Question 1 :
Name a natural indicator which gives pink colour in basic solution.

Question 5 :
The correct way of making a solution of acid in water is to ___.

Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb4ff59b460d7261ec19.PNG' /> The above figure shows solutions taken in test tubes A,B,C and D. What colour is expected when a piece of red litmus paper is dropped in test tube D? Nature of solution D is neutral.

Question 8 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb49f59b460d7261ec14.jpg' /> The above figure shows three test tubes A,B and C with different liquids. What will you observe when you put a few drops of phenolphthalein solution to test tube C?

Question 9 :
Paheli is suffering from indigestion due to acidity. Is it advisable to give her orange juice in this situation and why?

Question 10 :
When an acidic solution is mixed with a basic solution, they ___ each other forming ___ and water.

Question 13 :
What is responsible for increase in temperature during a neutralisation reaction?

Question 14 :
What is used to test whether a substance is acidic or basic?

Question 15 :
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?

Question 17 :
Name the solution which does not change the colour of either red or blue litmus.

Question 18 :
Look at the given reaction. $Hydrochloric acid + Sodium hydroxide (base) \rightarrow Sodium chloride (salt) + Water$. Sodium chloride formed in this reaction remains in solution form. Can we get solid sodium chloride from this solution? Suggest a method (if any).

Question 19 :
Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed?