1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Given that bond energies of H $$-$$ H and Cl $$-$$ Cl are 430 kJ mol$$-$$1 and 240 kJ mol$$-$$1 respectively and $$\Delta $$Hf for HCl is $$-$$ 90 kJ mol$$-$$1, bond enthalpy of HCl is
A
380 kJ mol$$-$$1
B
425 kJ mol$$-$$1
C
245 kJ mol$$-$$1
D
290 kJ mol$$-$$1
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
A weak acid, HA, has a Ka of 1.00 $$ \times $$ 10$$-$$5. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to
A
1.00%
B
99.9%
C
0.100%
D
99.0%
3
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Calculate the pOH of a solution at 25oC that contains 1 $$ \times $$ 10$$-$$10 M of hydronium ions, i.e. H3O+.
A
4.000
B
9.000
C
1.000
D
7.000
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Which of the compound with molecular formula C5H10 yields acetone on ozonolysis?
A
3-Methyl- 1 -butene
B
Cyclopentane
C
2-Methyl-1-butene
D
2-Methyl-2-butene