Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

The following set of reactions are used in refining Zirconium 
\(Zr \text{(impure)}+2I_{ 2 }\overset { 523k }{ \longrightarrow } ZrI_{ 4 }\)
\({ ZrI }_{ 4 }\overset { 1800K }{ \longrightarrow } Zr \text{(pure)}+{ 2I }_{ 2 }\)This method is known as ______.

In diborane, the number of electrons that accounts for banana bonds is ________.

The compound that is used in nuclear reactors as protective shields and control rods is _________.

Which of the following d block element has half filled penultimate d sub shell as well as half filled valence sub shell?

In acid medium, potassium permanganate oxidizes oxalic acid to _______.

Which one of the following statements related to lanthanons is incorrect?

Which one of the following is not correct?

Which one of the following pairs represents linkage isomers?

Potassium has a bcc structure with nearest neighbor distance 4.52 \(\overset{o}{A}\). Its atomic weight is 39. its density will be_______.

Predict the rate law of the following reaction based on the data given below 
2A+B⟶C+3D

The solubility of BaSO₄ in water is 2.42 × 10^-3gL^-1 at 298K. The value of its solubility product(K_sp) will be (Given molar mass of BaSO₄ =233g mol^-1)

Calculate Λ^o_HoAC using appropriate molar conductances of the electrolytes listed above at infinite dilution in water at 25^oC_______.

CH₃Br \(\overset { KCN }{ \longrightarrow } (A)\overset { { H }_{ 2 }{ O }^{ + } }{ \longrightarrow } (B)\overset { { PCl }_{ 5 } }{ \longrightarrow } \) (C) product (c) is ______.

Assertion: p – N, N – dimethyl amino benzaldehyde undergoes benzoin condensation
Reason: The aldehydic (-CHO) group is meta directing.
Codes:
A) if both assertion and reason are true and reason is the correct explanation of assertion.
B) if both assertion and reason are true but reason is not the correct explanation of assertion.
C) assertion is true but reason is false
D) both assertion and reason are false

Discuss the use of an acidic flux in metallurgy.

Name some depressing agents.

Name the building block of zeolites. Why zeolites have high porosity?

Why transition elements form complexes? 

Explain briefly seven types of unit cell.

A compound made up of two atoms X and Y has a face centred cubic arrangement. X is present in the coners and Y at the centre of each face. If one atom is missing from corner. What is the simplest formula of the compound.

Define half life of a reaction. Show that for a first order reaction half life is independent of initial concentration.

The rate law for a reaction of A, B and C has been found to be rate = k[A]²[B][L]^3/2 How would the rate of reaction change when
(i) Concentration of [L] is quadrupled
(ii) Concentration of both [A] and [B] are doubled
(iii) Concentration of [A] is halved
(iv) Concentration of [A] is reduced to \(\left(\frac{1}{3}\right)\) and concentration of [L] is quadrupled.

For a chemical reaction, Variation in the concentration In[A] Vs time in seconds is given as

(i) What is the order of the reaction?
(ii) What is the unit of rate constant K?
(iii) Give the relationship between k and \({ t }_{ \frac { 1 }{ 2 } }\)

Identify the conjugate acid base pair for the following reaction in aqueous solution
i) HS^- (aq) + HF \(\rightleftharpoons \) F^-(aq) + H₂S(aq)
ii) HPO^2-₄ + SO₃^2- \(\rightleftharpoons \) PO₄^3- + HSO₃^-
iii) NH₄⁺ + CO₃^2-  \(\rightleftharpoons \) NH₃ + HCO₃^-

Why is anode in galvanic cell considered to be negative and cathode positive electrode?

Thermal decomposition of KClO₃  in presence of MnO₂ proceeds as follows.
Steps in the reaction 2KClO₃  → 2KCl + 3O₂ can be given as

How is propanoic acid is prepared starting from
(a) an alcohol
(b) an alkylhalide
(c) an alkene

There are two isomers with the formula  CH₃NO₂. How will you distinguish between them?

Write short notes on the following
i. Hofmann’s bromide reaction
ii. Ammonolysis
iii. Gabriel phthalimide synthesis
iv. Schotten – Baumann reaction
v. Carbylamine reaction
vi. Mustard oil reaction
vii. Coupling reaction
viii. Diazotisation
ix. Gomberg reaction

What is gravity separation?

Explain roasting with an example.

Distinguish Roasting and Calcination.

What is meant by aluminothermic process?

List the applications of gold.

How is boron trifluoride obtained from boron trioxide?

Find out the oxidation state of carbon in each of the following:
(i) CaC₂
(ii) H₂CO₃
(iii) HCN
(iv) CO

Name a reaction for the estimation of Ozone.

Discuss the anomalous nature of fluorine.

Predict the product
(i) PCI₅+ C₂H₅OH \(\longrightarrow \)?
(ii) P₄+ SO₂Cl₂ \(\longrightarrow \) ?
(iii) POCl₃ + H₂O \(\longrightarrow \) ?
(iv) HBr + PH₃\(\longrightarrow \) ? :,
(v) PCl₃+ H₂O\(\longrightarrow \) ?

Write the properties of interstitial compound.

Mohr's salt answers the presence of Fe²⁺, NH⁴⁺and SO₄^2- ions, whereas the potassium ferrithiocyanate will not answer Fe³⁺ and SCN ions give reason.

Give the characteristics of first order reaction.

What are drugs? How are they classified.

Write the structural formula of aspirin.

Explain the principle of electrolytic refining with an example.

Deduce the oxidation number of oxygen in hypofluorous acid – HOF.

Why first ionization enthalpy of chromium is lower than that of zinc?

If NaCl is doped with 10^-2 mol percentage of strontium chloride, what is the concentration of  cation vacancy?

The half life of the homogeneous gaseous reaction SO₂Cl₂ → SO₂ + Cl₂ which obeys first order kinetics is 8.0 minutes. How long will it take for the concentration of SO₂Cl₂ to be reduced to 1% of the initial value?

Benzene diazonium chloride in aqueous solution decomposes according to the equation \({ C }_{ 6 }{ H }_{ 5 }{ N }_{ 2 }Cl\longrightarrow { C }_{ 6 }{ H }_{ 5 }Cl+{ N }_{ 2 }\)Starting with an initial concentration of 10g L^-1, the volume of N₂ gas obtained at 50 °C at different intervals of time was found to be as under:

Show that the above reaction follows the first order kinetics. What is the value of the rate constant?

Write the expression for the solubility product of Ca₃(PO₄)₂

Write the expression for the solubility product of Hg₂Cl₂ .

A copper electrode is dipped in 0.1M copper sulphate solution at 25^oC. Calculate the electrode potential of copper. [Given: E⁰_Cu²⁺|Cu = 0.34V].

Explain any one method for coagulation.

Explain intermediate compound formation theory of catalysis with an example.

Write the differences between nitro methane and nitro benzene.

Elucidate the structure of fructose.

Write a note on drug target interaction.

Explain the prepareation of Bakelite and Give its use.