Question # 1

The device that convert the chemical energy of fuel directly into electrical energy is called.

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Galvanic cell

Electrolytic cell

Fuel cell

Concentration cell

Elements of group 14

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Exhibit oxidation state of -4

Exhibit oxidation state of +4

From M3+ and M4+ ions

Form M4- and M4+ iona

A system is said to be in the colloidal state if the particle size of the dispersed phase ranges from

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_o

I to 10 A

10 to 10000 A

10 to 100 A

1000 to 10000 A

The branch of chemistry which deals with the analysis of chemical products is known as.

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Physical chemistry

Organic chemistry

Inorganic chemistry

Analytical chemistry

Electronegativity is given by

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Average of first and second ionization energies.

Average of first and second electron affinites

Average of ionization energy and electron affinity

None of the above

Elements in which differentiating electron enters the (n-1) the d-orbitals of the (n-1) the main shell are called elements.

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s- block

p-block

d-block

f-block

The link between classical thermodynamics and quantum mechanics is prevented by

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Statiatical mechanics

Boltzmann law

Wave mechanics

Matrix mechanics

Polyamide jinkage is present in

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Nylon

Silk

Protein

All of these

Biogical role of nucleic acid doe snot include

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Genetic continuity

Protein syathesis

Hybridization

Mutation

The maximum degree of freedom for a pure substance under equilibrium constitutions is

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1

2

3

zero

The number of coordinates required to specify the position of all the atoms in a molecule is called number of degree of freedom. The vibration degrees of freedom of a linear molecule containing N atoms are

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2N-5

2N -6

3N -5

N-6

Pick out the incorrect statement about K2Cr2O7

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It is thermally stable

It dissolves in alkali to form chromate

It oxidizes acidified FeSO4 solution to Fe2(SO4)3

It is used as cleansing agent for glassware. etc. When mixed with cold con. H2SO4

The common oxidation state of lanthanides is.

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+3

+2

+1

+4

Which of the following does not apply to nanotechnology.

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It is a general purpose technology

It can be called Green technology

Newtonian mechanics can describe it.

It involves rearrangement of atoms

The solution of the transition metal complexes having one or more unpaired electrons in the d-orbital are.

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Coloured

Colourless

White

None of above

Which of the following glass transmits the maximum light.

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Serrated glass

Clear glass

Milk glass

Opalescent glass

Which type of the solids are generally good conductors of electricty.

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Covalent

Ionic

Metallic

Molecular

Which of the following cast irons is a high carbon, iron carbon silicon alloy.

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Deorizers

Deoxidizers

Deoxifiers

Deterrent

The denationalization involving C - H sigma bond electrons is known as .

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Conjugation

Hyperconjugation

Mesomerism

Resonance

The element with atomic numebr greater than 100 are known as

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Trans uranium elements

Trans fermium elements

Actinides

Lanthanides

XeF4 is obtained, when a mixture of Xenon and fluorine in the ratio is heated in a nickle vessel at 400 ^oC

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1 : 3

5 :1

1 :20

1 :5

The basic strength of hydrides of group 15 elements very in the following order.

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NH3 > PH3 > AsH3 > SbH3 >BiH3

PH3 > NH3 > AsH3> SbH3 > BiH3

BiH3> NH3 >PH3 > AsH3 > SbH3

NH3 > PH3 > SbH3 > AsH3 > BiH3

For which of the following compounds is the rate of hydrolysis by aqueous alkali most likely to be independent of the hydroxide ion concentration.

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1-Chlorobutane

2- Bromobutane

1- Iodobutane

2- Bromo -2- methyl butane

Which of the following molecules can oxhibit geometrical isomerism.

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CH3CH = CH2

CH3CH = CHCH3

(CH3)2 C = CH2

CH3CH = C(CH3)2

The minimum amount of energy that the reacting molecules must posses at the time of collations in under to produce effective collisions is called.

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Free energy

Threshold energy

Activation energy

External energy

The reciprocal of the coefficient of viscosity in called.

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Density

Specific gravity

Fluidity

Conductance

Which of the following hydroxides is most stable.

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Mg (OH)2

Ca(OH)2

Sr (OH)2

Ba (OH)2

Mostly used solvents for ionic compounds.

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Liquid ammonia

Liquid SO2

Liquid HF

All above

Which of the following property has a higher value for trans isomer as compared to cis isomer.

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Density

Dipole moment

Melting point

Boiling point

Among the solvents given below, with dielectric constant (E) given in parentheses which has highest solubility of KCI?

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Benzene (E=O)

Carbon disulphide (E = O)

Methanol (E =32)

Acetone (E = 2)

Stainless steel contains

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Fe+Cr+Ni

Fe+Ni+Cu

Fe + Cr+ Cu

Cu + C + Ni

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