Question # 1

Macromolecules are classified:

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inorganic

organic

biopolymer

synthetic

In a group, the atomic radii from top to bottom

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increase

decrease

don't change

show variable trend

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

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Atmosphere

Lithosphere

Hydrosphere

Biosphere

Plastic toys are

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Copolymer

Thermoplastic polymer

Thermosetting polymer

Homopolymer

A crystal system in which all three angles and all three edges are different is called

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triclinic

rhombohedral

cubic

hexagonal

Which pair of the gases doesn't obey Dalton's Law of partial pressures

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H₂and O₂

N₂and O₂

H₂S and H₂

NH₃and HCl

Mathematically, Boyle's law is indicated as:

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VT = K

PT = K

PV = K

None of these

In dilatometric method is directly proportional to extent of reaction

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Change in concentration

Change in pressure

Chang in volume

Change in temperature

The enthalpies of all elements in their standard states are

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Unity

always +ve

always -ve

zero

Which of these polymers is a synthetic polymer?

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animal fat

starch

cellulose

polyester

Which of the following is not a charbohydrate

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Nuclic acid

Starch

Glycoyen

Cellulose

All reactions occur in :

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A single step.

A series of steps

Two steps.

Both (a) and (b)

Which of the following groups will increase the acidity of phenol?

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-NO₂

-CN

-X (halogens)

All

Direct conversion of solid into vapors is called :

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Crystallization

Sublimation

Obligation

Vaporization.

The total number of transition elements is:

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10

14

40

50

Corrosion reaction are

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Spontaneous redox reaction

Non-spontaneous acid-base reactions

Spontaneous acid-base reactions

None of these

Which of the following statement is incorrect about SHE(Standard hydrogen electrode):

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Reduction potential of Cu⁺² is smaller than H⁺ions whenit is coupled with copper electrode.

gas is passed in it at 1 atm pressure.

Its oxidation potential and reduction potential is zero.

It is made of platinum wire dipped in HCl solution

Molecular orbitals are filled with the available electrons according to:

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Hund's of rule.

Pauli's exclusion principle.

Aufbau principle.

All of above.

A reaction in which heat is given out is

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An endothermic reaction

An exothermic reaction

A thermochemical reaction

An energetic reaction

P₂O₅is heated with water to give

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Hypophosphorus acid

Phosphorus acid

Hypophosphorus acid

Orthophosphorus acid

Spectrum of white light is continuous becuase

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Colors separated by dark spaces

There are no boundary lines between the colours

The radiations are in infrared region

The radiatins fall in ultraviolet region

Rosenmund's reduction of an acyl chloride gives

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An aldehydes

An alcohol

An ester

A hydrocarbon

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