Group 1 Elements

Q.

With respect to the electrolysis of lead bromide, answer the following questions:
(i) Why is the lead bromide maintained in a molten state?
(ii) Why is the electrolytic cell made of silica?
(iii) Name the ions present in the electrolyte.
(iv) State what you observe at the (a) cathode (b) anode.
(v) Summarize the electrode reactions.

Q. Which one of the following electrolytes is used in Down's process of extracting sodium metal?

1. $NaCl+KCl+KF$
2. $N{a}_{2}C{O}_3$
3. $NaOH$
4. $NaHC{O}_3$

Q. Which of the following does not belong to Group IA ?

1. Li
2. Mg
3. K
4. Rb

Q. The first three elements of Group I have the following atomic structures
a) Lithium : 3 protons , 4 neutrons; 2, 1 electrons
b) Sodium : 11 protons, 12 neutrons ; 2, 8, 1 electrons
c) Potassium : 19 protons, 20 neutrons; 2, 8, 8, 1 electrons
Which of the following features causes them to have similar properties ?