Question # 1

Which of the following is not the property of liquid crystal

Choose an answer

anisotropic

isotropic

three dimensional arrangement

fluidity

Image a man is sitting in a room. The room is closed from all sides, no entry no exit of any gas. If the room expands suddenly then:

Choose an answer

he will be frightened

he will feel cool

his blood pressure will decrease

he will feel warmth

The densities of two gases are in the ratio of 1 : 16.The ration of their rates of diffusion is

Choose an answer

16 : 1

4 : 1

1 : 4

1 : 16

Zinc reacts with dilute acids to liberate hydrogen. This is because:

Choose an answer

Zn2+ ion is a powertul osidising agent than H' ion

H+ ion is a powerful oxidising agent than Zn ion

Zn2+ ion is a powerful reducing agent than H' ion

H+' ion is a powerful reducing agent than Zn- ian

H3O+ can't accept a Ip because

Choose an answer

it has positive charge

The central atom is not electron deficient

The shell of oxygen has reached its limit

it already has a coordinate bond

Which of the followings has electronic configuration of Ar in +3 oxidation state

Choose an answer

Sc

Mn

Ti

Zn

All of the following have cleavage planes except:

Choose an answer

molecular crystals

metallic crystals

covanent crystals

ionic crystals

2-Propenol, on rearrangement, yields

Choose an answer

Propanal

Propanone

2-propano

Both A and B

Plaster of Paris is obtained from

Choose an answer

marble

bauxite

gypsum

limestone

Abumins and globulins are defined as

Choose an answer

Derived protein

Conjugated protein

Fibrous protein

Simple Protein

Which of the following statement is correct if the intermolecular forces in liquids A,B and C are in the order A < B < C?

Choose an answer

B evaporates more readily than A

B evaporates less readily than C

A and B evaporates at the same rate

A evaporates more readily than C

Which of the following govern the diffusion of gases

Choose an answer

Dalton's law

Avogadro's law

Graham's law

Newton's law

For an endothermic reaction, enthalpy of reactants

Choose an answer

Is smaller than that of the products

Is greater than that of the products

Must be greater or smaller than that of the products

Is equal to that of the products

By the electrolysis of CuCl2 using inert electrodes of platinum which species is deposited at cathode

Choose an answer

H2

O2

Cu

CI

C=O and C=C bonds are differentiated by

Choose an answer

Hybridization of C-atom

Bond angles

Ammonical AgNO3

Conc. HNO3

Which is the following would have most like an ideal gas at room temperature?

Choose an answer

carbon dioxide

helium

hydrogen

nitrogen

Cl₂is a gas while iodine is a solid due to

Choose an answer

stronger London forces with high polarizability

greater electro negativity of Cl than iodine

stronger dipole dipole forces

iodine is colored while chlorine is colourless

Liquids evaporate at every temperature. When the temperature becomes constant for a liquid, then:

Choose an answer

rate of evaporation is greater than the rate of condensation

the rate of condensation is greater than the rate of evaporation

The rate of condensation and evaporation become equal

it depends upon the nature of the liquid

When 1-butene reacts with bromine, the product formed will be

Choose an answer

1, 3-dihydroxy butane

But-1, 2-diol

1, 3-dihydroxy butan-diol

1,2-dibromo butane

Alcohol is less acidie than phenol due to

Choose an answer

higher ka value

Instability of alkoxide ion

stability of carbocation

Stability of phenol

The original volume of a gas at 0° is 273 cm³at constant pressure, its volume at 273°C becomes

Choose an answer

zero cm³

546 cm³

446 cm³

346 cm³

The compressibility factor of an ideal gas is

Choose an answer

0

1

2

4

For N2: +3H2<--------> 2NH3, if Kc is 1 than value of Kp at 273K would be

Choose an answer

1/22.414

1/(22.414)2

22.414

11.207

In intense electrical field and at a very high temperature matter generally exist in

Choose an answer

Solid state

Plasma state

Liquid state

Gaseous state

choose the best example of diffusion of gases:

Choose an answer

vapour condensing on moist surface

spreading of small from a scent bottle

hot air rising above a candle

bubbling in soda bottle

The correct value of the gas constant R is close to

Choose an answer

0.082 litre-atm K^-1 mol^-1

0.082 litre-atm^-1 K mol

0.082 litre-atm K

0.082 litre-atm^-1 K mol^-1

The mono atomic gas molecules are ______ gas molecules

Choose an answer

Halogen

Zero

Noble

Both b and c

Enzymes consist of

Choose an answer

proteins only

proteins and non-protein parts

fats only

futs and non-fatty components

The B.P. of compound is mostly raised by

Choose an answer

dipole-induced dipole interactions

london dispersion forces

intramolecular H-bonding

intermolecular H-bonding

Which of the following solid is amorphous

Choose an answer

NaCl

diamond

glass

MgO

Pyridine is an example af

Choose an answer

Homocyclic compound

Heterocyclic compound

Carbocyclic compound

Aliphatic compound

Which order of vapour pressure in the following liquids is correct

Choose an answer

water > ethanol > acetone > ether

ether > acetone > ethanol > water

ether > ethanol > acetone > water

water > ether > acetone > ethanol

lonization of KCIO3. is suppressed by

Choose an answer

Increasing temperatuse

adding KCl

adding NaNO3

Decreasing temperature

Choose the example having hexagonal system:

