Related InterviewSolutions

• The colour changes of an indicator HIn in acid base titrations is given belowHIn (aq)⇋ H+ (aq) + In– (aq)Colour X Colour YWhich of the following statements is correct? (A) In a strong alkaline solution colour Y will be observed (B) In a strong acidic solution colour Y will be observed (C) Concentration of in– is higher than that of HIn at the equivalence point (D) In a strong alkaline solution colour X is observed
• Which of the following has the shortest bond length? (A) O2 (B) O-2(C) O+2(D) O-22
• The complex ion that does not have d electrons in the metal atom is(A) [MnO4]–(B) [Co(NH3)6]3+(C) [Fe(CN)6]3–(D) Cr(H2O)6]3+
• Which of the following cannot act as an oxidising agent ? (A) S2– (B) Br2 (C) HSO-4 (D) 2SO3
• Ellingham diagrams are plots of ΔGº vs temperature which have applications in metallurgy2H2 + O2 = 2H2O ΔG(J) = –247500 +55.85 T ........ (I)2CO + O2 = 2CO2 ΔG(J) = –282400 +86.81 T.......... (II)The Ellingham diagrams for the oxidation of H2(I) and CO (II) are given below.The two lines intersect (TE) at 1125 K.Which of the following is correct ?I. Δ Gº for reaction (i) is more negative at T < 1125KII. Δ G° for the reduction of CO is more negative at T < 1125 KIII. H2 is a better reducing agent at T > 1125 KIV. H2 is a better reducing agent at T < 1125 K(A) I and II (B) I and III (C) III only (D) I and IV