Question 2 :
What is responsible for increase in temperature during a neutralisation reaction?

Question 5 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb43f59b460d7261ec0d.jpg' /> The above figure shows three test tubes A,B and C with different liquids. What will you observe when you put a piece of blue litmus paper in test tube A?

Question 6 :
Paheli is suffering from indigestion due to acidity. Is it advisable to give her orange juice in this situation and why?

Question 7 :
<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 8 :
Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are ___.

Question 9 :
‘Litmus’, a natural dye is an extract of which of the following?

Question 12 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb49f59b460d7261ec15.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 B?

Question 13 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb45f59b460d7261ec0f.jpg' /> The above figure shows three test tubes A,B and C with different liquids. What will you observe when you put a piece of blue litmus paper in test tube C?

Question 14 :
A compound if acidic will turn all indicators red. True or False?

Question 17 :
Calamine can be used to treat ant’s sting. True or False?

Question 20 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb4ef59b460d7261ec18.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 B? Nature of solution B is basic.