Explore topic-wise InterviewSolutions in Current Affairs.

Statement - 1 : Levigation is used for the separation of oxide ores from impurities. And Statement - 2 : Impurities are removed by washing in a current of water.

Statement - 1 : Lead, tin and bismuth are purified by liquation method. And Statement - 2 : Lead, tin and bismuth have low m.p. as compared to impurities.

Statement-1. Lanthanoids showa limited number of oxidation states whereas actinoids show a large number of oxidation states. Statement-2. Energy gap between4f, 5d and 6s subshells is small whereas that between 5f, 6d and 7s subshells is large.

STATEMENT-1: KMnO_(4), is purple in colour due to charge transfer. and STATEMENT-2: In Mno, there is no electron present in d-orbitals of manganese.

STATEMENT-1: KMnO4 is not used as a primary standard substance. STATEMENT-2: It is deliquescent in nature.

STATEMENT-1: KMnO_(4) is coloured due to d-d transition . STATEMENT-2: Colour due to d-d transition will be less intense . STATEMENT-3: Fe[Fe(CN)_(6)] will retain a brown coloured complexafter a long time of its formation .

Statement- 1 : Keratin is a globular protein. Statement -2 : Enzymes are globular proteins.

STATEMENT-1: KCN gives K_(3) [Cu(CN)_(4)] complex compound with CuSO_(4) solution and STATEMENT-2: KCN reduces Cu^(2+) to Cut and then forms a complex compound

Statement-1: K_(3)[VF_(6)]" and "KMnO_(4) are coloured compounds. Statement-2: The colour of the compound is attributed to d-d transition in both the compounds.

Statement-1. K_(2)[Ni(EDTA)] is more stable than K_(3)[Al(C_(2)O_(4))_(3)]. Statement-2. Nickel (Ni) is a transition element while aluminium (Al) is non-transition element.

STATEMENT-1: K_(2) CrO_(4), has yellow colour due to charge transfer. and STATEMENT-2: Cro ion is tetrahedral in shape

STATEMENT-1 K prop e^(-E//RT) , the Arrhenius equation represents the dependence of rate constant with temperature. and STATEMENT-2 Plot of log K against (1)/(T) is linear and the activation energy can be calculated with this plot

Statement-1: Iron is protected from corrosion by connecting magnesium metal with it. Statement-2: Iron acts as a cathode and magnesium as anode which gradually disappear.

Statement-1 : Ionization energy of s-electrons are more than the p-electrons for the same shell. Statement-2 : s electrons are closer to the nucleus than p-electrons, hence, more tightly attached.

Statement-1: In Zeise's salt relative to free ethylene, the C-C bond is lengthened slightly from 133.7 pm to 137.5 pm. Statement-2: The bond between the ethylene molecule and the metal ion may be considered as a dative sigma-bond to an available orbital on the metal in Zeise's salt.

Statement-1 : In ZnS zinc blende structure Zn^(2+) from FCC while alternate tetrahedral voids are occupied by S^(2-). Statement-2: Positions of Zn^2+ and S^(2-) in zinc blende structure are similar.

Statement-1: Inter-stitial carbides are formed when heavy metals react chemically with C(gas). Statement-2: In such carbides 'C' occupy voids available in heavy metals.

Statement-1: In Zeise's salt C-C bond order regarding ethylene molecule is less than two. Statement-2: Ethylene accepts electron pair from filled d-orbital of Pt^(2+) into its vacant bonding M.O.

Statement-1. In the reaction, N_(2)+3" H"_(2)to 2" NH"_(3), the rate of reaction is different in terms of N_(2), H_(2) and NH_(3). Statement-2. Rate of disappearanceof N_(2) and H_(2) and rate of formation of NH_(3) are not equal to each other.

Statement-1: In the reaction [CoCl_(2)(NH_(3))_(4)]^(+)+Cl^(-) to [CoCl_(3)(NH_(3))_(3)]+NH_(3), when reactant is in cis-form two isomers of the product are obtained. Statement-2: Third chloride ions replaces an ammonia cis to both chloride ion or trans to one of the chloride ion.

Statement 1: In the daniel cell, if the concentration of Cu^(2+) and Zn^(2+) ions are doubled, the cell potential will be doubled. Statement 2: if the concentration of ions reversible to the electrode is doubled, the electrode potential is also doubled.

Statement 1: In the iodometric titration starch is used as an indicator. Statement 2: Starch is a polysaccharide.

Statement-1: In the complex [Co(NH_(3))_(3)Cl_(3)], chloride ions staisfy the primary valencies as well as the secondary valencies of cobalt metal. Statement-2: [Co(NH_(3))_(3)Cl_(3)] shows geometrical as well as the optical isomerism.

Statement-1: In the coordination complex [Pt(NH_(3))_(4)Cl_(2)]Br_(2), a yellow prcipitate of AgBr is obtained on treating it with AgNO_(3). Statement-2: Bromide ions are present as counter ions in the ionization sphere.

