In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.
Assertion (A): The empirical mass of ethene is half of its molecular mass.
Reason (R): The empirical formula represents the simplest whole number ratio of various atoms present in a compound.
(i) Both A and R are true and R is the correct explanation of A.
(ii) A is true but R is false.
(iii) A is false but R is true.
(iv) Both A and R are false
In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.
Assertion (A): The empirical mass of ethene is half of its molecular mass.
Reason (R): The empirical formula represents the simplest whole number ratio of various atoms present in a compound.
(i) Both A and R are true and R is the correct explanation of A.
(ii) A is true but R is false.
(iii) A is false but R is true.
(iv) Both A and R are false
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1 Answer
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This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
(i) Both A and R are true and R is the correct explanation of A.
Explanation: The molecular formula gives the actual number of different atoms present in a molecule and the empirical formula gives a simple whole number ratio of different atoms present in a molecule.
Since ethene C2H4 can be further simplified, the empirical formula becomes CH2. The molecular mass of C2H4 is 28 g/mol and the empirical mass of CH2 is 14 g/mol.
Hence, the empirical mass of ethene is half of its molecular mass.
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