Question 1 :
Calamine can be used to treat ant’s sting. True or False?
Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb4af59b460d7261ec16.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 A? Nature of solution A is neutral.
Question 8 :
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 9 :
<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 10 :
On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution?
Question 13 :
Common salt dissolved in water turns blue litmus red. True or False?
Question 14 :
What is used to test whether a substance is acidic or basic?
Question 15 :
<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 16 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb46f59b460d7261ec11.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 red litmus paper in test tube B?
Question 17 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb47f59b460d7261ec12.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 red litmus paper in test tube C?
Question 19 :
What is responsible for increase in temperature during a neutralisation reaction?
Question 20 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb46f59b460d7261ec10.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 red litmus paper in test tube A?