Choose an answer

graphite

sugar

sulphur

diamond

Molten lead and iead (II) bromide both conduct electricity. Which one of the following statements relating to this is true?

Choose an answer

Both undergo chemical change when they conduct

Both conduct by the movement of charge particles

Both will also conduct in the solid state

Both contain mobile electrons

Amount of product formed increases with time, this statement is true for reactions-------with kinetics

Choose an answer

1s order

3rd order

zero order

Any order

The stoichiometric calculations for a chemical reaction results in

Choose an answer

Actual yield

Percentage yield

Theoretical yield

Selectivity

A molecule which contains two lone pairs and two bond pairs of electrons in valence shell of central atom, geometrical shape of molecules will be

Choose an answer

Tetrahedral

Trigonal pyramidal

Angular

Linear

2-propanol on oxidation yield

Choose an answer

Propionaldehyde

Propanone

Propanal

Butanal

When liquid solute is dissolved in liquid solvent, then the best unit of concentration is?

Choose an answer

% W/W

% W/V

% V/V

%V/W

What types of bonds are broken when water turns into steam on heating?

Choose an answer

covalent

permanent dipole interactions

hydrogen bonds

induced dipole interactions

The number of moles of CO2 which contain 16g of oxygen

Choose an answer

0.25

1.00

1.50

0.50

The gases law describe the ______ Behaviour of gases

Choose an answer

Variable

Constant

Uniform

Best

Boiling point of H₂O is higher than that of HF although F is more electronegative than O. It is due to

Choose an answer

stronger dipole dipole forces in H₂O

H₂O is neutral HF is acidic

H₂O is angular, but HF is linear

number of hydrogen bonds more in H₂Othan in HF

Which of the follwing dnes not give brick red precispitate wits Fehling's solution

Choose an answer

Acetaldehyde

Formalin

prorionaldehyde

Acetone

When calcium formate and calcium acetate are dry heated they form

Choose an answer

НCOOH

C2H5OH

CH3CHO

HCHO

Which of the following is pseudosolid?

Choose an answer

CaF₂

Glass

NaCl

All

The kinetic energy of 4 moles of nitrogen gas at 127°C is? cals.(R = 2 cal mol^-1 K^-1)

Choose an answer

4400

3200

4800

1524

The major binding force of diamond,silicon and quartz is

Choose an answer

Electostatic force

Electical attraction

Ceobalent bond force

Non convalent bond force

What s the boling point of H2O at the peak of Mount Everest?

Choose an answer

101 C°

69°C

100 C°

98° C

The non polar gases of low polarizability have a very:

Choose an answer

Low critical temperature

Stable critical temperature

High critical temperature

Halogens form halogen acids. HF is the weakest among all of them This is due to the reason that

Choose an answer

fluorine is a very small-sized atom

fluorine is highly electronegative atom

there is strong hydrogen bonding in HF

the polarity of HF bond is less

What is not true for NH4CI

Choose an answer

It has ionic bond

It has covalent bond

It has coordinate bond

It has hydrogen bond

Which of the following pair has the same no. of electrons in d- subshell

Choose an answer

Sc+3,Ti+3

Mn+2,Fe+3

Ti+3,V+3

Cr+3.Co+2

Considering the physical properties of the gases, which of the following statements about particles of gas is not true. The particles

Choose an answer

orderly arranged

randomly moving

having wide spaces

causing pressure

NH₃shows a maximum boiling point among the hydrides of Vth group elements due to

Choose an answer

very small size of nitrogen

hydrogen bonding between its molecules

enhanced electronegative character of nitrogen

pyramidal structure of NH₃

The ratio of most probable velocity to that of average velocity is

Choose an answer

π/2

2/π

√π/2

The electrochemical series is based on

Choose an answer

pH scale

Redox scale

Hdrogen scale

Arrhenius scale

How magnesium reacts with water?

Choose an answer

In frozen ice water

With cold water

In with steam

In hot state

The most abundant protein in the human body is

Choose an answer

Collagen

Keratin

Myosin

Albumin

A compound z' decolorizes bromine water and produces white ppt. The compound 'z'is

Choose an answer

Alkane

Alcohol

Phenol

Benzene