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Practice Test - Chemistry 21

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Question 1

The orbital angular momentum for an electron revolving in an orbit is given

. This momentum for an s-electron will be given by

Question 2

Which one of the following molecules is expected to exhibit diamagnetic behaviour?

Question 3

The rate constant for an Isomerisation reaction

of the initial concentration of A is 1 M. Calculate the rate of reaction after 1hr.

Question 4

Consider an endothermic reaction, X → Y with the activation energies E_b and E_f for the backward and forward reactions, respectively. In general

Question 5

Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides?

Question 6

The coordination number and the oxidiation state of the element ‘E’ in the complex [E(en)₂(C₂O₄)]NO₂ (where (en) is ethylene diamine) are, respectively

Question 7

In the transformation of

, if one emission is an α-particle, what should be the other emission(s)?

Question 8

Solid Ba(NO₃)₂ is gradually dissolved in a 1.0 × 10^–4M Na₂CO₃ solution. At what concentration of Ba²⁺ will a precipitate being to form? (K_sp for Ba CO₃ = 5.1 × 10^–9):

Question 9

The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is:

Question 10

Identify `C’ in the following reaction sequence

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Sep 18JEE & BITSAT