Question # 1

Super conductors are derived from compounds of

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P-block elements

Lanthanides

Actinides

Transition elements

Which of the following formula is correct for density of any gas

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d = RT/PM

d = PM/RT

d = MT/PR

d = RM/PT

Coinage metals Cu. Ag, and Au are the least reactive because they have

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Negative reduction potential

Positive reduction potential

Negative oxidation potential

Positive oxidation potential

Which of the following statements about amorphous solids is incorrect?

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They melt over a range of temperature

They are anisotropic

There is no orderly arrangement of particles

They are rigid and icompressible

Which of the following is not an electrophilic substitutional reaction of benzene?

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Free radical chlorination of benzene

Friedel Craft alkylation

Sulphonation

Nitration

1-chloropropane and 2.chlorpropane are isomers of each other, the type of isomerism in these two is called

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Cis-trans isomerisn

Position isomerism

Chain isomerism

Functional group isomerism

Ozone layer is high:

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20-23 km

22-25 km

23-26 km

25-28 km

Covalent bonds are least likely to be formed:

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between atoms of the same element

between atoms of different elements on the right of the periodic table

by head of the group elements with high ionization energies

between an element in Group I and an element in Group Vll

Thermoplastic polymer can be softened and hardened when cool repeatredly, Which one is not a thermoplastic among he following?

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epoxy resin

PVC

Plastic toys

none of all

Lecithin is an example of:

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A simple lipid

Phospholipids

Waxes

Proteins

Coordination number of Zn and ZnS (Zinc blends) is

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4

6

2

None of these

Sodium phenoxide reacts with CO₂at 400 K and 4.7 atm pressure to give

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Sodium salicylate

Salicyl aldehyde

Catechol

Benzoic acid

The three N - Hσ-bonds are made by

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sp³- s overlap

sp²- s overlap

P - p overlap

sp - overlap

0.5 mole of CH4and 0.5 mole of SO2gases have equal

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Volume

Mass in grams

Total number of atoms

Number of molecules

Alkyle magnesium halides are known as

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Simon-smith reagent

Tollen's reagent

Grignard's reagent

Barford's reagent

Which of the following is the most suitable method for removing the traces of water from ethanol?

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Reacting with Na metal

Passing dry HCl through it

Distilling it

Reacting with Mg

Which one is primary alcohol?

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Buten-2-ol

Propan-2-ol

Butaon-1-ol

2,3-Dimethylhexane-4-ol

Which of the following reacts with chloroform and base to form phenyl isocynaide?

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

The heat contents of all the elements in their standard states are taken to be

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1

2

0

None

Orbitals having same energy are called

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Hybrid orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

When electric current is used to carry out non-spontaneous redox, the process is called

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Hydrolysis

Electrolysis

Decomposition

Neutralization

With increases of 10°C temperature the rate of reactiondoubles. This increase in rate of reactionis due to :

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Decrease in activation energy or reaction.

Decrease in number of collisions between reactant molecules.

Increase in activation energy of reactants.

Increase in number of effective collisions

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