Question

13. Which of the following can undergo a chemical reaction?
(a) MgSO4 + Fe
(b) ZnSO2 + Fe
(c) MgSO2 + Pb
(d) CuSO2 + Fe
14. The atomic number of an element X is 19. The number of electrons in its ion X* will be
(a) 18
(b) 19
(c) 20
(d) 21
15.The atomic number of an element Y is 17. The number of electrons in its ion Y will be:
(a) 17
(b) 18
(C) 19
(d) 20​

Answer 1

Answer:

question 1 : option d is correct answer

question 2: option a is the correct answer

question 3 : option b is the correct answer