Question # 1

Lactoglobulin is found in

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nucleus

nerve cells

Plants only

muscles and in plants

If a = b = c and x = y = z 90° then crystal structure is

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Cubic

Tetragonal

Orthorhombic

Triclinic

In a crystal a ≠ b ≠ c,a = y 90° and β ≠ 90° it is

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Monoclinic

Rhombic

Trigonal

Tetragonal

In beta elimination reaction

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carbon number changes

unsaturated compound is formed

hybridization. ofC remains same

pi bonds are decreased

Which of the following element will have strongest van der Waal force of attraction between its molecules?

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nitrogen

hydrogen

oxygen

chlorine

Which one of following statement about three about three states of matter is incorrect?

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in solids the particles vibrate about fixed positions

energy is released when a gas turns back to a liquid

particles in gases move in a random manner

the closer particles are together, smaller the force of attraction between them

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

The angle between the unhybridized 2pz orbital and the three sp2 hybrid orbitals in ethene is

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180°

120°

90°

60°

The Complete oxidation of ethanol produces first Ethanal than

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Ethanal

Propanone

Ethanoic acid

Benzoic acid

The structural isomerism arises due to the difference in the

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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

The unit of pressure ______ is commonly used by meteorologists

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mm of Hg

Kilopascal

Millibar

Pound per square inch

Abumins and globulins are defined as

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Derived protein

Conjugated protein

Fibrous protein

Simple Protein

The solubility product of AgCl is
2.0 x 10(-10) mol2 dm(-6). The maximum concentration Ag+ ions in the solution is:

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1.41 × 10(-5) mol. dm(-3)

1.41 × 10(-10) mol. dm(-3)

2.0 × 10(-10) mol. dm(-3)

4.0 × 10(-20) mol. dm(-3)

Keeping in view different factors which affect the melting point of a substance.the compound having melting point among the following is:

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LiCl

NaCl

CsCl

RbCl

The mono atomic gas molecules are ______ gas molecules

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Halogen

Zero

Noble

Both b and c

The molecules of CO2, in dry ice form the

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covalent crystals

molecular crystals

none of these crystals

ionic crystals

The structure of sodium chloride is

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simple cube

body centered cubic

face centered cubic

depends upon conditions

What are the S.I. units of excluded volume "b" in Vander Waal's equation

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dm³mol^-1

m³mol^-1

mol dm^-3

mol m^-3

Glucose is converted into ethanol by the enzyme present in the yeast

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Urease

Zymase

Invertase

Sucrase

For an ideal gas, number of mole in terms of its pressure P, temperature T and gas constant is

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PT/R

PRT

PV/RT

RT/P

NaOH+HCI- NaCI+ H2O. Enthalpy change in the above reaction is called

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Enthalpy of reaction

Enthalpy of Neutralisation

Enthalpy of formation

Enthalpy of combustion

Ethene can give all of the following reactions except

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Addition

Free radical substitution

Hydrohalogenation

Hydration

The partial pressure of gas can be calculated if we know total pressure of mixture and:

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Number of protons

Number of electrons

Number of neutrons

Mole fraction of gases

Asbestos is commonly used in making

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wall board

black board

soft board

hard board

The molar volume of CO₂ is maximum at:

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S.T.P. (0^∘C and 1 atm)

127^∘C and 1 atm

0^∘C and 2 atm

273^∘C 2atm

By increasing temperature,the transition from a gas to an ionized gas gives free electrons called:

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UV radiation

gas phase

plasma

vapour density

Which isomer of C4H9Br will produce 2-methyl propane-2-ol on treatment with aqueous KOH

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n-butyI bromide

Sec-butyI bromide

Isobutyl halide

Tertiary butyl chloride

An element that is not an essential par of proteins is

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O

N

H

S

Which one of following property is not true about alkali metals?

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Strongest bases due to their hydrides

Low ionization energy

Oxidation number more than +1

Form acidic oxides

2-propanol shows-----isomerism with 1-propanol

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Chain isomerism

Positional isomerism

Metamerism

Geometrical isomerism

Enthalpy of neutralization (∆H°n) per mole of H2SO4/ Ba(OH)2 is

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+57.4 kJmol-1

-114.8 kJmol-1

-57.4 kJmol-1

In which one of the following does the central atom not possess an 'octet' in its outer shell?

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BH₃

CH₄

NH₃

H₂O

Which one of the following is not an alicyclic compound?

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Cyclohexene

Cyclohexane

Benzene

Cyclopentane

Carboxylic acid is more acidic than phenol because of the greater stability of

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Carboxylic acid

Phenoxide ion

proton

Carboxylate ion

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

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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

Coinage metals Cu, Ag and Au are the least reactive because they have

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Negative reduction potential

Negative oxidation potential

Positive reduction potential

Positive oxidation potential

The enzymes that bring about exchange of functional groups like phosphate are called

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Ligases

Lyases

Isomerases

Transferases

Boyle's law does not fall even:

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Temperature is extremely high.

Pressure is extremely high.

Mixture of gases is taken.

All of above.

General gas equation is combination of

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Boyle s law

Avogadro s law

Charles s law

All of these

When we dissolve 15.8 g of KMnO4 in 1000g of H20. The solution is

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, 0.1 M

0.1 M

0.2 M

The B.P of H2O at Murree Hills is

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99.8C

98°C

100C°

89°C

Glucose and fructose are isomers

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Chain isomers

Position isomers

Functional group isomers

Metamers

What will be the pH of 1.0 mol dm-3 of NH4OH, which is 1% dissociated

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2

12

0

2.7

Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is

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same as that of a hydrogen molecule

half that of a hydrogen molecule

two times that of a hydrogen molecule

four times that of hydrogen molecule

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

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First order

Third order

Second order

pseudo-first order

The process of effusion is best understood by law

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Grahams

Boyle s

Charles s

Avogadro s

Vapour pressure of a substance does not depend upon:

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physical state of matter

temperature

intermolecular forces

surface area

Which of the following compound shows the geometrical isomerism

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2-butene

2-butyne

2-butanol

Butanol

Stronger the intermolecular forces

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Lower the Vapour pressure

Greater the Vapour pressure

May be smaller or greater

None

All the following statements are incorrect except:

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all of the gases cannot be liquefied

increase of pressure will not decrease the inter molecular distance in a gas

gas molecules do not attract each other at very low temperature

actual volume of a gas is not negligible at very pressure

Liquid hydrocarbon is

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methane

propane

ethane

hexane

Enzymes have been classified on the basis of

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protein structure

prosthetic groups

type of reaction they catalyse

bonding in them

Stability of Cu-metal is due to filled of d-orbital

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Half

Completely

Partially

Quarterly

Water has high boiling point which is due to

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weak dissociation

hydrogen bonding

high specific heat

high dielectric constant

One kilo calorie is equal to

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4.184J

1000J

4184J

1kJ

Ar has low critical temperature and pressure due to its

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small size

monatomic molecule

low polarizability

liquefaction temperature close to room temperature

Amorphous solids

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have sharp melting points

undergo clean cleavage when cut with knife

have perfect arrangement of atoms

can possesses small regions of orderly arrangements of atoms

Solids in which atoms, ions or molecules are not regularly arranged are

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crystalline solid

amorphous solids

liquid crystals

low melting points

Which of the following is not the application of plasma

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Fluorescent light bulb

Removal of hazardous chemical

Neon signs

Corrosion effective

Which one is best buffer those have

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pH = pKa

pH > pKa

pOH < pKb

pKa =0

Benzene in the presence of AICl3 produces acetophenone when reacts with

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AcetyI chloride

EthyI benzene

Acetic acid

Ethanoic acic