Which of the following factors help to measure quallity of water ?
Which of the following factors help to measure quallity of water ?
A. DO
B. BOD
C. COD
D. all of the above
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The anhydride of HCIO4 is_________________?
The anhydride of HCIO4 is_________________?A. Cl2O
B. Cl2O6
C. ClO2
D. Cl2O7Which of the following is macronutrient ?
Which of the following is macronutrient ?A. Cu
B. Cl
C. H
D. ZnThe strength of solution of an element whose electrode potential is to be measured is________________?
The strength of solution of an element whose electrode potential is to be measured is________________?A. 2M
B. 1N
C. 1m
D. 1MThe atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?
The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?A. 7
B. 10
C. 12
D. 16Ammonia may be prepared by heating ammonium chloride with_______________?
Ammonia may be prepared by heating ammonium chloride with_______________?A. Water
B. NaCl
C. Aqueous sodium hydroxide
D. H2SO4Bromine can be liberated from KBr solution by the action of _______________?
Bromine can be liberated from KBr solution by the action of _______________?A. Iodine solution
B. Chlorine
C. NaCl
D. Ki