All India Engineering Entrance Examination Model Question Paper

Will you please provide here Model question paper of All India Engineering Entrance Exam I am looking for the same here ?

[Shaleen]

As you want I am here giving you Model question paper of All India Engineering Entrance Exam.

Sample paper :

The standard enthalpy of formation of NH3 is -46.0 kJ mol-1
. If the enthalpy of formation of H2 from
its atoms is -436 kJ mol-1 and that of N2 is -712 kJ mol-1
, the average bond enthalpy of N-H A •n
NH3 is
(1) -964 kJ mol-1 (2) +352 kJ mol-1 (3) + 1056 kJ mol-1 (4) -1102 kJ m
1. (2)

Sol : Enthalpy of formation of NH3 = -46 kJ/mole
:. N2 + 3H2 ---+ 2NH3 L\Hr = - 2 x 46 kJ mol
Bond breaking is endothermic and Bond formation is exothermic
Assuming 'x' is the bond energy of N-H bond (kJ mol-1
)
:. 712 + (3 X 436)- 6X = -46 X 2
:. x = 352 kJ/mol • 2. The time for half life period of a certain reaction A ---+ prod ts s hour. When the initial
concentration of the reactant 'A', is 2.0 mol L -\ how much ti o e for its concentration to
come from 0. 50 to 0. 25 mol L -1 if it is a zero order reaction ?
(1)4h (2)0.5h (3)0.25 (4)1 h
2. (3)

One mole of a symmetrical alkene on ozonolysis gives two m
mass of 44 u. The alkene is
(1) propene (2) 1-butene
(3)

2-butene is symmetrical alkene
CHrCH=CH-CH3 zn~~20 ) 2.CH3CHO
Molar mass of CH3CHO is 44 u.
ehyde having a molecular
(4) ethane

29.5 mg of an organic compound containing nitrogen was digested accordiE • Ela s method
and the evolved ammonia was absorbed in 20 ml of 0.1 M HCI solution. lee e~ess of the acid
required 15 ml of 0.1 M NaOH solution for complete neutralization. The pe~e of nitrogen in
the compound is
(1) 59.0 (2) 47.4 (3) 23.7 2~
(3)

On mixing, heptane and octane form an ideal solution. At 373 K, the vapour pressures of the two
liquid components (heptane and octane) are 105 kPa and 45 kPa respectively. Vapour pressure of
the solution obtained by mixing 25.0g of heptane and 35 g of octane will be (molar mass of heptane
= 1 00 g mol-1 an dof octane = 114 g mol-1

(1 )72. 0 kPa (2) 36. 1 kPa (3) 96.2 kPa (4) 144.5 kPa
1 5. ( 1 )

Here is the attachment.