Question # 1

Ingold's isoprene rule states that in tepenoids isoprene units are joined.

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Head to tail

Head to Head

Tail to Tail

In a random order

Which of the following statements is worng.

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Covalent compounds are generally soluble is polar solvents

Covalent compounds have low melting and boiling point.

Ionic solids do not conduct electricity is solid state

Ionic compounds conduct electricity in the fused state.

Pick out the incorrect statement for XeF4

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XeF4 disproportionate violently with water

It is used as fluorinating agent

It has octahedral structure for geometry

It oxidizes I to I₂

The pH of 0.001 N HCl is

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1

2

3

4

The strongest acid is.

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HNO2

HNO3

H2N2O2

HNOS

The most reactive alkali metal among the following is

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Li

Na

Cs

Rb

Which of the following cast iron is heat treated for ductility.

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Gray iron

Malleable iron

White iron

None of these

A colloidal system in which a liquid is dispersed in a solid is called a/an

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Emulsion

Sol

Gel

Precipitate

Which is true for DDT it is.

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Not a pollutant

An antibiotic

A non degradable pollutant

A pesticide

A red color gas, on condensing ti gives a dark blue liquid.

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NO

N2O

N2O3

N2O4

Sodium reacts with excess of oxygen to form

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Na2O

NaO2

Na2O2

NaO

In each period the element with lest electron affinity belongs to.

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Group 1

Group 14

Group 17

Group 18

What ASTM test for shear strength is designated for plastics.

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D 732

D 790

D 695

D 638

The wire of flash bulb is made up of.

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Cu

Ag

Mg

Ba

Which is incorrect statement for Xe F2.

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It has linear structure.

It is hydrolyzed rapidly in aqueous solution of a base

It oxidizes Cl and I to Cl2 and I 2 respectively

It cannot act as F donor

Glucose and fructose react with which of the following reagent to give same product.

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Tollen's reagent

Phenyl hydrazine

Hydroxyl amine

All of these

The maximum absorption in [Ti(OH)2)6 3+ take place at wavelength of.

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4000 A^o

5000 A^o

6000 A^o

10000 A^o

On hybridization of one s and one p orbitals we get.

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Two mutualy perpendicular orbitals

Two orbitals at 180^o

Four orbitals directed tetrahedrally

Three orbitals in a plane

An example of acyclic polytropenoid is

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Myrcone

Buna -S

Synthetic rubber

Natural rubber

Used in TV sets and sound movies to give ready response to electrical potential

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He

Ne

Ar

Kr

To complete transfer of a shared pir of electrons to one of the atoms joined by a double or triple bond at the requirement of an attacking reagent is known as.

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Inductive effect

Resonance effect

Eletromeric effect

Stark effect

The volume of a given mass of gas at constant temperature varies inversely with the pressure. This is a statement of.

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Charlea's law

Avogadro's law

Boyle's law

Dalton 's law

The IUPAC suffix used for ______ NC group is

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Cyanide

Isocyanides

Carbylamines

Nitrite

Select the major product obtained from the addition of HBr to I -Methyl cyclohexene

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1-bromo -2- methyl cyclohexane

6- bromo-i- methyl cyclohex -i- ene

3- bromo -1- methyl cyclohex - 1- ene

I-bromo -I- methyl cyclohexane

The smog is essentially caused by the presence of.

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O3 and N2

O2 and N2

Oxides of sulphur and nitrogen

O2 and O3

Noble gases are sparingly soluble in water owing to.

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Dipole -dipole interactions

Dipole -induced dipole interactions

Hydrogen bonding

Induced dipole -instantaneous dipole interactions

In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is.

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8

16

12

20

The rising world temperature will have serious effect on.

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Agriculture

Animal production

Human being

All above

Water pollution is due to

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Agricultural discharges

Swages and other wastes

Industrial effects

All the above

Which of the following represents the correct order of ionic radii

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La+ < Na+ < K+ < Rb+

Li+ > Na + > K+ >Rb+

Li = Na + = K+ = Rb+

Rb +> Na+> K+ > Li+

In extraction of iron, the furnace charge consists of iron ore, coke and limestone. The function of limestone is to act as.

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An oxidation agent

A reducing agent

Flux

Slag

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