Question 1 :
The acid present in the body of red ant is ________.<br/>

Question 3 :
When an acid reacts with the metal carbonate will form bubbles giving off carbon dioxide gas&#160;and the other products namely :<br/>

Question 6 :
Since there are $10$ water molecules in washing soda, hence it is known as:

Question 7 :
<span>When&#160;pH of rain water is less than 5.6, it is called:</span>

Question 8 :
Sodium carbonate is a basic salt because it is a salt of:<br/>

Question 15 :
Barium hydroxide is an alkali. It reacts with hydrochloric acid. How does the pH of the hydrochloric acid change as an excess of aqueous barium hydroxide is added?

Question 18 :
Sodium hydrogen carbonate when added to acetic acid evolves a gas.&#160;Which of the following statements are true about the gas evolved?<br/>(i) It turns lime water milky.<br/>(ii) It extinguishes a burning splinter.<br/>(iii) It dissolves in a solution of sodium hydroxide.<br/>(iv) It has a pungent odour.<br/>

Question 20 :
When few drops of dil. $HCl$ are added to a small amount of red copper oxide, the colour of the solution becomes:<br/><span class="_wysihtml5-temp"></span>

Question 22 :
Turmeric is a natural indicator. On adding its paste to acid and base separately, which colour would be observed ?

Question 25 :
An indicator $InH$ has ${K_{In}}$ value of ${10^{ - 7}}$, it may exist in its molecular and ionic state in approximately $1:1$ ratio in which substance:

Question 26 :
The reaction of aluminum atoms displacing hydrogen&#160;ions from sulphuric acid can be represented as: