subject chemistry pls answer
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a-LPG And CNG
b-paracetamol and pan-D
c-Nerve gas, tear gas and pepper spray
d-sodium nitrite,sodium benzoate
2The intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.
3 The branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.
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