The non-metal A is an important constituent of our food and most of the fuels around us.

Hi, I have a question and I hope anyone could answer it:

The non-metal A is an important constituent of our food and most of the fuels around us. A forms two oxides B and C. The oxide B is poisonous whereas oxide C causes global warming.

(a) Identify A, B and C.

(b) To which group of periodic table does A belong?

(c) Name another element which is placed in the same group as A.

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2 Answers

1. Answer:

(a) Identification of A, B, and C

(1) A is Carbon(C). Carbon is an important constituent of our food as compounds of carbon are present in the food that we eat, the clothes that we wear etc.

(2) B is Carbon monoxide(CO).

• Carbon monoxide is a colourless and odourless gas that is produced by the incomplete combustion of materials containing carbon.
• Carbon monoxide poisoning can result in brain damage and even death as it has more affinity to combine with haemoglobin thanÂ OxygenÂ (O2)

(3) C is Carbon dioxideÂ (CO2).

• Carbon dioxide is a major contributor to global warming.
• Global warming: It is the gradual increase in the earthâ€™s temperature generally due to the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants.

(b) Group of element A in the periodic table

• Electronic configuration of Carbon =Â 1s22s22p2
• As the last electron enters in p-subshell, so carbon is a p-block element.
• For p-block elements, Group number= 12+ Number of electrons in p-subshell
• Therefore, Group number= 12+ 2= 14
• Hence, carbon belongs to Group 14.
2. (a) A is carbon (C), B is carbon monoxide (CO) andÂ  C is carbon dioxideÂ (CO2â€‹Â )
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(b) Carbon belongs to 14th groupÂ
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(C) Silicon (Si) which is placed in the carbon family (same group).