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NEET UG Principles Related to Practical Chemistry — practice questions

Explore 97 free Principles Related to Practical Chemistry questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Principles Related to Practical Chemistry questions and exercises with answers

Showing questions 1–30 of 97.

A salt gives an odourless gas with dilute H2SO4 that turns lime water milky. Which gas is it?Read the answer and worked solution →Warm dilute H2SO4 on a salt releases a gas smelling of rotten eggs. Which anion is present?Read the answer and worked solution →Lead acetate paper turns black when exposed to H2S gas. Which compound forms?Read the answer and worked solution →Milky lime water turns clear again when excess CO2 is passed. Which compound causes this?Read the answer and worked solution →What colour does SO2 gas give to paper soaked in acidified potassium dichromate?Read the answer and worked solution →CO2 and SO2 both turn lime water milky. Which property tells SO2 apart?Read the answer and worked solution →A purple colour with sodium nitroprusside in alkaline solution confirms which anion?Read the answer and worked solution →What is the purple complex formed in the sodium nitroprusside test for sulphide?Read the answer and worked solution →A solid salt warmed with dilute H2SO4 gives reddish brown NO2 fumes. Which anion is present?Read the answer and worked solution →A red colour with sulphanilic acid and 1-naphthylamine reagent confirms which ion?Read the answer and worked solution →In the Griess-Ilosvay test for nitrite, what produces the red colour?Read the answer and worked solution →A salt smells of vinegar when treated with dilute H2SO4. Which anion does this suggest?Read the answer and worked solution →An acetate heated with ethanol and conc. H2SO4 gives a fruity odour. Which compound causes it?Read the answer and worked solution →Which extract is used for wet anion tests when the salt is insoluble in water?Read the answer and worked solution →Why is sodium carbonate extract unsuitable for testing carbonate?Read the answer and worked solution →Conc. H2SO4 on a salt gives a pungent gas forming dense white fumes with ammonia. Which anion?Read the answer and worked solution →Silver nitrate gives a curdy white precipitate with chloride. This precipitate dissolves in:Read the answer and worked solution →In the chromyl chloride test, what is the yellow precipitate formed with lead acetate?Read the answer and worked solution →In the chromyl chloride test, the amyl alcohol layer turns blue because of:Read the answer and worked solution →In the chromyl chloride test, the evolved gas is passed into which solution, turning it yellow?Read the answer and worked solution →Chlorine water and CCl4 added to a salt solution give an orange brown organic layer. Which ion?Read the answer and worked solution →In the layer test with chlorine water, a violet organic layer confirms which ion?Read the answer and worked solution →Which silver halide is a yellow precipitate insoluble in excess ammonium hydroxide?Read the answer and worked solution →Which silver halide is pale yellow and dissolves in ammonium hydroxide only with difficulty?Read the answer and worked solution →Heating a salt with conc. H2SO4 gives violet vapours and a violet sublimate. Which anion?Read the answer and worked solution →Brown fumes thicken when a salt is heated with copper turnings and conc. H2SO4. Which anion?Read the answer and worked solution →With conc. H2SO4, which pair of gases evolved indicates an oxalate?Read the answer and worked solution →Calcium chloride added to an acidified oxalate solution gives a white precipitate of:Read the answer and worked solution →BaCl2 gives a white precipitate insoluble in conc. HCl. Which compound is it?Read the answer and worked solution →Lead acetate added to a sulphate solution acidified with acetic acid gives:Read the answer and worked solution →

Worked practice questions

A salt gives an odourless gas with dilute H2SO4 that turns lime water milky. Which gas is it?

  1. Sulphur dioxide
  2. Carbon dioxide
  3. Nitrogen dioxide
  4. Hydrogen sulphide
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Correct answer: B. Carbon dioxide

Carbon dioxide is odourless and forms insoluble calcium carbonate with lime water, causing the milkiness.

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Warm dilute H2SO4 on a salt releases a gas smelling of rotten eggs. Which anion is present?

  1. Nitrite
  2. Sulphide
  3. Sulphite
  4. Carbonate
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Correct answer: B. Sulphide

Sulphides react with warm dilute sulphuric acid to release hydrogen sulphide, which smells like rotten eggs.

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Lead acetate paper turns black when exposed to H2S gas. Which compound forms?

  1. Lead oxide
  2. Lead sulphate
  3. Lead sulphide
  4. Lead chloride
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Correct answer: C. Lead sulphide

Hydrogen sulphide reacts with lead acetate to form lead sulphide, a black solid.

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More Chemistry topics

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