SELECT * FROM question_mgmt as q WHERE id=1242 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=9 AND chapterId=42 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 11th chemistry Some Basic Concepts of Chemistry convert the following into basic units nbsp

Question:

Convert the following into basic units:

 

(i) 28.7 pm

 

(ii) 15.15 pm

 

(iii) 25365 mg

Answer:

(i) 28.7 pm:

 

1 pm = 10–12 m

 

28.7 pm = 28.7 × 10–12 m

 

= 2.87 × 10–11 m

 

(ii) 15.15 pm:

 

1 pm = 10–12 m

 

15.15 pm = 15.15 × 10–12 m

 

= 1.515 × 10–12 m

 

(iii) 25365 mg:

 

1 mg = 0.01 kg

 

Therefore 25365 mg = 0.01/1 x 25365= 253.65 kg

 


SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='2' AND subId='9' AND ex_no!=0 AND status=1 and id!=1242 ORDER BY views desc, last_viewed_on desc limit 0,10
SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='2' AND subId='9' AND ex_no!=0 AND status=1 and id!=1242 ORDER BY last_viewed_on desc limit 0,10

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