#2 Химия 100 сұрақ

Nitrite ion with ethacridine forms

• green colouring

• cherry red colouring

• red-purple colouring

• dark brown colouring

The nitrate ion is an anion

• hydrochloric acid

• rhodanic acid

• nitric acid

• all answers are correct

Reaction of nitrate ion with diphenylamine

• in a test tube

• on the slide

• on filter paper

• n the evaporation cup

The acetate ion is an anion

• acetic acid

• nitric acid

• rhodanic acid

• all answers are correct

The acetate ion reacts with iron chloride to form

• red-purple sludge

• green solution

• dark brown solution

• reddish-brown colouring

How cardiac remedies use derivatives

• nitric acid

• rhodanic acid

• hydrochloric acid

• all answers are correct

In angina pectoris, derivatives are used

• hydrochloric acid

• rhodanic acid

• all answers are correct

• nitric acid

The task of quantitative analysis is

• determination of the qualitative content of substances

• quantification of substances

• determination of pH value

• determination of melting point

Gravimetric analysis is based on determining

• substance volume

• pH values

• mass of matter

• melting point

Titrimetric analysis is based on determining

• reactant volume

• pH values

• mass of matter

• melting point