IIT-JEE Exam

The number of structural isomers for C6H14 is
(A) 3 (B) 4
(C) 5 (D) 6

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IIT-JEE Other Question

The piston is taken completely out of the cylinder. The hole at the top is sealed. A
water tank is brought below the cylinder and put in a position so that the water surface
in the tank is at the same level as the top of the cylinder as shown in the figure. The
density of the water is ρ. In equilibrium, the height H of the water column in the
cylinder satisfies
(A) ρg(L0−H)2 + P0(L0 − H) + L0P0 = 0
(B) ρg(L0−H)2 − P0(L0 − H) − L0P0 = 0
(C) ρg(L0−H)2 + P0(L0 − H) − L0P0 = 0
(D) ρg(L0−H)2 − P0(L0 − H) + L0P0 = 0 When 20 g of naphthoic acid (C11H8O2) is dissolved in 50 g of benzene (Kf = 1.72 K kg mol−1), a freezing point
depression of 2 K is observed. The van’t Hoff factor (i) is
(A) 0.5 (B) 1
(C) 2 (D) 3