?E° of combustion of iso-butylene is -X kJ mol ^-1 . The value of ?H° is

1) = ?E°
2) > ?E°
3) = 0
4) < ?E°

Reduction of a metal oxide by excess carbon at high temperature is a method for the commercial preparation of some metals. This method Can be successfully applied in the case of :

1) BeO and Al₂O₃
2) ZnO and Fe₂O₃
3) CaO and Cr₂O₃
4) BaO and U₃O₈

A 0.2M solution of formic acid is 3% ionised. The value of ionization constant is

1) 1.8
2) 1.8 × 10^-4
3) 0.018
4) 18

0.01 mole of Na₂C₂O₄ dissolve in alkaline solution. This solution is titrated with V ml 0.1M KMnO₄ solution. Find out V

1) 200
2) 200 / 3
3) 40
4) 100 / 3

Which of the following compounds will exhibit geometrical isomerism? 

1) 1 - Phenyl - 2 - butene
2) 3 - Phenyl - 1- butene
3) 2 - Phenyl - 1- butene
4) 1, 1 - Diphenyl - 1 - propane

A formula of a compound, which gives simple whole number atomic ratio in one molecule of a compound, is called

1)  Diastereoisomerism

2)  Geometry isomerism

3)  Keto-enol isomerism

4)  Enantisomerism

The enthalpy of combusion of cyclohexane, cyclohexene and H₂ are respectively -3920, 3800 and -241 kL mol^-1. The heat of hydrogenation of cyclohexene is ...

1) -121.0 kJ/mol
2) 121.0 kJ/mol
3)-242.0 kJ/mol
4) 242.0 kJ/mol

Leaching of Ag₂S is carried out by heating it with a dilute solution of:

1) NaCN only
2) HCl
3) NaOH
4) NaCN in presence of O₂

Only an aldehyde having ____can undergo the aldol condensation.
 1) at least one alpha H atom.
 2) at least one beta H atom.
 3) no alpha H atom.
 4) an aromatic ring

The ionization constant of phenol is more than that of ethanol because:

1) phenoxide ion is a stronger base than ethoxide ion
2) phenoxide ion is stabilized by resonance
3) ethoxide ion is stabilized by resonance
4) phenoxide ion is aromatic while ethoxide ion is aliphatic