Question # 1

Propanoic acid is functional group isomer of

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Methyl acetate

Ethyl acetate

Propanal

Proparone

Which of the following compound have empirical formula, but no molecular formula

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H20

C6H6

H₂O₂

NaCl

The molecules of CO2, in dry ice form the

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covalent crystals

molecular crystals

none of these crystals

ionic crystals

Which one is not postulated in the kinetci molecular theory among the following?

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molecules are in chaotic motion

molecules of all the gases have same size and same mass

the volume of the molecules is negligible

all molecular collisions are elastic

Which of the following equation is for idea gas:

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PV = dRT

PR = nTP

PM = nRT

PV = nRT

H₂O is liquid at room temperature whereas H₂S is a gas because

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H₂O used as drinking water, but H₂S has rotten egg smell

H₂O is neutral. H₂S is a weak acid

stronger hydrogen bonding in H₂O than in H₂S

H₂O occurs abundantly than H₂S

Atoms having same mass number but different atomic numbers are called.

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Isotopes

isobars

Isotones

isomers

Which of the following may be called as London dispersion forces?

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instantaneous dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

dipole-dipole forces

When the concentration of product is increased the instantaneous rate of reaction with reference to reactants will be

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Positive

Negative

the same

falling curve

Rusting of iron is the example of

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Fast

Slow

moderate

depends upon conditions

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

Zine does not show variable oxidation state, because

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Its d-subshell is incomplete

Its d-subshell is complete

It is relatively soft metal

It has two electrons in outermost shell

The most unsymmetrical one in crystal system is

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triclinic

Li, Na, K

monoclinic

hexagonal

In an elimination reaction a more substituted alkene is formed due to the stability associated with

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Free radical

transition state

Activated complex

Carbocation

The value of van der Waal s constant a for gases CO₂, N₂, and SO₂, are 3.59 ,1.39, 1.36, and 6.17 atm dm⁶ mol^-2respectively the gas which can be most easily liquefied is

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CO₂

O₂

N₂

SO₂

The pH of ideal buffer is

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10

7

Less than 7

0

Greater shielding effect corresponds to ionization potential value

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greater

lesser

remain same

no effect

In diamond, which hybridization is there?

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sp2

dsp2

sp3

sp

Which volume of gas has minimum value

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Apparent volume

Actual volume

Excluded volume

All have equal value

Acetone and Chloroform are soluble in each other due to

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intermolecular hydrogen bonding

ion-dipole interaction

instantaneous dipoles

dipole-induced dipole interaction

NaNO₃and CaCO₃crystals are Rhombohedral isomrophism is due to

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both soluble in water

their cations belong to S block element

same shape of NO₃^-1and CO₃^-2ions which is triangular planar

same number of O atoms

Which of the following is not molecular crystal

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Sugar

Iodine

Ice

Graphite

When two ice cubes are pressed together they unite to form one cube. Which of the following forces is responsibles for holding them together

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Van der Waal's

covalent bonding

hydrogen bonding

dipole-dipole interaction

If the volume term is present in denominator of Kc expression, then which one is correct

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Increase in pressure will shift the reaction backward

Increase in pressure will shift the reaction forward direction

Decrease in volume will shift the reaction forward direction

Reaction will not effected

The deviation of a real gas from ideal behaviour is maximum at

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-10.0°C and 50 atm

-10°C and 2 atm

100°C and 2.0 atm

0°C and 2 atm

Equal volumes of ideal gases contain equal number of molecules at:

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Same temperature

Same pressure

Same environmental conditions

Both (A) and (B)

Which is the correct order of boiling points

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structure of ice

solution of ethanol in water

solution o fNaCl in benzene

linking of helix protein molecule

Which element of group V-A and VII-A does not use d-orbital?

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Nitrogen

Sulphur

Arsenic

Chlorine

A transition element X has a configuration [Ar) 4s3dd in its +3 oxidation state. Its atomic number is

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25

26

22

19

Which of the following gases have lowest density at room temperature

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CO

N₂

Ne

NH₃

consider the physical properties of the gases. Which of the following statements about particles of gases is incorrect? The particles are:

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causing pressure

having wide spaces

orderly arranged

randomly moving

The number of atoms or molecules whose concentrations determines the rate of a chemical reaction is called the

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Molecularity of the reaction

specific activity of the reaction

Order of the reaction

rate constant of the reaction

Among the following the polycyclic aromatic compound is

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Styrene

Naphthalene

Toluene

Acetophenone

lonic bond is produced after complete transfer of

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nucleus

neutrons

electrons

protons

NaCI has face centered cubic structure. The Na ion at the face of the unit cell is shared by

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2-unit cells

4-units cells

only one unit cell

8-unit cells

What is the formula of silica?

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Si2O3

SiO2

Si3O4

SiO-

The starting substance for the preparation of iodoform is any of the following, except

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СН3СН(ОН)CН3

CH3CH2ОН

HCH2OH

CH3COCH3

Ethene can give all of the following reactions except

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Addition

Free radical substitution

Hydrohalogenation

Hydration

Group of element belongs to IIB group

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Zn. Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

The oxidation state of transition elements is usually

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Variable

Single

Constant

Infinite

The boiling point of glycerin at 1 atmospheric pressure is:

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290°C

390°C

190C°

210°C

.Both aldehydes and ketones are planar to the neighborhoods of carbonyl (C-0) group. Which one of the following bonds is distorted towards the oxygen atoms?

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pi-bond of C and O

Sigma bond of C and O

Sigma bond of C and H

Sigma bond of C and C