- blockand largerthan s-blockelements . Statement II : The colourof transitionmetal ions isdue to thepresence of thepairedelectrons.

Statement-1 : The bond angles of BrNO, CNO and FNO are approximately 11.45^(@), 113.3^(@) and 110.1^(@) respectively. Statement-2 : The hybridisation of central N atom in all three compounds is sp^(2).

Statement-1 : The 5^(th) period of periodic table contains 18 elements not 32. Statement-2 : n=5,l=0,1,2,3. The order in which the energy of available orbitals 4d, 5s, 5p increases is 5slt4dlt5p and the total number of orbitals available are 9 and thus 18 electrons can be accomodated.

Statement - 1 : The alkali metals can form ionic hydrides which contain the hydride ion H^(-) and Statement - 2 : The alkali metals have low electronegativity, their hydrides conduct electricity when fused and liberate hydrogen at the anode.

Statement 1 : The air in electrolytic cell for the extraction of magnesium is replaced by coal gas. Statement 2 : Magnesium is affected by air.

Statement-1. Tetrahedral complexes do not show geometrical isomerism. Statement-2. The relative positions of the ligands attached to the central metal atom in a tetrahedral complex is same with respect to each other.

Statement - 1 : Sulphur exhibits paramagnetic behaviour in the vapour state. Statement -2. In vapour state, sulphur partly exist as S_(2) molecules which have two unpaired electrons in antibonding pi* orbital.

STATEMENT-1 : Tert butyl bromide and sodium ethoxide will react to form only ether and STATEMENT-2 : Ethers are prepared from sodium ethoxide and alkyl halide.

STATEMENT -1 : Sulphate is estimated as BaSO_(4) and not MgSO_(4). and STATEMENT -2: Ionic radii of Mg^(2+) is smaller than that of Ba ^(2+)

Statement - 1 : Sulphide ores are concentrated by froth floatation process. And Statement - 2 : Pine oil acts as a frothing agent in froth floatating process.

STATEMENT-1 : Sucrose is a reducing sugar STATEMENT-2 : Sucrose has two glycosidic linkages. STATEMENT-3: Sucrose shows mutarolation.

Statement-1: Statement-2:Coplanar arrangement of three rings is fluordane, allows more extensive delocalisation in conjugate anion.

Statement 1: Sulphate is estimated as BaSO_(4) and not as MgSO_(4). Statement 2: Ionic radius of Mg^(2+) is smaller than that of Ba^(2+)

Statement-1 : Strength of H-bonding depends upon temperature . Statement-2 : H-bonding has no effect on specific heat of a substance . Statement-3 : One hydrogen atom bonded to an electronegative element can form only one H-bond .

Statement-1 : Statement - 2 : P_(1) is having 6 alpha-H while P_(2) is having 5alpha-H" so "P_(1) is Saytzeff a alkene.

Statement-1 : Statement-2 : Reaction proceeds via inversion configuration in SN_(2)

STATEMENT - 1 :STATEMENT - 2 : Hi can act as reducing agent and red P acts as catalyst for this reaction.

Statement-1 : Statement-2 : Hydrolysis of, , involves unimolecular mechanism.

Statement-1 : Statement-2 : reaction proceeds by electrophilic aromatic substitution.

Statement-1: Specific gravity is dimensionless quantity. Because Statement-2: Specific gravity is relative density of a substance, measured with respect to density of water at 4^(@)C.

Statement- 1 : Standardfree energyofformation(Delta _f G^(@))for Al_2O_3and Cr_2O_ 3at1273 Kare- 827kJ mol^(-1 )ofO _2 and- 540 kJ mol^(-1 )ofO_2respectively. Statement -2 : Al can reduceCr_ 2O_3to Crsince,Delta _r G^(@)is negative.

Statement 1: Spectrallines are never obtained when electron de-excites from d_(xy) to d_(yz) because they are degenerate. Statement 2:When ligands approach central metal ion its d-orbitals split into two sets.

Statement -1 : Statement-2 : Conjugate base of , is more stable