Addition of charcoal to the filter bed of sand during water treatment for township supply is to?
prevent goiter
prevent tooth decay
remove odour
kill germs
Correct answer is C
Activated Carbon filters are excellent at removing chlorine and related poor taste and odor.
cu\(^{2+}\)
sn\(^{2+}\)
fe\(^{2+}\)
zn\(^{2+}\)
Correct answer is A
The arrangement of elements in order of increasing electrode potential values is called electrochemical series.
K > Na > Ca > Mg > Al > Zn > Fe > Ni > Sn > Pb > H > Cu > Ag > Au.
A chemical widely used as a fertilizer is?
galena
bauxite
emerald
nitrochalk
Correct answer is D
Calcium ammonium nitrate or CAN, also known as nitro-limestone or nitrochalk, is a widely used inorganic fertilizer.
Addition of sodium chloride to water to form a solution would lead to?
increase in freezing point and increase the boiling point
increase in freezing point and decrease the boiling point
decrease in freezing point and decrease the boiling point
decrease in freezing point and increase the boiling point
Correct answer is D
If you add salt to water, you lower its freezing point as well as raise its boiling point.
C\(_2\)H\(_5\)OH
C\(_3\)H\(_4\)
C\(_6\)H\(_6\)
CH\(_3\)COOH
Correct answer is D
Carboxylic acids and enols react with sodium bicarbonate to liberate carbon dioxide.
E,g CH\(_3\)COOH