Which of the following is commonly used to produce foam in froth floatation process?

(a)

Pine oil

(b)

Cresol

(c)

NaCN

(d)

Xanthate

The repeating unit in silicone is_______.

(a)

SiO₂

(b)

(c)

(d)

The ionisation energy of Ga is higher than that of Al because of_________

(a)

more effective nuclear charge of Ga

(b)

smaller atomic size of Ga

(c)

larger size of Ga

(d)

both (a) and (b)

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

An excess of silver nitrate is added to 100ml of a 0.01M solution of pentaaquachloridochromium(III)chloride. The number of moles of AgCl precipitated would be _______.

(a)

0.02

(b)

0.002

(c)

0.01

(d)

0.2

If electrical conductivity is found to be same in all directions through a solid the substance is ________ solid and the property is called _________.

(a)

crystalline, isotropy

(b)

amorphous, isotropy

(c)

crystalline, anisotropy

(d)

amorphous, isotropy

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 200K to 400K? (R = 8.314 JK^-1 mol^-1)

(a)

234.65 kJ mol^-1

(b)

434.65 kJ mol^-1 

(c)

2.305 kJ mol^-1 

(d)

334.65 J mol^-1

Conjugate base for Bronsted acids H₂O and HF are _______.

(a)

OH^- and H₂FH⁺, respectively

(b)

H₃O⁺ and F^-, respectively

(c)

OH^- and F^-, respectively

(d)

H₃O⁺ and H₂F⁺, respectively

Degree of dissociation a is _______.

(a)

\(\alpha =\frac { { K }_{ a } }{ C } \)

(b)

\(\alpha =\frac { { C }^{ 2 } }{ { K }_{ a } } \)

(c)

\(\alpha =\sqrt { \frac { { K }_{ a } }{ C } } \)

(d)

\(\alpha =\sqrt { \frac { C }{ { K }_{ a } } } \)

An example of secondary cell is ________.

(a)

Daniel cell

(b)

galvanic cell

(c)

lead acid accumulator

(d)

dynam

In an electrical field, the particles of a colloidal system move towards cathode. The coagulation of the same sol is studied using K₂SO₄
(i), Na₃ PO₄
(ii), K₄ [Fe(CN)₆]
(iii) and NaCl
(iv) Their coagulating power should be

(a)

II > I > IV > III

(b)

III > II > I > IV

(c)

I > II > III > IV

(d)

none of these

The test used to distinguish wish 1^o, 2^o and 3^o alcohol is ________.

(a)

Lucas test

(b)

Victor Meyer's

(c)

dehydrogenation

(d)

all the above

Which one of the following reaction is an example of disproportionation reaction.

(a)

Aldol condensation

(b)

cannizaro reaction

(c)

Benzoin condensation

(d)

none of these

Amine that cannot be prepared by Gabriel Phthalimide synthesis is ___________

(a)

benzyl amine

(b)

methyl amine

(c)

ethyl amine

(d)

phenyl amine

Insulin is an example of_______hormone.

(a)

paracrine

(b)

endocrine

(c)

autocrine

(d)

none of the above

Discuss the use of an acidic flux in metallurgy.

Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF₃.

How would you account for the following? The electron gain enthalpy with negative sign is less for oxygen than that of sulphur.

What are stereoisomers?

Give any three characteristics of ionic crystals.

H_2(g) + Cl_2(g) \(\overset { hv }{ \longrightarrow } \) 2HCl(g). The reaction proceeds with a uniform rate throughout. What do you conclude? 

When aqueous ammonia is added to CuSO₄ solution, the solution turns deep blue due to the formation of tetra ammine copper (II) complex,\({ [Cu({ H }_{ 2 }O)_4] }_{ (aq) }^{ 2+ }+ 4{ NH }_{ 3 }(aq)\rightleftharpoons { [Cu{ ({ NH }_{ 3 }) }_{ 4 }] }_{ (aq) }^{ 2+ }\) among H₂O and NH₃ Which is stronger Lewis base.

What is the anode, cathode and electrolyte of a mercury button cell?

Arrange the following in the increasing order of their boiling point and give a reason for your ordering
(i) Butan – 2- ol, Butan -1-ol, 2 –methylpropan -2-ol
(ii) Propan -1-ol, propan -1,2,3-triol, propan -1,3 – diol, propan -2-ol

List the applications of gold.

Give reason for the following:
(i) A transition metal exhibits highest oxidation state in oxides and fluorides.
(ii) Cu²⁺ is unstable in an aqueous solution.

What is the oxidation and reduction half cell in a Daniel cell?

What are the factors which influence the adsorption of a gas on a solid?

Halo alkane are easily prepared from alcohols while alkyl halides cannot be prepared from phenol. Justify.

How will you convert benzaldehyde into the following compounds?
(i) benzophenone
(ii) benzoic acid
(iii) α-hydroxyphenylaceticacid.

Write a note on structure of amine.

Name two water soluble vitamins, their sources, function and diseases caused due to their deficiency in diet.

Give the structure of melamine formaldehyde resin.

1. 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.

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. Calculate i) degree of hydrolysis, ii) the constant hydrolysis  and iii) pH of 0.1M CH₃COONa solution (pK_a for CH₃COOH is 4.74).

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

1. How are crystals classified?

2. A first order reaction is 40% complete in 50 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?

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

2. Give the IUPAC name for the following compounds.
   (i) [Ag(NH₃)₂]CI
   (ii) K₃[Fe(CN)₅NO]
   (ill) [Cr(PPh₃)(CO)₃]
   (iv) [Ag(NH₃)₂]⁺
   (v) [FeF₆]^4-

1. How will you convert boric acid to boron nitride?

2. Why is dioxygen a gas but sulphur a solid?