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

Calculate the equivalent mass of potassium dichromate in acid medium
[K₂Cr₂O₇ + 4H₂SO₄ )\(\rightarrow\)K₂SO₄ + Cr₂(SO₄)₃ +₄H₂O + 3(O) 3 x 16 = 48 294 g]

Calculate the oxidation number of underlined atoms \({ C }_{ \underline { 6 } }{ H }_{ 12 }{ O }_{ 6 }\)

Calculate the number of moles present in the following 19.5g of potassium

Calculate the equivalent mass of barium hydroxide

Balance the following reaction:
P+ HNO₃\(\rightarrow\) H₃PO₄ + NO₂ + H₂O

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.

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.

Define equivalent mass of a salt.

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

How much volume of chlorine is required to form 11.2 L of HCI at 273 K and 1 atm pressure?

Using s, p, d notations, describe the orbital with the following quantum numbers.
(i) n =1 ,l = 0
(ii) n = 3, l= 1
(iii) n = 4, l= 2
(iv) n =4 , l = 3

Describe the Aufbau principle

Explain the shapes of p orbitals

What is Stark effect?

Calculate the kinetic energy of a moving electron which has a wavelength 4.8 pm. (mass of electron = 9.11 x 10^-31 kg, h = 6.63 x 10^-34 JS)

Explain the meaning of the symbol 4f². Write all the four quantum numbers for these electrons.

Justify that the fifth period of the periodic table should have 18 elements on the basis of quantum numbers.

Describe in brief Lothar Meyer's classification of elements.

Predict the position of the element having an electron configuration(n -1) d¹ ns² for n = 4.

Draw a simplified form of periods and elements present in modern period table.

Explain about the classification of elements based on electronic configuration.

Explain about the salient features of metals.

How do you expect the metallic hydrides to be useful for hydrogen storage?

What kind of compounds can be dissolved and hydrolysed in water?

Give a brief account of the action of water on non metals

Explain the different methods of preparation of Tritium with equation.

What are metallic hydrides? Explain about it.

Write the chemical equations for the reactions involved in solvay process of preparation of sodium carbonate.

Why is the density of potassium less than that of sodium?

IE₂ values of alkaline earth metals are much smaller than those of alkali metals. Explain

How would you explain the following observation? BeO is almost insoluble but BeSO₄ is soluble in water.

Explain how alkali metal oxide reacts with water?

Copper and chlorine compounds makes blue fire work. Why?

State Boyle's law.

One mol of SO₂ gas occupies a volume of 500 ml at 27°C and 50 atm pressure. Calculate the compressibility factor of the gas. Comment on the type of deviation shown by the gas from the ideal behaviour.

Explain Charles' law with an experimental illustration.

Explain the graphical representation of Charles law.

30.4 kJ is required to melt one mole of sodium chloride. The entropy change during melting is 28.4 JK^-1 mol^-1. Calculate the melting point of sodium chloride.

Define work.

What is the need for second Law of thermodynamics.

Define entropy of fusion.

What are informations do you get from the thermo chemical equations?

Given N₂(g) + 3H₂(g) \(\rightarrow\) 2NH₃(g); \(\Delta \)H°=-92.4 kJ mol^-1. What is the standard enthalpy of formation of NH₃(g)?

Calculate ΔH_r⁰ for the reaction CO₂(g) + H₂(g) ⟶ CO(g) + H₂O (g) given that ΔH^f₀ for CO₂ (g), CO (g) and H₂O (g) are - 393.5, - 111.31 and - 242 kJ mol^-1 respectively.

The value of K_c for the following reaction at 717 K is 48.

List out few examples of irreversible reactions (changes) taking place in our daily life activity.

Discuss the equilibrium involving dissolution of solids or gases in liquids.

What happens when the' concentration of H₂ and I₂ are increased in the reaction \({ H }_{ 2 }+{ I }_{ 2 }\rightleftharpoons 2HI?\)

Ethylene glycol (C₂H₆O₂) can be at used as an antifreeze in the radiator of a car. Calculate the temperature when ice will begin to separate from a mixture with 20 mass percent of glycol in water used in the car radiator. K_f for water = 1.86 K Kg mol^-1 and molar mass of ethylene glycol is 62 g mol^-1.

A sample of 56g of ethanol is dissolved in 36g of. water. Calculate the mole fraction of ethyl alcohol

How much volume of 6 M solution of NaOH is required to prepare 500 mL of 0.250 M NaOH solution ?

NaOH and HCI react to form NaCI and H₂0 (a) What volume of 0.250 M NaOH solution contains 0.110 mol of NaOH (b) What of volume of 0.20 M NaOH is required to exactly react with 0.150mol HCI?

Calculate the boiling point of a solution which is prepared by dissolving 68.4g of solute 8 in one kilogram of water. (Molar mass of solute 8 is 342 g mol¹, Tb= 373.1K and Kb( water) = 0.52 K kg mol¹.

What is covalent bond? Give suitable examples to represent single, double and triple covalent bonds.

Comment on the following statements. .
(i) BF₃ is planar but NH₃ is not.
(ii) SiF₄ and C/O^-₄ are tetrahedral
(iii) HSH bond angle in H₂S is 92° and HOH bond angle in H₂0 is 104.5.

(i) Calculate the bond order of H₂ and B₂
(ii) Show how the bond order is related to stability and bond length of the molecule.

0.16 g of an organic compound was heated in a carius tube and H₂SO₄ acid formed was precipitated with BaCl₂. The mass of BaSO₄ was 0.35g. Find the percentage of sulphur [30.04]

Write a short note on homologous series.

Write a note on cis-trans isomerism in oximes and azo compounds.

Suggest and explain the method suitable to purify the organic compounds depending on their boiling points.

While writing the resonance structures, what are the rules to be followed ?

Which of the following compounds will not exist as resonance hybrid? Give reason for your answer.
(i) CH₃ - OH
(ii) R-CONH₂
(iii) CH₃-CH = CH-CH₂NH₂

Explain the isomerism exhibited by alkenes.

Among anthracene and cyclopentadiene which is aromatic? Give reason for your answer.

Two isomers (A) and (B) have the same molecular formula C₂H₄Cl₂. Compound (A) reacts with aqueous KOH gives compound (C) of molecular formula C₂H₄O. Compound (B) reacts with aqueous KOH gives compound(D) of molecular formula C₂H₆O₂. Identify (A), (B), (C) and (D).

How does bromo ethane react with the following?
(i) Silver Oxide(moist)
(ii) Sodium hydrogen sulphide
(iii) Potassium cyanide

Haloalkanes produce mixture of olefins- say true or false and justify yoyr answer,

From where does ozone come in the photo chemical smog ?

Bring out the differences between classical and photochemical smog