Balance the following reaction:
Sb³⁺+ Mn\({ O }_{ 4 }^{ - }\)\(\rightarrow \) Sb⁵⁺+ Mn²⁺

Define the following:
(i) Element
(ii) Compound.

Give two examples of elementary molecules which are
(i) Monoatomic
(ii) Diatomic and
(iii) Polyatomic.

Define a.m.u or unified atomic mass.

Calculate the mass of the following atoms in a.m.u (unified atomic mass).

The relative abundance of ₆C¹²,₆C¹³ and ₆C¹⁴ are 98.892%, 1.108% and 2 x 10^-10respectively. Calculate the average atomic mass of carbon.

The relative abundance of ₁₀Af³⁶, ₁₀Ar³⁸,₁₀.Ar⁴⁰are 0.337%,0.063% and 99.6% respectively. Calculate the average atomic weight of Argon:

Calculate the molecular masses of the following : KMnO₄,

Calculate the molecular masses of the following : NaOH

Calculate the molecular masses of the following : H₂C₂O₄.2H₂O,

Calculate the molecular masses of the following : C₆H₁₂O₆

Explain the term "mole".

Calculate the number of atoms / molecules present in the following : 10 gram of mercury

Calculate the number of atoms / molecules present in the following 1.8 gram of water

Calculate the number of atoms / molecules present in the following 100 gram of sulphur dioxide

Calculate the number of atoms / molecules present in the following 1 kg of acetic acid (CH₃COOH)

Calculate the number of atoms / molecules present in the following 46 gram of sodium

Calculate the number of moles present in 9 grams of ethane.

Calculate the volume occupied at STP by the following: 0.5 mole of methane

A substance an analysis, gave the following percentage composition, Na = 43.4%, C = 11.3%, 0 = 43.3% calculate its empirical formula

An organic compound contains the following composition by mass: C = 92.3%, H = 7.7%. At STP, 10L of the gas has the mass 11.6g. Find the molecular formula of the compound.

An organic compound has the following composition by mass:C = 40.92%, H = 4.58% and the rest oxygen. The molar mass of the compound is 176g mol. Determine the molecular formula of the compound.

Mass of one atom of an element is 6.66 x 10^-23 g.How many moles of element are there in 0.320 kg ?

What is the amount of silver oxide formed when 11.04g of silver carbonate is strongly heated ? Write the balanced chemical equation for the .reaction.
Ag₂C0₃ \(\rightarrow\)2AgO + CO₂.

How much volume of hydrogen is liberated when 0.12g of magnesium reacts with dilute hydrochloric acid ?

How much volume of nitrogen and hydrogen are required-to produce 100 cm³ of ammonia ?

Calculate the equivalent, mass of hydrated sodium carbon.

Calculate the mass of sodium (in kg) present in 95 kg of a crude sample of sodium nitrate whose percentage purity is 70%.

A Compound on analysis gave the following percentage composition C = 54.55%, H = 9.09%, O = 36.36%. Determine the empirical formula of the compound.

Distinguish among the different physical states of matter.

Define equivalent mass of a salt.

How much copper can be obtained from 100 g of anhydrous copper sulphate ?

Calculate the equivalent mass of hydrated ferrous sulphate

A sample of hydrated copper sulphate is heated to drive off the water of crystallization, cooled and reweighed 0.869 g of CuSO₄.aH₂O gave a residue of 0.556 g. Find the molecular formula of hydrated copper sulphate.

Balance by oxidation number method : Mg + HNO₃ \(\rightarrow\) Mg(NO₃)₂ + NO₂ + H₂O

Explain about the classification of matter.

Calculate the mass of the following atoms in amu,
(a) Helium (mass of He = 6.641 x 10^-24g)
(b) Silver (mass of Ag = 1.790 X 10^-22g)

Calculate the number of atoms present in 1 Kg of gold

Calculate the molar volume of 146 g of HCI gas and the number of molecules present in it

Calculate the molar mass of 20 L of gas weighing 23.2 g at STP.

0.6 g of a metal gives on oxidation 1 g of its oxide. Calculate its equivalent mass

How would you calculate the equivalent mass of anhydrous oxalic acid and hydrated oxalic acid.

A compound on decomposition in the laboratory produces 24.5 g of nitrogen and 70 g of oxygen. Calculate the empirical formula of the compound.

What is the steps involve in the calculation of molecular formula from empirical formula?

What is combination reaction? Give example

What is decomposition reaction? Give two examples.

What are displacement reactions? Give its types. Explain with example.

What is disproportionation reactions? Give example

What are competitive electron transfer reaction? Give example

Balance the following equation using oxidation number method.

Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% oxygen by mass

In three moles of ethane (C₂H₆) calculate the following:
(i) Number of moles of carbon atoms.
(ii) Number of moles of hydrogen atoms.
(iii) Number of molecules of ethane.

Chlorine is prepared in the laboratory by treating manganese dioxide (MnO₂) with aqueous hydrochloric acid according to the reaction.
\({ 4HCl }_{ (aq) }+{ Mn }O_{ { 2 }_{ (s) } }\rightarrow 2H_{ 2 }{ O }_{ (1) }+{ MnCl }_{ { 2 }_{ (aq) } }+{ Cl }_{ { 2 }_{ (g) } }\)
How many grams of HCI react with 5.0 g of manganese dioxide?
(Atomic mass of Mn = 55 g).

The density of water at room temperature is 1.0 g/mI. How many molecules are there in a drop of water if its volume is 0.05 ml ?

Balance the following equation by oxidation number method. MnO₄^- + Fe²⁺ \(\rightarrow\)  Mn²⁺ + Fe³⁺ (Acidic medium)

Balance the following equation using oxidation number method
As₂ S₃ + HNO₃ + H₂O \(\rightarrow\) H₃ AsO₄ + H₂ SO₄ + NO