Question

Rohan suggested to his Principal not to use yellow color on school buses. He read an article in newspaper “Sudden decline in IQ levels of children and unexplained retardation among the newspaper that "Sudden decline them can now be traced to unacceptably hign levels of lead in their blood sugar level. The health hazard has been to high levels of lead in domestic paints used on the wall of schools, traced residences, school buses, swings in play ground and toys”.

A) What is meant by IQ? State a cause of decline of IQ in children.

B) Which compound of lead is used in the yellow paint of school buses?

C) What are the values possessed by Rohan who wants to use lead free paints on vehicles?

Answer 1

Answer:

A) Meaning of IQ is Intelligence Quotient .

.The cause of decline of IQ level is due to unacceptable high level of lead in their blood sugar level.

B) chromate is the compound of lead.

C) The value possed by Rohan who want lead free paints on vechile are that the health hazard has been to high levels of lead in domestic paints used on the walls of school,school buses ,swing in playground and toys etc.

Answer 2

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• a) IQ is the intelligence quotient, which is a score that determines the intelligence of a person. The decline in the IQ is due to exposure to the lead in the yellow coloured oil paints.

• b) Lead(II) chromate (PbCrO4) is used in yellow paint of school buses.

• c) Values possessed by Rohan are courage to express your views, caring about the welfare of the society, and gaining knowledge.