Question # 1

Which reagent is responsible for the conversion of ketone to secondar alcohul

Choose an answer

NaAlH

NaBH4

Al

Red P

All are dicarboxylic acids except

Choose an answer

Oxalic acid

Malonic acid

Picric acid

Tartaric acid

Active sulphonating agent during sulphonation of benzene is

Choose an answer

SO2

SO3

SO3H

SO3+

Which of the following is not a category of proteins based upon their function?

Choose an answer

genetic

Regulatory

nucleo

structural

Areal gas obeying Van der Waal's equation will resemble ideal gas ilf the:

Choose an answer

both a and b are large

both a and b are small

a is small and b is large

a is large and b is small

Acetone reacts with HCN to form a cyanohydrin. It is an example of

Choose an answer

Nucleophilic addition

Electrophilic substitution

Electrophilic addition

Nucleophilic substitution

Elimination unimolecular reactions involve

Choose an answer

Second order kinetics

First order kinetics

Third order kinetics

Zero order kinetics

If ionic product is equal to Ksp then the solution is

Choose an answer

Unsaturatec

Ideal

Supersaturated

Saturated

Real gases deviate at low temperature from ideal behaviour due to

Choose an answer

there is transitional motion of molecule

the collissions between the molecules are decreased

volume of gas is decreased

the inter molecular attractive forces become significant

Which one of the following statements is wrong for gases?

Choose an answer

gases do not have a definite shape and volume

volume of the gas is equal to volume of container confining the gas

confirmed gas exerts uniform pressure on the walls of its container in which it is enclosed

mass of gas cannot be determined by weighing a container in which it is enclosed

Which does not affect vapour pressure

Choose an answer

Nature of liquid

intermolecular forces

Temp

None of these

The standard reduction potential of Zinc is

Choose an answer

0.76V

0.34

-0.34V

-0.76V

A real gas obeying Vander Waal's equation will resemble ideal gas if

Choose an answer

Both a and b are large

Both a and b are small

a is small and b is large

a is large and b is small

Mercury does not wet the glass because of

Choose an answer

repulsion

weak cohesive force

high viscosity

capillary action

When does average rate become equal to instantaneous rate of reaction

Choose an answer

At the start of reaction

time interval is zero

at the end of reactior

time interval approaches zero

2-Propenol, on rearrangement, yields

Choose an answer

Propanal

Propanone

2-propano

Both A and B

At higher temperature isotherm of Boyle's law moves away from both axis, is due to increase in

Choose an answer

pressure

No. of moles

Volume

all of these

How many kinds of space lattices are possible in a crystal?

Choose an answer

23

7

230

14

All gases liquefly before reaching at

Choose an answer

273°K

373°K

0 K

73°C

C-H bond length in the benzene is

Choose an answer

0.99A°

1.09A°

1.12A°

1.34A°

The aliphatic compounds are of two types

Choose an answer

Straight chain and cyclic

Branched chain and alicyclic

Straight chain and branched

Homocyclic and alicyclic

The study of which one of the followings guides to the mechanism of the reaction

Choose an answer

Order of reaction

Rate of reaction

Half-life period of reaction

Rate determining step

A temperature at which two cyrstalline forms of a substances coexist in equilibrium is called

Choose an answer

standard temperature

critical temperature

transition temperature

absolute temperature

Electrolytic products of dilute aqueous solution of sodium sulphate is

Choose an answer

Na. SO2

H2. S02

Na. O2

H2,O2

A graph is plotted, P on x-axis and V on y-axis for a given mass at constant temperature, we shall get:

Choose an answer

a curve with different peaks

a curve called isotherm

straight line parallel to x-axis

a straight line

H₂and O₂are enclosed in porous vessel. The effusion of these gases will take place like

Choose an answer

H₂effuses 4 times the rate of effusion of O₂

O₂effuses into air 4 times the effusion of H₂

both effuse at same rate

H₂effuses at 8 times the rate of effusion of O₂

Charles's law is only obeyed at which temperature scale

Choose an answer

Celsius

Kelvin

Fahrenheit

both A&B

The existence of a substance in more than one solid modification is known as

Choose an answer

Isomorphism

Polymorphism

Amorphism

None of these

Choose an answer

For a chemical reaction in which one of the reactant also act as solvent, the order will be

Choose an answer

First order

Third order

Second order

pseudo-first order

If the number of gas molecules are doubled in the certain volume the pressure is:

Choose an answer

Increased to four times

Remains unchanged

Doubeld

Decrease to half

Which of the following are not known to form compounds in more than one oxidation state?

