||MCQS for JEE and AIPMT || HOME
TOPIC:: BORON FAMILY: PAGE#21
CLICK ON THE CORRECT OPTION,
TO GET SOLUTION, CLICK ON SOLUTION

Q81) Hydrogen gas is liberated by the action of aluminium with concentrated solution of ... [ IIT 1987]




SOLUTION


Answer: (c)


Q82) Which of the following statements about anhydrous aluminum chloride is correct? [ IIT 1981]




SOLUTION

AlCl3 exists as dimer, strong lewis acids and gets hydrolyses easily
Answer: (c)


Q83) Which of the following is not protonic acid



SOLUTION

An acid that forms positive hydrogen ions in aqueous solution. The term is used to distinguish ‘traditional’ acids from Lewis acids or from Lowry-Bronsted acids in nonaqueous solvents.
B(OH)3 + H2O → B(OH)4 - + H+
Answer:(d)



Q84) AlCl3 fumes in moist air because



SOLUTION

In moist air AlCl3 get hydrolyzed and produce HCl which fumes in moist air
AlCl3 + 3H2O → Al(OH)3 + OH
Answer: (b)


logo
All contents ©Copyright 2013 www.gneet.com
Site Design © 2013 All Rights Reserved Gore Coaching Classes