SELECT * FROM question_mgmt as q WHERE id=3491 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=252 and ex_no='4' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Chemical reaction and Equation which of the statements about the reaction below a

Question:

Which of the statements about the reaction below are incorrect?

2PbO(s) + C(s) → 2Pb(s) + CO2(g)

(a) Lead is getting reduced.
(b) Carbon dioxide is getting oxidised.
(c) Carbon is getting oxidised.
(d) Lead oxide is getting reduced.

       (i) (a) and (b)
       (ii) (a) and (c)
       (iii) (a), (b) and c
       (iv) all

 

Answer:

Explanation:

(a) Lead is getting reduced is incorrect as lead oxide is getting reduced.

(b) Carbon dioxide is getting oxidised is incorrect answer as carbon is getting oxidised.

(c) Carbon is getting oxidised is correct answer.

(d) Lead oxide is getting reduced is correct answer.


SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='9' AND subId='16' AND ex_no!=0 AND status=1 and id!=3491 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='9' AND subId='16' AND ex_no!=0 AND status=1 and id!=3491 ORDER BY last_viewed_on desc limit 0,10

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