Classify the following species into acids and bases according to Lewis concept.
S^2-, H⁺, OH^-, BF₃' Ni²⁺, F^-

MnO₄^2- undergoes disproportionation reaction in acidic medium but MnO₄^- does not. Give reason.

Categorise the redox reactions that occur in our daily life

2Cu₂S + 3O₂ \(\longrightarrow\) 2Cu₂O + 2SO₂
(i) In this reaction which substance is getting oxidised and which substance is getting reduced?
(ii) Name the oxidising and reducing agents.

How would you know whether a redox reaction is taking place in an acidic, alkaline or neutral medium?

What is the most essential conditions that must be satisfied in a redox reaction?

Why is anode called oxidation electrode, whereas the cathode is called reduction electrode?

Zn rod is immersed in CuSO₄ solution. What will you observe after an hour? Explain you observation in terms of the redox reaction.

Nitric acid is an oxidising agent and reacts with PbO but it does not react with PbO₂ Explain why?

Which one of the two, ClO₂^- or ClO₄^- shows disproportionation reaction and why?

Consider the reactions,
(i) H₃PO_2(aq) + 4AgNO_3(aq)+ 2H₂O_(l) \(\longrightarrow\) H₃PO_4(aq)+ 4Ag_(s)+ 4HNO_3(aq)
(ii) H₃PO_2(aq) + 2CuSO_4(aq) + 2H₂O_(l) \(\longrightarrow\) H₃PO_4(aq)+ 2Cu_(s) + H₂SO_4(aq)
(iii) C₆H₅CHO_(l) + 2[Ag(NH₃)₂]⁺_(aq) + 3OH^-_(aq)  \(\longrightarrow\) C₆H₅COO^-(aq) + 2Ag(s)+ 4NH_3(aq) + 2H₂O_(l)
(iv) C₆H₅CHO_(l) + 2Cu²⁺_(aq) + 5OH^-_(aq) \(\longrightarrow\) No change observed.
What interference do you draw about the behavior of Ag⁺ and Cu²⁺ from these reactions?

'X' is an impure substance. Is it an element, compound or mixture?

What are the basic properties used to identify a substance?

Why is distilled water a compound whereas tap water is a mixture?

Mixture of salt and water is a solution while that of oil and water is not. Explain

Why is air sometimes considered as a heterogeneous mixture?

By applying the knowledge of chemical classification, classify each of the following into elements, compounds or mixtures
Sugar

Matter is defined as anything that has mass and occupies space. All matter is composed of atoms

Write a note on the differences between elements and compounds

Write a note on 'mixture' based on the chemical classification of matter.

How will you classify matter based on physical state ?

Explain the classification of matter based on chemical composition.

Draw a flow chart to illustrate classification of matter.

Calculate the number of atoms in the following 52 g of He

Calculate the number of atoms in the following 52 moles of He.

Calculate the mass of the following : 1 atom of silver

Calculate the mass of the following : 1 molecule of benzene

Calculate the mass of the following : 1 molecule of water.

One million silver atoms weigh 1.79 x 10^-16 g. Calculate the atomic mass of silver.

How much mass (in gram units) is represented by the following ?
0.2 mol of NH₃

How much mass (in gram units) is represented by the following ?
3.0 mol of CO₂

How much mass (in gram units) is represented by the following?
5.14 mol of H₅IO₆

Calculate the Formula Weights of the following compounds. NO₂

Calculate the Formula Weights of the following compounds.C₆H₁₂O₆ - Glucose

Calculate the Formula Weights of the following compounds. NaOH

Calculate the Formula Weights of the following compounds.Mg(OH)₂

Calculate the oxidation number of nitrogen in nitrous acid and nitric acid

How many moles of barium sulphate is precipitated when 1 mole of aluminium sulphate reacts completely with barium chloride ?

Calculate the mass of the atom in amu

Calculate the oxidation number of underlined atoms of the following:
K₂ MnO₄

Calculate the oxidation number of underlined atoms of the following:
K₂CrO₄

Calculate the oxidation number of underlined atoms of the following :
NO₃^-

What mass of N₂ will be required to produce 34g of NH₃ by the reaction, N₂ + 3H₂ \(\longrightarrow\) 2NH₃·

Calculate the equivalent weight of H₃PO₄ and Ca(OH)₂ on the basis of given reaction.
H₃PO₄ + NaOH \(\longrightarrow\) NaH₂PO₄ + H₂O
Ca(OH)₂ + HCI \(\longrightarrow\) Ca(OH)CI + H₂O

Calculate the gram molecular mass of sugar having molecular formula C₁₂H₂₂O₁₁

Calculate
(a) The mass of 0.5g molecule of sugar and
(b) Gram molecule of sugar in 547.2 g

What is Avogadro number ?

Define molar volume.

State Avogadro's hypothesis.

Define atomicity.

Which law co-relates the mass and volume of a gas?

Does one gram mole of a gas occupy 22.4 Lunder all conditions of temperature and pressure

Bring about the dissimilarities in mole concept and molar mass by clearly analysing them