Lakhmir Singh solutions for केमिस्ट्री [अंग्रेजी] कक्षा १० आईसीएसई chapter 13 - Practical Work [Latest edition]

State whether the following statement is True or False.

CO₂ gas has no effect on filter paper dipped in potassium dichromate solution.

State whether the following statement is True or False.

Colour of a salt containing ferrous ions is yellowish brown.

State whether the following statement is True or False.

Calcium burns with a brick red colour in direct flame.

State whether the following statement is True or False.

Copper gives a blue colour precipitate with excess of NH₄OH.

Lime water in the presence of SO₂ gas gives a white precipitate of ______.

Iron(III) with NaOH gives ______ colour precipitate.

AgNO₃ + HCl → ______ ↓ + ______

Which of the following gases have bleaching effect on a substance?

Which of the following is formed on adding excess of NaOH to a compound containing zinc?

A glass rod dipped in concentrated hydrochloric acid can be used to detect ______.

What is Nessler’s reagent?

How will you identify the presence of oxygen gas?

Name the gas that bleaches a substance. Give the reaction involved?

How will you carry out the flame test of potassium and what will you observe?

Why does the lime water turn milky when carbon dioxide is passed through it? Explain using chemical reactions.

How will you distinguish between ferric and ferrous ions?

State whether the following statement is True or False.

Acidified K₂Cr₂O₇ test comes positive for carbonate ion.

State whether the following statement is True or False.

Upon adding conc. HCl to manganese oxide, a brown-coloured solution is obtained.

State whether the following statement is True or False.

Phenolphthalein in basic solution turns pink.

Water vapours turn anhydrous cobalt chloride ______.

2Pb(NO₃)₂ \[\ce{->[\Delta]}\] ______ + ______ ↑ + O₂

On strongly heating copper nitrate, a ______ colour residue is obtained.

Colour of barium sulphate is ______.

Zinc carbonate on heating gives ______.

Brown ring test is used to identify ______.

What is a preliminary test?

How is a preliminary test carried out?

In what scenario would you carry out the brown ring test as a confirmatory test.

How will you differentiate between compounds containing sulphate and sulphite just by preliminary test?

Give two confirmatory tests for chloride ion.

How will you distinguish between an acid and a base using a chemical indicator?

True or False.

Sodium burns with a golden yellow colour in the direct flame.

True or False.

Lead and zinc cations do not give any precipitate with excess of NH₄OH solution.

True or False.

Zinc gives a white gelatinous precipitate with NaOH.

True or False.

Nessler's reagent, when added to an ammonium solution, turns brown.

True or False.

Chlorine gas can be identified using a glass rod dipped in ammonia solution.

True or False.

On strongly heating zinc nitrate, a yellowish-green gas is evolved, which turns moist blue litmus paper red.

Nitrogen dioxide turns ______ litmus to ______.

______ colour is imparted to the flame if copper ions are present in a compound.

A dirty ______ coloured precipitate is formed when a compound containing Fe²⁺ ion is treated with NaOН.

On passing H₂S gas through lead nitrate solution, ______ colour precipitate of ______ is formed.

______ \[\ce{->[\Delta]}\] 2ZnO + 4NO₂ + O₂

The residue obtained on heating zinc carbonate is ______ when hot and ______ when cooled down.

Which of the following is a greenish yellow gas with bleaching property?

Copper(II) carbonate when heated turns: 

Sulphur dioxide changes the colour of potassium permanganate to:

Which of the following gases has the smell of a rotten egg?

A compound on strongly heating evolves a reddish brown gas in the presence of which a burning splint reignites. The gas evolved may be:

Confirmatory test of ammonium ion is done by:

Fe(OH)₂ is insoluble in ______.

The gas evolved when manganese dioxide is treated with conc. HCl is ______.

How can you identify the presence of water vapours?

Name the gas which turns moist red litmus blue.

How will you distinguish between the gases oxygen and hydrogen?

What are the observations made in preliminary tests of carbonate?

What are the observations made in preliminary tests of nitrate?

Give two confirmatory tests for the identification of the sulphate ion.

How will you identify the HCl gas using silver nitrate solution? Give reactions involved.

What is starch iodide paper? What happens when chlorine gas is passed through it? Give the reaction involved.

Two gases are given in a test tube. One of them reignites a burning wooden splint and in the presence of the other, a burning splint goes off. Identify the two gases.

Give a systematic procedure to carry out the brown ring test in a laboratory.

How will you distinguish between zinc carbonate and zinc nitrate?

Give at least two tests to differentiate between the following gases.

CO₂ and SO₂

Give a chemical test to distinguish between the following gases:

Ammonia and hydrogen chloride

Give at least two tests to differentiate between the following gases.

SO₂ and H₂S

Two salts A and B, are given to you with the observations given in the table below. How will you proceed with the identification of the anions present in it? Write in a schematic way.

Give reasons for the following. Give the chemical equation wherever required.

The milkiness of lime water disappears on adding CO₂ in excess.

Give reasons for the following. Give the chemical equation wherever required.

Dense fumes are observed when ammonia comes in contact with HCl.

Give reasons for the following. Give the chemical equation wherever required.

A glowing splint reignites in the presence of the gas evolved on heating of lead nitrate.

Give reasons for the following. Give the chemical equations wherever required.

Blue precipitate obtained on adding NH₄OН to Cu²⁺ ion dissolves in excess of NH₄ОН.

Give reasons for the following. Give the chemical equations wherever required.

A brown ring is observed when a freshly prepared ferrous sulphate solution is added to a nitrate ion solution followed by conc. H₂SO₄.

Four salt solutions containing cations A, B, C and D were taken in different test tubes. Caustic soda was added to each one of them and the following observations were made:

Identify A, B, C and D.