1 Crore+ students have signed up on EduRev. Have you? |
Q.1. AgCN dissolves in excess KCN solution to give the complex compound ........... (1980)
Ans. K[Ag(CN)2]
Solution. K[Ag(CN)2]
Q.2. Mn2+ can be oxidised to Mn O-4 by ................. (1981 - 1 Mark)
(SnO2, PbO2, BaO2)
Ans. PbO2
Solution. PbO2;
Q.3. Galvanization of iron denotes coating with ............... (1983 - 1 Mark)
Ans. zinc
Solution. Zinc;
Q.4. Silver chloride is sparingly soluble in water because its lattice energy is greater than .............. energy. (1987 - 1 Mark)
Ans. hydration/solvation
Solution. Hydration/solvation; [A substance dissolves when its ΔHhydration > lattice energy]
Q.5. The salts ............... and ............... are isostructural. (1988 - 1 Mark)
(FeSO4.7H2O, CuSO4.5H2O, MnSO4.4H2O, ZnSO4.7H2O)
Ans. FeSO4.7H2O, ZnSO4.7H2O
Solution. FeSO4.7H2O, ZnSO4.7H2O ;
Q.6. The type of magnetism exhibited by [Mn(H2O)6]2+ ion is .............
Ans. Paramagnetism; [Mn(H2O)6]2+ shows paramagnetism because of presence of 5 unpaired electrons in the outer most orbital (3d5) of Mn2+.
Q.7. The IUPAC name of [Co(NH3)6] Cl3 is ............. (1994 - 1 Mark)
Ans. paramagnetism
Solution. Hexammine cobalt (III) chloride
Q.8. When Fe(s) is dissolved in aqueous hydrochloric acid in a closed vessel, the work done is ........... (1997 - 1 Mark).
Ans. zero
Solution. zero
Q.9. Silver jewellery items tarnish slowly in the air due to their reaction with ............... .
Ans. H2S
Solution. H2S; It is due to formation of sulphide of silver (Ag,S) which is black.
142 docs|66 tests
|