Lakhmir Singh and Manjit Kaur Solutions for Chapter: Acids, Bases And Salts, Exercise 15: Questions Based on High Order Thinking Skills (HOTS)

Consider the following substances:                                               $\mathrm{NaCl},\mathrm{Ca}{\left(\mathrm{OH}\right)}_2,{\mathrm{NaHCO}}_3,{\mathrm{NH}}_3,{\mathrm{Na}}_2{\mathrm{CO}}_3,{\mathrm{H}}_2\mathrm{O},{\mathrm{Cl}}_2,{\mathrm{CO}}_2,{\mathrm{CaSO}}_4.2{\mathrm{H}}_2\mathrm{O},2{\mathrm{CaSO}}_4.{\mathrm{H}}_2\mathrm{O},{\mathrm{CaOCl}}_2$                                            Which four substances are utilised in the production of washing soda?

Consider the following substances:                                               $\mathrm{NaCl}, \mathrm{Ca}{\left(\mathrm{OH}\right)}_2, {\mathrm{NaHCO}}_3, {\mathrm{NH}}_3, {\mathrm{Na}}_2{\mathrm{CO}}_3, {\mathrm{H}}_2\mathrm{O}, {\mathrm{Cl}}_2, {\mathrm{CO}}_2, {\mathrm{CaSO}}_4.2{\mathrm{H}}_2\mathrm{O}, 2{\mathrm{CaSO}}_4.{\mathrm{H}}_2\mathrm{O}, {\mathrm{CaOCl}}_2$

Which compound represents Plaster of Paris?

Consider the following substances:                                               $\mathrm{NaCl}, \mathrm{Ca}{\left(\mathrm{OH}\right)}_2, {\mathrm{NaHCO}}_3, {\mathrm{NH}}_3, {\mathrm{Na}}_2{\mathrm{CO}}_3, {\mathrm{H}}_2\mathrm{O}, {\mathrm{Cl}}_2, {\mathrm{CO}}_2, {\mathrm{CaSO}}_4.2{\mathrm{H}}_2\mathrm{O}, 2{\mathrm{CaSO}}_4.{\mathrm{H}}_2\mathrm{O}, {\mathrm{CaOCl}}_2$ 

Which compound is a part of baking powder?

Consider the following substances:                                                                $\mathrm{NaCl}, \mathrm{Ca}{\left(\mathrm{OH}\right)}_2, {\mathrm{NaHCO}}_3, {\mathrm{NH}}_3, {\mathrm{Na}}_2{\mathrm{CO}}_3, {\mathrm{H}}_2\mathrm{O}, {\mathrm{Cl}}_2, {\mathrm{CO}}_2, {\mathrm{CaSO}}_4.2{\mathrm{H}}_2\mathrm{O}, 2{\mathrm{CaSO}}_4.{\mathrm{H}}_2\mathrm{O}, {\mathrm{CaOCl}}_2$

Which compound is used as an antacid?

Consider the following salts:                                                                                                                                                ${\mathrm{Na}}_2{\mathrm{CO}}_3, \mathrm{NaCl}, {\mathrm{NH}}_4\mathrm{Cl}, {\mathrm{CH}}_3\mathrm{COONa}, {\mathrm{K}}_2{\mathrm{SO}}_4, {\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4$ 

Which of these salts will give neutral solutions?

Consider the following salts:                                                                                                                                         ${\mathrm{Na}}_2{\mathrm{CO}}_3, \mathrm{NaCl}, {\mathrm{NH}}_4\mathrm{Cl}, {\mathrm{CH}}_3\mathrm{COONa}, {\mathrm{K}}_2{\mathrm{SO}}_4, {\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4$

Which of these salts will give basic solutions (or alkaline solutions)?

How many molecules of water of crystallisation (per formula unit) are present in washing soda?

How many molecules of water of crystallisation (per formula unit) are present in gypsum?