Mendeleev's Periodic Table

Q.

Eka silicon predicted by Mendeleev is which element:

1. Gallium

2. Sodium

3. Germanium

4. Aluminium

Q.

Eka aluminium predicted by Mendeleev is which element?

1. Magnesium

2. Germanium

3. Sodium

4. Gallium

Q. Eka-aluminium and Eka-silicon are respectively known as?

1. Gallium and germanium
2. Iron and sulphur
3. Aluminium and silicon
4. Carbon and nitrogen

Q.

Which important property did Mendeleev use to classify the elements in his periodic table and did he stick to that?

Q. What is/are the drawback(s) of Mendeleev's periodic table?

1. Placing of $H$ was not decided
2. Gaps for new elements were left
3. Position of isotopes were not defined
4. Both (a) and (c)

Q. Which important property did Mendeleev use to classify the elements in his Periodic Table, and did he stick to that?

Q.

Mendeleev predicted the existence of which element/elements in the periodic table?

1. Germanium and Gold

2. Gallium and germanium

3. Sodium and germanium

4. Gallium