IIT-JEE Exam

The molarity of a solution obtained by mixing 750
mL of 0.5(M)HCl with 250 ml of 2(M)HCl will be-
(1) 1.75 M (2) 0.975 M
(3) 0.875 M (4) 1.00 M

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IIT-JEE Other Question

How many litres of water must be added to 1 litre
of an aqueous solution of HCl with a pH of 1 to
create an aqueous solution with pH of 2 ?
(1) 2.0 L (2) 9.0 L
(3) 0.1 L (4) 0.9 L A piston filled with 0.04 mol of an ideal gas
expands reversibly from 50.0 mL to 375 mL at a
constant temperature of 37.0ºC. As it does so, it
absorbs 208 J of heat. The values of q and w for the
process will be -
(R = 8.314 J/mol K) (ln 7.5 = 2.01)
(1) q = – 208 J, w = + 208 J
(2) q = + 208 J, w = + 208 J
(3) q = + 208 J, w = – 208 J
(4) q = – 208 J, w = – 208 J