Chemistry virtual lab Team 4

Chemical added to remove oxides of nitrogen in copper solution in estimation of copper:

• NH₄OH

• CH₃COOH

• N₂H₄CO(NH₂CONH₂₎

• KI

The ion which is not responsible for causing hardness of water:

• Divalent zinc cation

• Chloride ion

• Magnesium cation

• Potassium cation

Which of the following is used as indicator in estimation of total hardness of water?

• EDTA

• EBT

• FERROIN

• FAS

The solution after adding NH₄OH in estimation of copper from brass is:

• Pale blue solution

• Light yellow solution

• Pale blue ppt

• White ppt

NH₃NH₄Cl is _____ in estimation of hardness of water:

• Indicator

• Buffer solution

• Titrant

• Reagent

The titration method followed in copper estimation is:

• Redox titration

• Acid base titration

• Precipitation titration

• Complexometric titration

K₂Cr₂O₇ in acidic medium acts as:

• Oxidising agent

• Reducing agent

• Both a and b

• None

Full form of EBT:

Solution which maintains constant ph:

Expansion of EDTA ligand is: (Take care of spaces)