EASY
RRB ALP CBT 1
IMPORTANT
Earn 100

Thickness of the Ozone layer is measured in _____.
(a)Db (decibel)
(b)DU (Dobson Unit)
(c)PPB
(d)PPM

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Important Questions on Practice Set
EASY
RRB ALP CBT 1
IMPORTANT

EASY
RRB ALP CBT 1
IMPORTANT

HARD
RRB ALP CBT 1
IMPORTANT

EASY
RRB ALP CBT 1
IMPORTANT

EASY
RRB ALP CBT 1
IMPORTANT

MEDIUM
RRB ALP CBT 1
IMPORTANT

EASY
RRB ALP CBT 1
IMPORTANT

EASY
RRB ALP CBT 1
IMPORTANT
