Bauxite has the composition ______.

(a)

Al₂O₃

(b)

Al₂O₃.nH₂O

(c)

Fe₂O₃.2H₂O

(d)

None of these

An aqueous solution of borax is________.

(a)

neutral

(b)

acidic

(c)

basic

(d)

amphoteric

Which is true regarding nitrogen?

(a)

least electronegative element

(b)

has low ionisation enthalpy than oxygen

(c)

d- orbitals available

(d)

ability to form pπ-pπ bonds with itself

Which one of the following ions has the same number of unpaired electrons as present in V³⁺?

(a)

Ti³⁺

(b)

Fe³⁺

(c)

Ni²⁺

(d)

Cr³⁺

Oxidation state of Iron and the charge on the ligand NO in [Fe(H₂O)₅NO]SO₄ are_______.

(a)

+2 and 0 respectively

(b)

+3 and 0 respectively

(c)

+3 and -1 respectively

(d)

+1 and +1 respectively

Graphite and diamond are ________.

(a)

Covalent and molecular crystals

(b)

ionic and covalent crystals

(c)

both covalent crystals

(d)

both molecular crystals

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

Concentration of the Ag⁺ ions in a saturated solution of Ag₂C₂O₄ is 2.24 ×10^-4mol L^-1 solubility product of Ag₂C₂O₄ is_______.

(a)

2.42 × 10^-8mol³L^-3

(b)

2.66 × 10^-12mol³L^-3

(c)

4.5 × 10^-11mol³L^-3

(d)

5.619 × 10^-12mol³L^-3

The molar conductivity of a 0.5 mol dm^-3 solution of AgNO₃ with electrolytic conductivity of 5.76 ×10⁻³ S cm⁻¹at 298 K is______.

(a)

2.88 S cm²mol^-1

(b)

11.52 S cm²mol^-1

(c)

0.086 S cm²mol^-1

(d)

28.8 S cm²mol ^-1

Fog is colloidal solution of _______.

(a)

solid in gas

(b)

gas in gas

(c)

liquid in gas

(d)

gas in liquid

Carbolic acid is _____.

(a)

Phenol

(b)

Picri cacid

(c)

benzoic acid

(d)

phenylacetic acid

Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _______.

(a)

Grignard reagent

(b)

Sn / HCl

(c)

hydrazine in presence of slightly acidic solution

(d)

hydrocyanic acid

Which of the following reagent can be used to convert nitrobenzene to aniline.

(a)

Sn / HCl

(b)

ZnHg / NaOH

(c)

Zn/NH₄Cl

(d)

All of these

Which one of the following rotates the plane polarized light towards left?

(a)

D(+) Glucose

(b)

L(+) Glucose

(c)

D(-) Fructose

(d)

D(+) Galactose

Which of the following is an analgesic?

(a)

Streptomycin

(b)

Chloromycetin

(c)

Asprin

(d)

Penicillin

Explain the oxidation states of 4d series elements.

Define unit cell.

Explain the effect of catalyst on reaction rate with an example.

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

Define anode and cathode

In case of chemisorption, why adsorption first increases and then decreases with temperature?

What happens when
i. 2 – Nitropropane boiled with HCl
ii. Nitrobenezene undergo electrolytic reduction in strongly acidic medium.
iii. Oxidation of tert – butylamine with KMnO₄
iv. Oxidation of acetoneoxime with trifluoroperoxy acetic acid

What type of linkages hold together monomers of DNA?

What are antibiotics?

Give one test to differentiate [Co(NH₃)₅Cl]SO₄ and [Co(NH₃)₅SO₄]Cl.

Define rate law and rate constant.

Calculate the pH of 0.04 M HNO₃ Solution.

State Faraday’s Laws of electrolysis

Give three uses of emulsions.

Is it possible to oxidise t – butyl alcohol using acidified dichromate to form a carbonyl compound.

Write short notes on the following
iii. Gabriel phthalimide synthesis

Give the differences between primary and secondary structure of proteins.

What are drugs? How are they classified.

1. Explain zone refining process with an example.

2. Give the balanced equation for the reaction between chlorine with cold NaOH and hot NaOH.

1. Write the postulates of Werner’s theory.

2. Differentiate crystalline solids and amorphous solids.

1. What is an elementary reaction? Give the differences between order and molecularity of a reaction.

2. Discuss the Lowry – Bronsted concept of acids and bases.

1. Derive an expression for Nernst equation.

2. Explain intermediate compound formation theory of catalysis with an example.

1. A Compound (A) with molecular formula C₂H₃N on acid hydrolysis gives (B) which reacts with thionylchloride to give compound(C). Benzene reacts with compound (C) in presence of anhydrous AlCl₃ to give compound(D). Compound (D) on reduction with Zn/Hg and Conc.HCl gives (E).  Identify (A), (B), (C) (D) and (E). Write the equations.

2. How is terylene prepared?