1
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
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A red solid is insolvable in water. However it becomes soluble if some $$K{\rm I}$$ is added to water. Heating the red solid in a test tube results in liberation of some violet colored fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is :
A
$$Hg{{\rm I}_2}$$
B
$$HgO$$
C
$$P{b_3}{O_4}$$
D
$${\left( {N{H_4}} \right)_2}C{r_2}{O_7}$$
2
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
A pressure cooker reduces cooking time for food because
A
boiling point of water involved in cooking is increased
B
the higher pressure inside the cooker crushes the food material
C
cooking involves chemical changes helped by a rise in temperature
D
heat is more evenly distributed in the cooking space
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3. Taking kf for water as 1.85, the freezing point of the solution will be nearest to
A
-0.360oC
B
-0.260oC
C
+0.480oC
D
-0.480oC
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
If liquids A and B form an ideal solution
A
the entropy of mixing is zero
B
the free energy of mixing is zero
C
the free energy as well as the entropy of mixing are each zero
D
the enthalpy of mixing is zero
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