Find the odd -
a-hydrogen, oxygen, nitrogen, neon
b- chalk, marble, water, toothpaste
c- CFC , acid rain , LPG , smoke
d- HCL , H2SO4, NAOH , HNO3
e- petrol , diesel, coal, CNG
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a) neon
b) water
c) lpg
d) NaoH
e) coal
b) water
c) lpg
d) NaoH
e) coal
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