In acid leaching process the insoluble sulphide is converted into soluble sulphate and elemental_______.

(a)

carbon

(b)

lead

(c)

sulphur

(d)

zinc

Oxidation state of carbon in its hydrides _______.

(a)

+4

(b)

-4

(c)

+3

(d)

+2

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 magnetic moment of Mn²⁺ ion is _______.

(a)

5.92BM

(b)

2.80BM

(c)

8.95BM

(d)

3.90BM

A magnetic moment of 1.73BM will be shown by one among the following.

(a)

TiCl₄

(b)

[CoCl₆]^4-

(c)

[Cu(NH₃)₄]²⁺

(d)

[Ni(CN)₄]^2-

The number of close neighbours in a body centred cubic lattice of identifical spheres is _______.

(a)

6

(b)

4

(c)

12

(d)

8

The half life period of a radioactive element is 140 days. After 560 days, 1 g of element will be reduced to

(a)

\(\left( \frac { 1 }{ 2 } \right) g\)

(b)

\(\left( \frac { 1 }{ 4 } \right) g\)

(c)

\(\left( \frac { 1 }{ 8 } \right) g\)

(d)

\(\left( \frac { 1 }{ 16 } \right) g\)

Which of the following can act as Lowery – Bronsted acid well as base?

(a)

HCl

(b)

SO₄²⁻

(c)

HPO₄²⁻

(d)

Br^-

The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salt is given by _______.

(a)

\([{ H }^{ + }]={ K }_{ a }\frac { [Acid] }{ [Salt] } \)

(b)

\([{ H }^{ + }]={ K }_{ a }[Salt]\)

(c)

\([{ H }^{ + }]={ K }_{ a }[Salt]\)

(d)

\([{ H }^{ + }]={ K }_{ a }\frac { [Acid] }{ [Salt] } \)

Using the data given below fmd out the strongest reducing agent ______.
\({ E }_{ { Cr }_{ 2 }{ O }_{ 7 }^{ 2- } }^{ o }{ Cr }^{ 3+ }=1.33V{ ,E }_{ { Cl }_{ 2 }{ / }{ Cl }^{ - } }^{ o }=1.36V\)
\({ E }_{ { Mn }O_{ 4 }^{ - } }^{ 0 }/{ Mn }^{ 2+ }=1.51V,{ E }_{ { Cr }^{ 3+ }/Cr }^{ o }=-0.74V\)

(a)

Cr

(b)

Cr³⁺

(c)

Cl^-

(d)

Mn²⁺

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

(a)

Cataphoresis

(b)

Electrophoresis

(c)

Coagulation

(d)

Tyndall effect

Ethers are insoluble in water due to the ______.

(a)

absence of co-ordinate bond

(b)

presence of co-ordinate bond

(c)

absence of H - bond

(d)

presence of H - bond

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)

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

Which one of the following is a secondary amine?

(a)

aniline

(b)

diphenyl amine

(c)

see.butylamine

(d)

tert.butylamine

Name the various refining process.

Give the uses of Borax

Give two uses of nitric acid.

Calculate the magnetic moment of [Fe(H₂O)₆]²⁺, if atomic number of Fe is 26.

Arrange the following as indicated below:
(i) F₂, Cl₂, Br₂, I₂ - increasing bond dissociation enthalpy.
(ii) HF, HCI, HBr, HI - increasing acidic strength.

How will you determine the rate constant for the Decomposition of nitrogen pentoxide in CCl₄.

Discuss the Lowry – Bronsted concept of acids and bases.

Give the empirical relationship between molar conductance and concentration of the electrolyte.

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

Write the chemical composition of the following alloys and give anyone of its application.
(i) Bronze
(ii) Brass
(iii) Stainless steelass

What is chromyl chloride test? Give equations.

How to predict the feasibility of a cell reaction?

Examine the given defective crystal:

X+	Y-	X+	Y-	X+
Y-	O		X+
X+		X+	O	X+
Y-	X+	Y-	X+	Y-

Answer the following questions
(i) Is the above defect stoichiometric or non-stoichiometric?
(ii) What are such defects called? Give an example of the compound which shows this type of defect.

Account for the following:
(a) Lower members of alcohols are soluble in water but higher members are not.
(b) Alcohols cannot be used as solvent for Grignard reagent.

An alkene (A) on ozonolysis gives propanone and aldehyde (B). When (B) is oxidised (C) is obtained. (C) is treated with Br₂/P gives (D) which on hydrolysis gives (E). When propanone is treated with HCN followed by hydrolysis gives (E). Identify A, B, C, D and E.

Write a note on structure of amine.

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

Give examples for
(i) addition polymer,
(ii) Synthetic rubbers,
(iii) Condensation polymers,
(iv) formaldehyde resins.

1. Complete the following reactions
   
   ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)

2. An aromatic aldehyde (A) of molecular formula C₇H₆O which has the smell of bitter almonds on treatment with (CH₃CO)₂O and CH₃COONa to give compound (B) which is an aromatic unsaturated add. (A) also reacts with (A) in the presence of ale. KCN to give dimer (C). Identify (A), (B) and (C). Explain the reactions.

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. An amorphous solid (A) burns in air to form a gas (B) which turns lime water milky. The gas is also produced as a byproduct during roasting of sulphide ore. This gas decolourises acidified aqueous KMnO₄ solution and reduces Fe³⁺ to Fe²⁺. Identify the solid 'A' and the gas 'B' and write the reactions involved.

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

2. Write a note on Freundlich adsorption isotherm.

1. In a pseudo first order hydrolysis of ester in water, the following results were obtained.

   1	0	30	60	90
   [Ester]mol L-1	0.55	0.31	0.17	0.085

   (i) Calculate the average rate of reaction between the time interval 30 to 60 seconds.
   (i) Calculate the pseudo first order rate constant for the hydrolysis of ester.

2. How do nature of the reactant influence rate of reaction.

1. Write a short note on the oxidation states of 3d series elements.

2. What is meant by stability of a co-ordination compound in solution? State the factors which govern stability of complexes.