Alkalinity

What is alkalinity?

• Ability to neutralize a base

• Presence of H⁺ ions

• Ability to neutralize an acid

• Presence of Ca²⁺ ions

Which ion is responsible for alkalinity?

• . Mg²⁺

• Ca²⁺

• Cl^-

• OH^-

Tags

NGSS.HS-ESS2-5

What are the indicators used in the estimation of alkalinity?

• EBT and starch

• Phenolphthalein and methyl orange

• Phenolphthalein and EBT

• methyl orange and starch

What is the permissible limit of total alkalinity in a drinking water as per BIS norms?

• 600 ppm

• 500 ppm

• 400 ppm

• 200 ppm

What is a standard solution?

• Unknown weight of the solution

• Its strength is already known

• Equivalent weight of the solution

• Mole fraction of the solution

Which of the following indicator gives pink colour in basic medium?

• Methyl orange

• Starch

• EBT

• Phenolphthalein

With respect to the constituents causing alkalinity in water, which of the following situation never arises?

• CO₃^2- and HCO₃^– together

• HCO₃^– and OH^– together

• OH^– only

• OH^– and CO₃^2- together

Tags

NGSS.HS-ESS2-5

What is the disadvantage of using high alkaline water?

• It may lead to infections

• It may lead to electrolysis

• It may lead to caustic embrittlement

• It may lead to indigestion

The alkalinity due to bicarbonate ion when P < 1/2 T will be

• T-2P

• 2(T-P)

• 0

• 2P-T

The alkalinity due to carbonate ion is 2P when

• P = T

• P > 1/2 T

• P = 1/2 T

• P <1/2 T