Which has maximum oxidation number ?
Which has maximum oxidation number ?
A. N
B. Cr
C. S
D. Mn
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Petra means ______ ?
Petra means ______ ?A. Petrol
B. Sediment
C. Rock
D. FuelThe correct electronic configuration of Cr is____________________?
The correct electronic configuration of Cr is____________________?A. [Ar]4s23d4
B. [Ar] 4s23d4
C. [Ar]4s03d5
D. [Ar]4s13d5Ionization energy in a period generally ___________________?
Ionization energy in a period generally ___________________?A. Increases
B. Decreases
C. No change
D. Variable trendWhat is the mass of one mole of Iodine?
What is the mass of one mole of Iodine?A. 74g
B. 254g
C. 127g
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Which of the following is not primary pollutant__________________?A. SO3
B. CO
C. NO
D. H2SO4Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________?
Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________?A. 60%
B. 50%
C. 52%
D. 8%