Choose an answer

Transition metals

Halogens

Alkali metals

Noble gases

Which one of the following molecules show maximum hydrogen bonding?

Choose an answer

H₂O

H₂Se

H₂S

HF

Liquids are less common than:

Choose an answer

Solids.

Plasmas.

Gases.

All of above.

One of the following metals is the most reactive and form super oxide. Indicate that

Choose an answer

Mg

K

Be

Li

During esterifcation, the alcobol molecule acts as:

Choose an answer

Oxidizing agent

Electrophile

Reducing agent

Nucleophile

The relative rate of diffusion of a gas (molecular weight = 128) as compared to oxygen is

Choose an answer

2 times

1/4

1/8

1/2

The temperature of the gas is raised from 27°C to 927°C the root mean square velocity is

Choose an answer

√927/27 times the earlier value

Same as before

Halved

Doubled

Doubling the pressure in a liquid phase reaction

Choose an answer

Will double the rex

Will increase the rex

Will decrease the rex

Will not alter the concentration of reactant

If the volume of 2 moles of an ideal gas at 540 K is 44.8 litre then its pressure will be

Choose an answer

1 atmosphere

2 atmosphere

3 atmosphere

4 atmosphere

Aniline is the derivative of the benzene containing the

Choose an answer

Hydroxyl group

Amino group

Amido group

Imido group

Most reactive among the following

Choose an answer

Li

Mg

Ca

Na

Dipole-dipole interaction are present in the

Choose an answer

atoms of the He gas

molecules of CCl4

molecules of solid iodine

molecules of :NH3

The specie that develops strongest hydrogen bonding with water

Choose an answer

НСООН

B.CH3CH2СООН

CH3СООН

CICH2COOH

Which of the following statement about graphite is not true?

Choose an answer

The coordination number of carbon atoms is 4.

the carbon atoms are arranged layers.

the layers in graphite are attracted to each other weak forces.

the corbon atoms use only three of their four outer electrons for covalent bonding.

Equal masses of methane and oxygen are mixed in an empty container at 25∘C.

Choose an answer

1/3

8/9

1/9

16/17

R = 0.08205:

Choose an answer

atm dm³mol^-1k^-1

J mole^-1k^-1

Nm mol^-1k^-1

cal. mol^-1k^-1

2,4,6-Trinitrophenol is commonly called as

Choose an answer

Phthalic acid

Tartaric acid

Malonic acid

Picric acid

How magnesium reacts with water?

Choose an answer

In frozen ice water

With cold water

In with steam

In hot state

What is the weight of 10 litres of CO₂at 27°C and 2 atm?

Choose an answer

89.3 g

36.1 g

125 g

127 g

The value of oxidation number of chlorine in HCIOs is

Choose an answer

+7

+5

-1

+3

Which of the following does not give flame test?

Choose an answer

Li

Ba

Mg

Sr

The structural isomerism arises due to the difference in the

Choose an answer

Number of atoms in the molecule

Arrangements of atoms in the molecule

Number as well as arrangement of atoms in the molecule

Spatial arrangement of atoms

Which volume of gas has minimum value

Choose an answer

Apparent volume

Actual volume

Excluded volume

All have equal value

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

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

Total number of valence electrons in phosphonium ion (PH4-) is

Choose an answer

8

9

12

10

An ideal gas cannot be liquefied because:

Choose an answer

It solidify before becoming a liquid

Its critical temperature is always above 0^oC

It is molecule are relatively smaller in size.

Forces operative between its molecules are negligible

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

Choose an answer

instantaneous dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

dipole-dipole forces

Half-lives required to convert 100% reactant to produet for a first order reaction are

Choose an answer

10

1000

100

Infinity

Which one of the following is more acidic

Choose an answer

Phenol

Carboxylic acid

Alcohols

Amines