Question # 1

[Zn(NH₃)₄]³⁺possess geometry

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Square plannar

Hexagonal

Tetrahedral

None of these

Coordination number of Pt in [Pt Cl(NO₂) (NH₃)]^2-is

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2-

4

1

6

The statement that the properties of every eight elements are similar to the first is the law of

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Dobereiner

Newland

Mendeleev

L. Meyer

De halogenatiion of tetrahalides happens in the presence of active metal like

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Zn

Mg

Both a and b

None of them

The characteristic reactions of alkanes are

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Addition reactions

Substitution reactions

Condensation reactions

Polymerization reactions

Mercury is the only metal which is liquid at 0°C. this is due to its

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Very high ionization energy and weak metallic bond

Low ionization potential

High atomic weight

High vapour pressure

Ethyl alcohol on oxidation with K₂Cr₂O₇gives

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Acetic acid

Acetaldehyde

Formaldehyde

Formic acid

All the elements of oxygen family are

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Non metals

Metalloids

Radioactive

Polymorphic

Fluorine molecule is formed by

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The axial p-p overlap

The sidewise p-p overlap

The axial s-p overlap

The overlap of two sp²hybrid orbitals

The decrease in radius in large for:

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Monovalent ions.

Trivalent ions.

Divalent ions.

Atoms.

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Temperature is increased

Pressure is increased

HCl is added

HCl is removed

Denaturation of protein means the structure of protein is disrupted, indicate which factor foes not denature protein

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Heating protein

pH changes

Oxidising agent

Keeping pH 7.35

Treatment of a secondary alcohol with a suitable oxidizing agent (K₂Cr₂O₇) results in the formation of

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Ketone

Aidehyde

Ether

Alkyl halide

Formic acid is obtained when

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Calcium acetate is heated with conc.H₂SO₄

Calcium formate is heated with calcium acetate

Glycerol is heated with oxalic acid

Acetaldehyde is oxidized with K₂Cr₂O₇and H₂SO₄

One of the following statements is incorrect

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Actual yeild is always less than the theoretical yield

The formula of a compound is not definite

Law of conservation of mass is applied in stoictiometry

Boyles law is applied in stoichiometry

Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively

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Zinc dust and soda lime

Soda time and zinc dust

Zinc dust and sodium hydroxide

Soda lime and copper

n + l value for 4f will

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2

5

7

9

The force which holds the atoms together to form a compound is called

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A chemical bond

Van der waal's force

Dispersion force

London force

Which of the following undergoes uncleophilic substitution exclusively by S_N1 mechanism?

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Benzyl chloride

Ethyl chloride

Chlorobenzene

Isopropyl choride

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Total pressure

Amount of A₂and B₂

Temperature

Catalyst

Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as

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Wurtz reaction

Frankland's reaction

Cannizaro reaction

Kalobe's reaction

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

Which of the following polymers is used for weather resistant paints

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Arcylic resins

Polyvinyl acetate

Polystyrene

PVC

The reagents like KMnO_{4 and HCL cannot be filtered through Gooch crucible if its base is covered with :}

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Butterfly paper.

Ordinay paper.

Flying paper.

Filter paper.

In carboxyl group the bond between C and oxygen is:

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Sigma bond

Single bond

Double Bond

Triple bond

Potassium superoxide has a use in breathing equipment in space crafts. The balanced equation for the reaction is

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Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

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Ozone

Nitrous oxide

Sulphure dioxide

Carbon monoxide

The quantum number which determines the shape of the orbital is

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principal

azimuthal

magnetic

spin

X-ray work has shown that the diameters of atom are of the order of

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8 x 10^-10m

2 x 10^-10m

8 x 10^-8m

2 x 10^-8m

During the formation of a chemical bond the potential energy of the system

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Decreases

Increases

Does not change

None of these

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

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