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What is the molecular weight of tri chloro ethylene?

(a) 131.5

(b) 130.5

(c) 129.5

(d) 120.5

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The correct option is (a) 131.5

The explanation is: Molecular formula of tri chloro ethylene is ClHC=CCl2. As it contains 3 chlorine atoms, 2 carbon atoms, and 1 hydrogen atom the molecular weight is 35.5*3+12*2+1*1=131.5.

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