Question

8. Among Na+, Ca2+, Mg2+ and Al3+ which has high polarising power?

(a) Na+

(b) Ca2+ (c) Al3+ (d) Mg2+


9. For which of the following gaseous reactions Δu ≠ ΔH?.........

(a) N2 + O2 → 2NO (b) H2 + I2 → 2HI (c) N2 + 3H2 →2NH3 (d) All


10. One mole of hydrogen and 2 mole of iodine are taken initially in a 2L vessel. The number of mole of hydrogen at

equilibrium is 0.2. The number of moles of I2, HI at equilibrium are…….

(a) 1.2, 1.6 (b) 1.8, 1.0 (c) 0.4, 2.4 (d) 0.8, 2.0


11. Cyclic compounds which contains atom like nitrogen, oxygen and sulphur in the ring in addition to carbon are known

as……

(a) Homocyclic (b) Hetercyclic (c) Homogenous (d) Aromatic


12. Addition of ferric chloride to NaCNS it coverts into…….

(a) FeC(NS)2 (b) Fe(CNS)3 (c) FeCN3 (d) NaCNS


13. Bromine water is decolourised by……..

(a) ethane and ethyne (b) ethene and ethyne (c) ethene and ethane (d) ethyne and ethane


14. Wurtz – fitting reaction is…….

(a) C6H5COONa → C6H6 (b) C6H5Br + Na + CH3Br → C6H5CH3 + 2NaBr

(c) C6H6 + CH3Cl → C6H5CH3 + HCl (d) C6H6 + Br2 → C6H5Br + HBr


15. Statement – I : The order of stability of the carbonium ion is 1 carbonium ion 2 carbonium ion 3 carbonium ion.

Statement - II : The stability of the carbonium ion depends on the extent to which the degree of the positive charge is

decreased

(a)Both the statements are individually true but statement – II is not the correct explanation of statement –I

(b) Both the statements are individually true but statement – II is the correct explanation of statement –I

Answer 1

Na + has highest polarising power among them

Answer 2

nitrogen ,+ ammonia .
i hope it will help you