This is with reference to question of Term1 Science Question paper- Set 4 ( Series JSK/1, Question paper code- 031/1/1/4, conducted on 2nd Dec 2021.
The following question was wrong/ unclear:
Section A, Question no 10, diagram based Question regarding the result of the reaction (gas evolution) when "SOME" amount of Sodium Hydroxide is used for the reaction.
Answer for this question contained options when this question is understood as "SAME" amount of Sodium Hydroxide used also. which means Question is not clear and is AMBIGUOUS. The answer here will depend on exactly how much Sodium Hydroxide is added, to decide whether less or same hydrogen gas is evolved.
The correct option as per the question would be -
a-Same amount of Hydrogen evolved
but many answer keys state it as -
c- Less amount of Hydrogen evolved,
as they have taken the question as - SAME amount of Sodium Hydroxide used for the reaction.
Strongly urge CBSE to look into this and make sure that the students are not penalised for the ambiguity in the question. Thank You.
Ans are 3, a, , b, d
Either this must be in grace or marks must be given