Magnetic separation it is based on the difference in the_________ of the ore and the impurities.

(a)

magnetic properties

(b)

chemical properties

(c)

physical properties

(d)

melting point

Which of the following is not sp² hybridised?

(a)

Graphite

(b)

graphene

(c)

Fullerene

(d)

dry ice

Repeated use of which one of the following fertilizers would increase the activity of the soil_______.

(a)

Ammonium sulphate

(b)

Superphosphate of lime

(c)

Urea

(d)

Potassium nitrate

The actinoid elements which show the highest oxidation state of +7 are _______.

(a)

Np, Pu, Am

(b)

U, Fm, Th

(c)

U, Th, Md

(d)

Es, No, Lr

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 of the following cannot be regarded as molecular solid?

(a)

Silicon carbide

(b)

AIN

(c)

Diamond

(d)

All the above

For a first order reaction A ⟶ B the rate constant is x min⁻¹. If the initial concentration of A is 0.01M, the concentration of A after one hour is given by the expression.

(a)

001. e^−x

(b)

1 x 10^-2(1-e^-60x)

(c)

(1 x 10^-2)e^-60x

(d)

none of these

Which will make basic buffer?

(a)

50 mL of 0.1M NaOH+25mL of 0.1M CH₃COOH

(b)

100 mL of 0.1M CH₃COOH+100 mL of 0.1M NH₄OH

(c)

100 mL of 0.1M HCl+200 mL of 0.1M NH₄OH

(d)

100 mL of 0.1M HCl+100 mL of 0.1M NaOH

An acid is a substance that dissociates to give hydrogen ions in water.
The above concept of acids was proposed by _______.

(a)

Lewis

(b)

Arrhenius

(c)

Bronsted

(d)

Lowry

In Daniel cell, the charges developed by Zn/Zn²⁺ and Cu / Cu²⁺ are _______.

(a)

positive, positive

(b)

negative, negative

(c)

positive, negative

(d)

negative, positive

The phenomenon observed when a beam of light is passed through a colloidal solution is_______.

(a)

Cataphoresis

(b)

Electrophoresis

(c)

Coagulation

(d)

Tyndall effect

The functional isomer of n-propanol is _______.

(a)

2-propanol

(b)

prop-en-ol

(c)

ethyl methyl ether

(d)

acetaldehyde

An alkene “A” on reaction with O₃ and Zn - H₂O gives propanone and ethanol in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is ______.

(a)

\(Cl-{ CH }_{ 2 }-CH_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CH_{ 3 } }{ | } }{ CH } } \)

(b)

\({ H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 2 }Cl }{ | } }{ CH } -{ CH }_{ 3 }\)

(c)

\(\\ { H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CL{ } }{ | } }{ C } } -{ CH }_{ 3 }\)

(d)

\({ H }_{ 3 }C-{ CH }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { Cl }{ | } }{ C } } \)

Nitromethane condenses with acetaldehyde to give

(a)

nitro propane

(b)

1-nitro-2-propanol

(c)

2-nitro-1-propanol

(d)

3-nitro propanol

The ultimate product of hydrolysis of starch in the presence of dilute acid is

(a)

dextrin

(b)

maltose

(c)

maltase

(d)

glucose

Why should we have a ecofriendly metallurgical process?

Describe briefly allotropism in p- block elements with specific reference to carbon.

How is SO₂ an air pollutant?

What are anionic & cationic complex? Give an example.

What are point defects?

Rate of chemical reaction is not uniform throughout. Justify you answer:

What are Lewis acids and bases? Give two example for each.

Higher the standard reduction potential lesser is corrosion. Give reason.

Predict the major product, when 2-methyl but -2-ene is converted into an alcohol in each of the following methods.
(i) Acid catalysed hydration
(ii) Hydroboration
(iii) Hydroxylation using Baeyer's reagent

What is meant by aluminotherrnitc process?

Account for the following:
(i) Cobalt (II) is stable in aqueous solution but in the presence of complexing reagents, it is easily oxidised.
(ii) The d¹ configuration is very unstable in ions.

State Ohms law.

Peptising agent is added to convert precipitate into colloidal solution. Explain with an example.

Account for the following:
(I) Phenol does not get protonated readily.
(ii) Phenol, benzene diazonium chloride, NaOH solution gives red dye.

A carbonyl compound A having molecular formula C₅H₁₀O forms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.

An Organic compound (A) with molecular formula C₆H₇N gives (B) with HNO₂ / HCI at 273 K. The aqueous solution of (B) on heating gives compound (C) which gives violet colour with netural FeCI₃. Identify the compounds (A), (B) and (C) and write the equations.

Write note on oligosaccharides and polysaccharides with examples.

Write a short note on Antioxidants.

1. Complete the following reactions 
   i) CH_3- CH₂ - OH \(\overset { { P}{ Br_3 }{ } }{ \underset { {} }{ \longrightarrow } }\)  A  \(\overset { { aq.NaOH}{ }{ } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { { Na}{ } }{ \underset { {} }{ \longrightarrow } }\) C
   ii) C₆H₅- OH  \(\overset { { Zn \ dust}{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { CH_3}{Cl}{ } }{ \underset { {Anhydrs}{AlCl_3} }{ \longrightarrow } }\) B \(\overset { { acid}{K MnO_4}{ } }{ \underset { {} }{ \longrightarrow } }\) C
   
   

2. An organic compound (A) of molecular formula C₇H₆O is not reduced by Fehling's solution but will undergo Cannizzaro reaction. Compound (A) reacts with aniline to give compound (B). Compound (A) also reacts with Cl₂ in the presence of catalyst to give compound (C). Identify (A) (B) and (C) and explain the reactions.

1. Write the expression for the solubility product of Hg₂Cl₂ .

2. Name the method to deduce the charge of the sol particle. Explain it with a neat diagram.

1. Write note on impurity defect?

2. The activation energy of a reaction is 22.5 k Cal mol^-1 and the value of rate constant at 40°C is 1.8 x 10^-5s^-1. Calculate the frequency factor, A.

1. How are materials classified based on their magnetic properties?

2. Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
   (i) K[Cr(H₂O)₂ (C₂O₄)₂]
   (ii) [Co(en)₃]CI₃
   (iii) [Co(NH₃)₅(NO₂)](NO₃)₂
   (iv) [Pt (NH₃)(H₂O)CI₂]

1. A hydride of 2nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). Identify A, B and C.

2. Explain the oxidising and reducing property of SO₂·