Category: Chemistry MCQs

(i) Which of the following substituent deactivates benzene ring and is o, p-directing?(a) __ NH2 (b) __ Cl(c) __ OCH3 (d) __ OH (ii) Which of the following is most readily nitrated?(a) Toluene (b) Benzaldehyde (c) Nitrobenzene (d) Benzoic Acid (iii) Ketones can be prepared by reaction of Grignard reagent with:(a) Acid Amides (b) Acid […]

BSc Chemistry MCQs

(2) If the rate of a reaction does not change with time then the reaction should be:(a) moderately slow (b) very fast (c) catalyzed(d) zeroth order (e) None of these. (3) If a chemical reaction reaches equilibrium state: (a) its forward and backward rates are equal (b) its overall free energy change becomes zero (c) […]

(i) When an electron is brought from infinite distance close to the nucleus of the atom, the energy of Electron-nucleus system?(a) increases to a smaller negative value(b) decreases to a greater negative value(c) decreases to a smaller positive value(d) increases to a greater positive value (ii) The probability of finding the electron in the nucleus […]