Question

Assertion- Carbon forms covalent compounds whereas lead form ionic compounds
Reason- Carbons can also lose electrons to form C4+ while lead cannot.
(A) Both assertion and reason are correct and reason is the correct explanation of assertion
(B) Both assertion and reason are correct but reason is not the correct explanation of assertion
(C) Assertion is correct but the reason is incorrect
(D) Both assertion and reason are incorrect

Answer 1

Hint :Covalent compounds are chemical compounds made of elements that are connected by covalent bonds. Only nonmetallic elements can form Covalent bonds because elements of these compounds have the same or similar electronegativity values. Ionic compounds are made up of cations and anions. If a compound is made from a metal and a nonmetal, its bonding will be ionic.

Complete Step By Step Answer:
Carbon is a covalent compound.it is a nonmetal. It forms a bond which is called a covalent bond. Covalent bonds are bonds formed by sharing of electrons. Carbon can form covalent bonds with itself as well as other atoms. Whereas lead is a heavy metal. It forms ionic bonds with other elements and so it is an ionic compound as it takes electrons for forming bonds.
Hence assertion is true
The valency of carbon is 4. For forming bonds it has to satisfy tetravalency. It forms bonds by sharing electrons with other atoms. So it has to form 4 covalent bonds either with its atom or atoms of other elements. Carbon cannot lose or gain electrons to form free ions so it cannot lose 4 electrons to form \[{C^{4 + }}\]ions as very high energy is required to remove 4 electrons. Whereas lead can form metallic ions by losing electrons.
Hence reason is wrong
Therefore the correct option is C. Assertion is correct but the reason is incorrect.

Note :
All covalent compounds cannot lose or gain electrons to form free ions either positive or negative. But in the case of ionic compounds, it is different. In ionic compounds, there is a complete transfer of electrons to form a bond so they can easily lose or gain electrons to exist as free ions.