Question

Which metal gives hydrogen with all of the following water, acids, and alkalis?
A) \[{\text{Fe}}\]
B) \[{\text{Zn}}\]
C) \[{\text{Mg}}\]
D) \[{\text{Pb}}\]

Answer 1

Hint: We have to remember that in chemistry, periodic tables play a vital role. In the periodic table there are totally \[118\] elements. In the periodic table there are totally \[18\] columns and \[7\] rows. The columns are called groups. Hence, \[18\] groups in the periodic table. The rows are called periods. Hence, totally \[7\] period in the table.

Complete answer:
The given list of metal are below,
The symbol of iron is \[{\text{Fe}}\].
The symbol of zinc is \[{\text{Zn}}\].
The symbol of magnesium is \[{\text{Mg}}\].
The symbol of lead is \[{\text{Pb}}\].
Zinc is the only metal in the given list that gives hydrogen with all of the following water, acids, and alkalis.
The reaction is given below,
\[{\text{Zn + water}} \to {{\text{H}}_{\text{2}}}\]
\[{\text{Zn + acids}} \to {{\text{H}}_{\text{2}}}\]
\[{\text{Zn + alkalis}} \to {{\text{H}}_{\text{2}}}\]
Hence,
\[{\text{Zn}}\] metal gives hydrogen with all of the following water, acids, and alkalis?

Hence, option B is the correct answer.

Note:
We also need to know that the atomic number of the atom depends on the number of protons or the number of electrons. The atomic number of the atom is equal to the number of protons or the number of the electrons. The mass number of the atom depends on the number of protons and the number of neutrons. The mass number of the atom is equal to the sum of the number of protons and the number of neutrons in the atom. Each element in the periodic table has a certain group and period. In that case iron is one of the elements in the period. The atomic number of iron is \[26\] and the symbol is \[{\text{Fe}}\]. The mass number of the iron is \[55.845\]. The atomic number of magnesium is \[12\]. It is one of the alkaline earth metals in the periodic table. It is present in the third period and second group in the periodic table. The symbol of magnesium is \[{\text{Mg}}\].