Question 31 MarkA stain of curry on a white cloth becomes reddish brown when soap is scrubbed on it.AnswerTrueView full question & answer→
Question 81 MarkBacteria present in the mouth produce base by degradation of food particles left in the mouth after eating.AnswerFalseView full question & answer→
Question 91 MarkAn aqueous solution of washing soda possesses acidic nature.AnswerFalseView full question & answer→
Question 101 MarkThe molecular formula of sodium zincate is $\mathrm{Na}_2 \mathrm{Zn}(\mathrm{OH})_4$.AnswerFalseView full question & answer→
Question 121 Mark$OH^-(aq)$ ions in the solution are responsible for chemical reaction of base.AnswerTrueView full question & answer→
Question 141 MarkSalts of strong acids and strong bases are neutral with $pH$ value $7.$AnswerTrueView full question & answer→
Question 151 MarkThe $p$ in $pH$ stands for ‘potenz’ in German.AnswerTrueView full question & answer→
Question 161 MarkDissolution of acids and bases in water is an endothermic reaction.AnswerFalseView full question & answer→
Question 171 MarkHydrogen ions are formed in $HCl$ in presence of water.AnswerTrueView full question & answer→
Question 181 MarkSolutions of glucose and alcohol do not conduct electricity.AnswerTrueView full question & answer→
Question 191 Mark$\mathrm{Cl}_2 \mathrm{O}_7$ is a basic oxide.AnswerFalseView full question & answer→
Question 201 Mark$\mathrm{Ca}\left(\mathrm{HCO}_3\right)_2$ is soluble in water.AnswerTrueView full question & answer→