Question # 1

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

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10

1000

100

Infinity

The %age of nitrogen in urea is:

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46

60

70

80

General formula of carbohydrate is

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C_x(H₂O)_y+x

C_x(H₂O)_y

C_x(H₂O)_y-1

C_x(H₂O)_y+1

The nature of the attractive force in acetone and chloroform are

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dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

instantaneous forces

Macromolecules are classified:

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inorganic

organic

biopolymer

synthetic

The standard electrode potential of hydrogen is arbitrarily taken at 298k is

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1.00volt

0.10 volt

0.00 volt

10.0 volt

Ionic solids with defects,contain

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Equal number of cation and anion vacancies

Interstitial anions and anion vacanies

Cation vacancies only

Cation vacancies and interstitial cations

If rate of diffusion of A is 5 times that of B,what will be the density ratio of A and B?

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1/25

1/5

25

5

Site of land for landfill is selected based upon.

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topography

location of ground

water table

All of these

Formation of Picric acid from phenol needs heating, one possible reason for it is

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acidity of phenol

e- donating nature of-OH

acidity of picric acid

e- with drawing effect of- NO2

Cyclone collector is used to reduce:

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noise pollution

air pollution

water pollution

radioactive pollution

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Neutrons are attracted by nucleus

Neutrons carry out nuclear reactions

Neutrons carry no charge

Neutrons are electromagnetic radiations

Addition of iron fillings to CuSO₄solution caused precipitation of Cu owing to the

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Reduction of Cu²⁺

Oxidation of Cu²⁺

Reduction of Fe

Reduction of Fe³⁺

Which of the following derivative can not be prepared directly from acetic acid

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Acetamide

Acetyl chloride

Acetic anhydride

Ethyl acetate

The hydration energy is the heat evolved when one mole of gaseous ion is dissolved in water. The hydration energy of an ion

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Increases with increase of charge to mass ratio

Decreases with increase of charge to mass ratio

Depends on sign of charge +ve or -ve

Depends upon the solvent

Soil remediation means

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To make it suitable for cultivation of crops

To make it acidic

To make it alkeline

To add manure into it

Matter is defined as any thing which occupies space and:

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Molecules

Mass

Compound

Molecules

Consider the ground state of Cr atom (Z=24). The numbers of electrons with the azimuthal quantum numbers l = 1 and l = 2 are respectively

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12 and 4

16 and 5

16 and 4

12 and 5

Which of the following statements is not correct regarding bonding molecular orbitals?

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Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed

Bonding molecular orbitals have low electron density between the two nuclei

Every electron in the bonding molecular orbitals contributes to the attraction between atoms

Bonding molecular orbitals are formed when the electron waves undergo constructive interference

The detection of functional group is called :

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Numerical analysis.

Qualitative analysis.

Combustion analysis.

Quantitative analysis.

Which is a reagent for Lucas test

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ZnCl₂+ Conc. HCl

Zn

Na

Br

Which one of the following reaction rate is effected by the light

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