Please answer the questions.

Dear student,

Q1
ANS-
Mendeleev periodic table, vertical columns in the periodic table and horizontal row in the periodic table were named as groups and period respectively.The periodic table is  of seven horizontal periods and is numbered between 1 to 7 and  eight vertical columns or groups. They are numbered between 1 to 8.
So,option a is correct.

Q2-
According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of increasing atomic masses.
Option d is correct.

Q3-
ANS- Germanium element found a place in the periodic table later.So option b is correct.

Q4-
Mendeleev named one of the element as eka-aluminium which was later discovered as Gallium.
Option a is correct.

Q5-
Option b is correct. Statement I and III are correct.

Hope it helps
​​​​​​Regards.