Give a test that can be used to confirm the presence of carbon in a compound. With a valency of 4, how is carbon able to attain noble gas configuration in its compounds?
OR
The number of carbon compounds is more than those formed by all other elements put together. Justify the statement by giving two reasons.
The test to confirm the presence of carbon
- Burn compound in air/ oxygen; Gas (CO2) evolved turns lime water milky.
Carbon has four electrons in its valence shell orbital. So, it can neither accept nor gain four electrons. One way to complete an octet is by sharing electrons. So, carbon forms a covalent bond to complete its octet.By sharing its four valence electrons with other elements.
Covalent bond formation in carbon :
A carbon atom can form bonds with other carbon atoms or with the atoms of other elements by sharing of electrons. This type of bond is called as covalent bond. Carbon often forms bonds with hydrogen. Compounds that contain only carbon and hydrogen are called hydrocarbons. For example: MethaneCovalent bond frmation in carbon
OR
The number of carbon compounds is more than those formed by all other elements put together:
● Due to self linking ability of carbon/catenation
● Since carbon has a valency of four it can form bonds with four other atoms of carbon or atoms of some other mono-valent element.
● Due to small size of carbon it forms very strong and (or) stable bonds with other elements
(Any two)
Couldn't generate an explanation.
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