Find JEE (Main) Chemistry Practice Paper for the year 2016 JEE exam. These questions not only help the students to prepare for exams in a better manner but also help them in understanding the depth with which a topic should be studied.
Few sample questions from the Question Paper are given below:
Q. Which is the acid with the lowest pKa value?
(a) p-nitroanilium ion
Q. Reaction of HBr with 3-bromocyclohexene (A) yields only trans-1,2-dibromo-cyclohexane. Reaction of 3-methylcyclohexene (B) with HBr gives a mixture of cis and trans-1-bromo-3-methylcyclohexane and 1-bromo-1-methyl cyclohexane. Which statement explains the reactivity differences between A and B?
(a) There is no difference in reactivity. In the case of A the 1,2 and 1,3-dibromo products can't be distinguished
(b) The bromonium ion formed in the case of A can be attacked only in the anti manner
(c) A has a chiral center and B has a plane of symmetry
(d) In the case of B, there is a hydride shift following protonation
Q. Why do polar aprotic solvents increase the rates of SN2 reactions?
(a) Aprotic solvents always have low polarity.
(b) Aprotic solvents raise the energy of the products and therefore, accelerate the reaction.
(c) Aprotic solvents better solvate the leaving group and therefore, accelerate the reaction.
(d) Aprotic solvents solvate the nucleophile less, and "naked" nucleophiles are more reactive.
Q. Among the following four compounds:
Q. The decreasing acidity order is:
(a) (iv) > (iii) > (i) > (ii)
(b) (iii) > (iv) > (i) > (ii)
(c) (i) > (iv) > (iii) > (ii)
(d) (ii) > (i) > (iii) > (iv)
Q. Which of the following reagents may be used to distinguish between phenol and benzoic acid?
(a) Tollens’ reagent
(b) Molisch reagent
(c) Neutral FeCl3
(d) Aqueous NaOH