AIEEE Exam

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

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AIEEE Other Question

t
1/4 can be taken as the time taken for the
concentration of a reactant to drop to 3/4 of its
initial value. If the rate constant for a first order
reaction is K, then t1/4 can be written as –
(A) 0.10 /K (B) 0.29 /K
(C) 0.69/K (D) 0.75 /K 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