1
IIT-JEE 1991
MCQ (Single Correct Answer)
+1
-0.25
The hybridization of carbon atoms in C-C single bond of HC $$ \equiv $$ C - CH = CH2 is
A
$$sp^3 - sp^3$$
B
$$sp^2 - sp^3$$
C
$$sp - sp^2$$
D
$$sp^3 - sp$$
2
IIT-JEE 1991
Subjective
+4
-0
The degree of dissociation of calcium nitrate in a dilute aqueous solution, containing 7.0 g. of the salt per 100 gm of water at 100oC is 70%. If the vapour pressure of water at 100oC is 760 mm, calculate the vapour pressure of the solution.
3
IIT-JEE 1991
Subjective
+2
-0
Zinc granules are added in excess to a 500 ml. of 1.0 M nickel nitrate solution at 25oC until the equilibrium is reached. If the standard reduction potential of Zn2+ | Zn and Ni2+ | Ni are -0.75 V and -0.24 V respectively, find out the concentration of Ni2+ in solution at equilibrium.
4
IIT-JEE 1991
Subjective
+4
-0
The current of 1.70 A is passed through 300.0 ml of 0.160 M solution of a ZnSO4 for 230 sec. with a current efficiency of 90%. Find out the molarity of Zn2+ after the deposition of Zn. Assume the volume of the solution to remain constant during electrolysis.
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