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1.

Experimentally it was found that a metal oxide has the formula M0.98O. Metal M. present as M2+ and M3+  in its oxide. Fraction  of the metal which exists as M3+  would be


A) 7.01%

B) 4.08%

C) 6.05%

D) 5.08%



2.

The gas leaked from  a storage  tank of  the union carbude plant in Bhopal gas tragedy was


A) Methyl isocyanate

B) Methylamine

C) Ammonia

D) phosgene



3.

 Unknown alcohol is treated with the "Lucas reagent"  to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism?


A) Secondary alcohol by $S_{N}1$

B) Tertiary alcohol by $S_{N}1$

C) Secondary alcohol by $S_{N}2$

D) Tertiary alcohol by $S_{N}2$



4.

Stability of the spcies Li2, Li2-, and Li2+  increases in the order of


A) $Li_{2}^{}$ < $Li_{2}^{+}$ < $Li_{2}^{-}$

B) $Li_{2}^{-}$ < $Li_{2}^{+}$ <$Li_{2}^{}$

C) $Li_{2}^{}$ < $Li_{2}^{-}$ < $Li_{2}^{+}$

D) $Li_{2}^{- }$ < $Li_{2}^{}$ < $Li_{2}^{+}$



5.

The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be


A) -2.55 eV

B) -5.1 eV

C) -10.2 eV

D) +2.55 e V



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