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O3 layer
O4 layer
SO2 layer
CO2 layer
Synthetic detergents are made from
Table salt gets moist during rainy season as
Tear gas used by the police to disperse the mob contains
Temporary hardness is due to the presence of
Terylene is a condensation polymer of ethylene glycol and which acid?
Tetra ethyle lead (TEL) is
The α particles are
The 1st organic compound synthesised in the laboratory was
The absolute value of charge on electron was determined by
The acid rain destroys vegetations because it contains