In Hall-Heroult process___________act as an anode.

(a)

Carbon blocks

(b)

hydrogen

(c)

copper rods

(d)

Zinc rods

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

(a)

Metal borides

(b)

metal oxides

(c)

Metal carbonates

(d)

metal carbide

Helium is used in balloons in the place of hydrogen because it is________.

(a)

incombustible

(b)

radioactive and detected easily

(c)

lighter than hydrogen

(d)

both (a) and (c)

Which one of the following is not correct?

(a)

La(OH)₃ is less basic than Lu(OH)₃

(b)

In lanthanoid series ionic radius of Ln³⁺ ions decreases

(c)

La is actually an element of transition metal series rather than lanthanide series

(d)

Atomic radii of Zr and Hf are same because of lanthanide contract

Which one of the following complexes is not expected to exhibit isomerism?

(a)

[Ni(NH₃)₄(H₂O)₂]²⁺

(b)

[Pt(NH₃)₂Cl₂]

(c)

[Co(NH₃)₅SO₄]Cl

(d)

[FeCl₆]^3-

Which one of the following statements is wrong about Frenkel defect?

(a)

An ion occupies an interstitial position

(b)

Anion is much larger in size than the cation

(c)

The crystal remains neutral

(d)

Non-stoichiometric compound is formed

Assertion: Rate of reaction doubles when the concentration of the reactant is doubles if it is a first order reaction.
Reason: Rate constant also doubles
Codes:
a) Both assertion and reason are true and reason is the correct explanation of assertion.
b) 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.

(a)

Both assertion and reason are true and reason is the correct explanation of assertion.

(b)

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.

The percentage of pyridine (C₅H₅N) that forms pyridinium ion (C₅H₅NH) in a 0.10M aqueous pyridine solution _______.(K_b for C₅H₅N = 1.7×10^-9) is 

(a)

0.006%

(b)

0.013%

(c)

0.77%

(d)

1.6%

Ostwald's dilution law is applicable in the case of the solution of _______.

(a)

CH₃COOH

(b)

NaCI

(c)

NaOH

(d)

H₂SO₄

Debye constants A and B depend on ______.

(a)

nature of the solvent

(b)

temperature

(c)

concentration of the solvent

(d)

both nature of the solvent and temperature

Match the following

a	V2O5	i	High density polyethylene
b	Ziegler – Natta	ii	PAN
c	Peroxide	iii	NH3
d	Finely divided Fe	iv	H2SO4

(a)

A	B	C	D
iv	i	ii	iii

(b)

A	B	C	D
i	ii	iv	iii

(c)

A	B	C	D
ii	iii	iv	i

(d)

A	B	C	D
iii	iv	ii	i

In the sequence of reactions Identify 'C'.

(a)

(b)

(c)

(d)

Predict the product Z in the following series of reactions Ethanoic acid \(\overset { { PCI }_{ 5 } }{ \longrightarrow } X\overset { { C }_{ 6 }{ H }_{ 6 } }{ \underset { Anhydrous \ AlCI }-_{3}{ \longrightarrow } } Y\overset { 1){ CH }_{ 3 }MgBr }{ \underset { II){ H }_{ 3 }{ O }^{ + } }{ \longrightarrow } } Z.\)

(a)

(CH₃)₂ C(OH)C₆H₅

(b)

CH₃CH(OH)C₆H₅

(c)

CH₃CH(OH)CH₂- CH₃

(d)

Electrolytic reduction of nitrobenzene in strongly acidic medium gives

(a)

aniline

(b)

p - aminophenol

(c)

m-nitroaniline

(d)

azoxybenzene

Which contains a long chain ester?

(a)

Wax

(b)

Cooking oil

(c)

Turpentine oil

(d)

Cellulose

Name the metals that are obtained from their oxides using hydrogen as reducing agent.

Give the structure of CO and CO₂.

What is the reaction of Phosphorous with alkali?

Name the type of isomerism that occurs in complexes in which both cation and anion are complex ions.

Define unit cell.

How does the value of rate constant vary with reactant constant.

Calculate the pH of 0.001M HCl solution

Give a mathematical expression that relates I cell constant, specific conductance and specific resistance.

Suggest a suitable reagent to prepare secondary alcohol with identical group using Grignard reagent.

List the applications of gold.

Which is the last element in the series of the actinoids? Write the electronic configuration of this element comment on the possible oxidation state of this element.

Why does the emf of Leclanche cell decrease?

Addition of Alum purifies water. Why?

How will you prepare phenol (i) From chloro benzene (ii) From benzene sulphonic acid?

Identify A, B, C and D
\(\text { ethanoic acid } \stackrel{\mathrm{SOCl}_{2}}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Pd} / \mathrm{BaSO}_{4}}{\longrightarrow} \mathrm{B} \stackrel{\mathrm{NaOH}}{\longrightarrow} \mathrm{C} \stackrel {\longrightarrow}{\triangle} \mathrm{D}\)

How are the following compounds obtained from benzene diazonium chloride?
(i) phenol
(ii) ester
(iii) p-hydroxy azo benzene

Give the structure of α - D - glucose and β- D - glucose

Give some of the advantages of using food additives.

1. A double salt which contains fourth period alkali metal (A) on heating at 500K gives (B). Aqueous solution of (B) gives white precipitate with BaCl₂ and gives a red colour compound with alizarin. Identify A and B.

2. Give reason for the following :
   (i) N₂O₅ is more acidic than N₂O₃
   (ii) Thermal stability decreases from H₂O to H₂Te.
   (iii) Fluoride ion has higher hydration enthalpy than chloride ion.

1. Complete the following reactions
   (i) Cr₂O₇^2- ⟶
   (ii) Cr₂O₇^2- + 6I^-+ 14H⁺ ⟶
   (iii)  Cr₂O₇^2-+ 3S^2-+ 14H⁺ ⟶
   (iv) Cr₂O₇^2- + 3SO₂ + 2H⁺ ⟶
   (v) Cr₂O₇^2- + 3Sn²⁺ + 14H⁺ ⟶
   (vi) K₂Cr₂O₇ + 8H₂SO₄ + 3CH₃CH₂OH ⟶
   (vii) 2MnO₄^- + 5(COO)^2- + 6H⁺ ⟶
   (viii) 2MnO₄^- + 10I^- + 16H⁺ ⟶
   (ix) 2MnO₄^- + 5S^2-+ 16H⁺ ⟶
   (x) 2MnO₄^- + 5NO₂^- + 6H⁺ ⟶
   (xi) 2KMnO₄ + 3H₂SO₄ + 5CH₃CH₂OH ⟶
   (xii) 2MnO₄^- + 5SO₃^2- + 6H⁺ ⟶

2. Ionic solids, which have anionic vacancies due to metal excess defect, develop colour. Explain with the help of a suitable example.

1. How are metal carbonyls classified depending on the number of metal atoms?

2. 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:

   t(min)	6	12	18	24	30	\(\infty \)
   Vol of N2 (ml)	19.3	32.6	41.3	46.5	50.4	58.3

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

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

2. 0.44g of a monohydric alcohol when added to methyl magnesium iodide in ether liberates at STP 112 cm³ of methane with PCC the same alcohol form a carbonyl compound that answers silver mirror test. Identify the compound.

1. Write the characteristics of adsorption.

2. Account for reducing nature of formic acid.