SELECT * FROM question_mgmt as q WHERE id=5978 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=11 AND subId=16 AND chapterId=465 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 7th science Acids, Bases and Salts state differences between acids and bases

Question:

State differences between acids and bases.

Answer:

 

                         Bases                          Acids
1. These are proton acceptors/ electron pair donors. 1. These are proton donor/ electron pair acceptor.
2. Bases indicates green colour with China Rose indicator.  2. Acids indicates dark pink colour with China Rose indicator.  
3. It have pH value > 7. 3. These have pH value < 7.
4. It turn red litmus paper into blue. 4. It turns blue litmus paper into red.

5. It taste bitter.

6. Bases changes into red colour whith turmeric indicator.

5. It tastes sour.

6. Acids do not change colour with turmeric indicators.

6. Example: Sodium hydroxide (NaOH) 6. Example: Hydrochloric acid (HCl)

 


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SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='11' AND subId='16' AND ex_no!=0 AND status=1 and id!=5978 ORDER BY last_viewed_on desc limit 0,10

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  • Answered by Ekta Mehta
  • 4 months ago

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