Question 1 :
Which of the following methods is adopted for preparing dilute solution of ${ H }_{ 2 }S{ O }_{ 4 }$?
Question 2 :
Effervescence is seen when a bottle of soda water is opened.
Question 3 :
Four solutions A, B, C and D when tested with universal indicator showed pH as $4, 11, 7$ and $9$ respectively. Which one of the four solutions is neutral?<br/>
Question 4 :
Assertion: pH of a neutral solution is always $7$.
Reason: pH of a solution does not depend upon temperature.
Question 6 :
Which colour appears when few drops of phenolphthalein put into test tube contains lime water?
Question 7 :
Aquaregia is prepared by mixing conc. $HCl$ and $conc. HNO_3$ in the ratio ________ 
Question 9 :
If $H^{+}$ion concentration of a solution is increasedby $10$ times, its $pH$ will :<br>
Question 10 :
Statement I: A basic solution has more hydrogen ions than an acidic solution.<br/>Statement II: pH is defined as the -log $[H^+]$.<br/>
Question 12 :
Which part of tooth, made up of calcium phosphate, is the hardest substance in the body?
Question 14 :
Four solutions A, B, C and D when tested with universal indicator showed pH as $4, 11, 7$ and $9$ respectively. Which one of the four solutions is neutral?<br/>
Question 15 :
The solution of bleaching powder in water is always a clear solution.<br/>
Question 17 :
The acid present in the body of red ant is ________.<br/>
Question 21 :
Water of crystallization is the fixed number of water molecules chemically attached to a unit of a salt in its crystalline form.<br/>
Question 22 :
If tartaric acid is not added in baking powder, the cake will taste bitter due to te presence of -
Question 30 :
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?