AIEEE Exam

On addition of 1 ml solution of 10% NaCl to 10
ml of gold sol in the presence of 0.025g of starch
the coagulation is just prevented. The gold
number of starch is–
(A) 0.025 (B) 0.25 (C) 2.5 (D) 25

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AIEEE Other Question

Energy required to dissociate 4g of H2(g) into
free gaseous atoms is x kJ. The value of
∆HH – H will be–
(A) x kJ mol–1 (B) x/2 kJ mol–1
(C) x/3 kJ mol–1 (D) 0.25x kJ mol–1 The pair in which both species have the same
magnetic moment (spin only value) is –
(A) [Cr(H2O)6]2+, [CoCl4]2–
(B) [Cr(H2O)6]
2+, [Fe(H2O)6]
2+
(C) [Mn(H2O)6]2+, [Cr(H2O)6]2+
(D) [CoCl4]2–, [Fe(H2O6)]2