Subject :NSO Class : Class 7
Following are some characteristics of a chemical reactions.
(i) A sound is produced during a chemical reaction.
(ii) New products are formed.
(iii) No smell is given off.
(iv) Heat or light may be given off.
Which of the above statements are correct?
A(i), (ii) and (iv)
B(i) , (ii) and (iii)
C(ii) and (iv)
D(iii) and (iv)
Is it 'A sound MAY BE produced during a chemical reaction' or 'A sound IS produced during a chemical reaction.' ?