JEE (Advance), 2015 - Chemistry

The pH of the solution after Expt. 2 is A) 2.8 B) 4.7 C) 5.0 D) 7.0

When \(O_2\) is adsorbed on a metallic surface, electron transfer occurs from metal to \(O_2\). The TRUE statement(s) regarding this adsorption is (are) A) \(O_2\) is physisorbed B) Heat is released C) Occupancy of \(\pi_{2p}^*\) of \(O_2\) is increased D) bond length of \(O_2\) is increased

Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination respectively, are A) CH3SiCl3 and Si(CH3)4 B) (CH3)2SiCl2 and (CH3)3SiCl C) (CH3)2SiCl2 and CH3SiCl3 D) SiCl4 and (CH3)3SiCl

The pair(s) of ions where BOTH the ions are precipitated upon passing H2S gas in presence of dilute HCl, is (are) A) Ba2+, Zn2+ B) Bi3+, Fe3+ C) Cu2+, Pb2+ D) Hg2+, Bi3+

The correct statement(s) regarding, (i) HClO, (ii) HClO2, (iii) HClO3 and (iv) HClO4 is (are) A) The number of Cl = O bonds is (ii) and (iii) together is two B) The number of lone pairs of electrons on Cl in (ii) and (iii) together is three C) The hybridization of Cl in (iv) is sp3 D) Amongst (i) to (iv), the strongest acid is (i)

Among the complex ions, \([Co(NH_2CH_2CH_2NH_2)_2Cl_2]^+\), \([CrCl_2(C_2O_4)_2]^{3-}\), \([Fe(H_2O)_4(OH)_2]^+\), \([Fe(NH_3)_2(CN)_4]^-\), \([Co(NH_2CH_2NH_2)_2(NH_3)Cl]^{2+}\) and \([Co(NH_3)_4(H_2O)Cl]^{2+}\), the number of complex ion(s) that show(s) cis-trans isomerism is

In the complex acetylbromidodicarbonylbis(triethylphosphine)iron(II), the number of Fe – C bond(s) is

In dilute aqueous \(H_2SO_4\), the complex diaquodioxalatoferrate(II) is oxidized by \(MnO^-_4\). For this reaction, the rate of the change of \(H^+\) to the rate of change of \(MnO^-_4\) is

The molar conductivity of a solution of a weak acid HX (0.01 M) is 10 times smaller than the molar conductivity of a solution of a weak acid HY (0.10 M). If \(\lambda_{H^-}^o \approx \lambda_{Y^-}^o\), the difference in their \(pK_a\) values, \(pK_a (HX)\) – \(pK_a (HY)\) is (consider degree of ionization of both acids be << 1)