QUIZ 7 sec 3

Sulphuric acid is acting as ……….. agent when reaction with NaBr salt and as …….. agent when reacting with iron filings.

• Oxidizing – oxidizing

• Reducing – reducing

• Oxidizing – reducing

• Reducing – oxidizing

To reduce smell of hydrogen chloride gas a rod wet ….. is used.

• Caustic soda

• Sodium sulphate

• ammonia solution

• Potassium chloride

Scientific idea that used in detection for anions is used to detect some anions. Which anions detection depends on this scientific idea.

• Both carbonate & bicarbonate

• Both chloride & bromide

• Both sulphate & phosphate

• Both nitrite & nitrate

Detecting acidic radical of simple salts is depending on acidic effect at …

• Salt solution

• Molten salt

• Molten pure salt

• Solid salt itself

4. Which of the following is a precipitating agent?

• Sodium sulphate

• Ammonium hydroxide

• Ammonium chloride

• copper sulphate

organic compound is being estimated qualtitively in the form of ……

• anions only

• cations only

• the whole compound

• acid radicals only

Ozone gas reacts with potassium iodide solution forming three different products ….. Which of the produced substances turns a paper wetted with starch solution into blue?

• Oxygen

• iodine

• potassium hydroxide

• Hydrogen Iodide

Dilute sulphuric acid reacts with each of barium hydroxide solution and barium chloride solution .. What is the similarity between these reactions?

• A gas evolves from both reactions

• A water insoluble salt is formed from both reactions

• the solution produced from both reactions has pH value equal 7

• Both reactions produce water

one of the following anions by detecting it in a confirmatory test, color of the indicator is removed it is ……

• anions of iodide and phosphate

• anions of thiosulphate and sulphate

• anions of thiosulphate and nitrite

• anions of carbonate and iodide

Magnesium sulphate solution distinguishes between …… anions

• Sulphide and chloride

• Carbonate and nitrite

• Chloride and bromide

• Carbonate and bicarbonate