Statement-1: In tetrahedral hybridisation i.e., in sp^3 hybridisation all p-orbitals are involved and no p-orbital is left for forming pi-bonds. Statement-2: Central atom cannot form double bonds in the molecules or species having sp^3 hybridisation.

Statement-1: In strongly acid solutions, aniline becomes less reactive less reactive towards electrophilic reagents. Statement-2: The amino group being completely protonated in strongly acidic solution, the lone pair of electrons on the nitrogen in no longer available for resonance.

Statement - 1 : In smelting, roasted ore is heated with powdered coke in presence of a flux. And Statement - 2 : Oxides are reduced to metals by C or CO. Impurities are removed as slag.

STATEMENT - 1 : In rock salt structure, all the octahedral voids in the close packing of anions are occupied by cations.andSTATEMENT - 2 : In rock salt structure, the distance of closest approach between two anions equal to half the face diagonal of the unit cell.

Statement-1: In OC-M-CO if one CO is replaced by better pi-acceptor ligand than CO, then stretching frequency of C-O bond increases. Statement-2: If replaced ligand is better pi-acceptor, it will reduce the flowof electron in the pi^(**) orbital of CO.

Statement-1: In protic solvents phenoxide ion is alkylated primarily at C-alkylation whereas in polar aprotic solvents O-alkylation with alkyl halide. Statement-2 : C-alkylation products are more stable then O-alkylation products.

Statement -1 InphenylbenzoateFrie'srearrangementsis fasterthan ethylbenzoate Statement -2Phenylacylium cationismorestablethan ethylacyliumcation.

Statement-1: In Mn_(2)(CO)_(10) molecule, there are total 70 electrons in both Mn atoms. Statement-2: Mn_(2)(CO)_(10) molecule acts as a strong oxidising agent.

Statement-1 : In hydrazine each nitrogen atom is tetrahedrally surrounded by one N, two H and a lone pair. The N-N bond length is 1.45Å (normal N-N bond length). Statement-2 : The two halves of the molecules are rotated 95^(@) about the N-N bond and adopt gauche (non-eclipsed) conformation.

Statement-1 : In graphite, on increasing the temperature the conductivity decreases along the layers of carbon atoms. Statement-2 : Graphite cleaves easily, because the force of attraction between the layers is weak van der Wall,s force.

Statement-1: In Friedel-Craft's acylation reaction multiple acyclation product is obtained and Statement-2 Introduction of alkyl group activates benzene ring.

Statement 1: In electrolysis, the quantity of electricity needed for depositing 1 mole of silver is differennt from the required for 1 mole of copper. and Statement -2: The molecular weights of silver and copper are different.

Statement-1: In [Co(en)_(3)]Cl_(3), the coordination number of Co^(3+) ion is 3. Statement-2: 'en' is a bidentate ligand.

Statement 1: In BF_(3). Lewis acidic character is completely lost. Statement 2: 2p_(pi).2p_(pi) type of very strong back bonding is operative here.

Statement-1 : In case of persulphuric acid, the K_(1)gtgtK_(2). Statement-2 : The anion of persulphuric acid is intermolecular hydrogen bonded.

Statement - 1 : In aluminothermic process, Al reduction increases the heat of the reaction. And Statement - 2 : During reduction, Al_(2)O_(3) is formed which is an exothermic process.

Statement-1: In alkali metal chlorates LiClO_(4) is most soluble in water. And Statement -2 Alkali metals chlorates are ionic crystal.

Statement-1. In a zero orderreaction, if concentration of the reactant is doubled, half-life period is also doubled. Statement-2. The total time taken for a zero order reaction to complete is double of the half-life period.

Statement -1: In A overset(k_(1))to B overset(k_(2))to C If half life of A is very less as compared to B, then, net reaction is A to C with rate constant (k_(1)xxk_(2)) Statement-2: Slowest step is the rate determining step si B to C is rate determining step.

Statement-1. In a gaseous reaction, the ratio of volumes of reactants and geseous products is in agreement with their molar ratio. Statement-2. Volume of gas is inversely proportional to its moles at particular temperature and pressure.

Statement 1: If standard reduction potential for the reaction, Ag^(+) | e^(-) to Ag is 0.80 volt, then for the reaction. 2Ag^(+) + 2e^(-) to 2Ag^(+) + 2e^(-) to 2Ag. If will be 1.60 volt. and Statement -2: If concentration of Ag^(+) ions is doubled, the electrode potential is also doubled.

Statement-1: If the activation energyof reaction is zero, temperture will have no effect on the rate constant. Statement -2: Lower the acitvation energy faster is the reaction.

Statement-1: if an aqueous solution of NaCl is electroysed, the product obtained at the cathode is H_(2) gas and not Na. Statement-2: Gases are liberated faster than the metals during the electrlysis of electrolyte.