Sarthaks Test
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Some white colourless crystals are heated. A cracking sound is heard and brown fumes are given off and the residue left is yellow-brown in colour. When a glowing splinter is held in the fumes, it is relighted. The fumes consist of : 

(A) O

(B) NO

(C) Cl

(D) NO2 and O2

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(D) NO2 and O2

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