Question # 1

Which of the following compound is no formed according to octet rule:

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KrF₂

XeF₂

XeO₃

SF₆

Pb has inert pair of electrons:

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One

Two

Three

Four

Oxidation of methyl alcohol gives

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Formaldehyde

Acetone

Ester

Acid

Essentialα-amino acids are those which are necessary in the diet

Which one is an essentialα-amino acids

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Alanine

Aspartic acid

Glycine

Tryptophan

Tripple bond is present in

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O₂

H₂

N₂

Cl₂

When ethylene glycol is heated with acidified potassium permanganate, the main organic compound obtained is

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Oxalic acid

Glyoxal

Formic acid

Ethanol

If a reactant or product of a reaction absorbs radiation, then physical method for determining the rate of reaction is

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Spectrometry

Refractometry

Conductivity measurement

Optical method

The active part in a molecule is called

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Hetroatom

Functional group

Chemical bond

Ion

Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to

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The formation of less stable carbonium ion

Resonance stabilization

Larger carbon-halogen bond

The inductive effect

Neutron was discovered by:

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Chadwick.

Bohr.

Rutherford.

Plank.

Hydrolytic coversion of sucrose into glucose and fructose is known as

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Induction

Inversion

Insertion

Inhibition

The term cryoscopy is used for

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Depression of freezing point

Elevation in boiling poing

Lowering of vapour pressure

Osmotic pressure

Of the given alkali metals, the one with smallest size is

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Rb

Cs

K

Na

The wave number of the light emitted by a certain source is 2 x 10⁶m^-1. The wavelength of this light will be

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500 nm

500 m

200 nm

5 x 10⁷m

Boric acid cannot be used:

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An antiseptic in medicine

For washing eyes

In soda bottles

For enamels and glazes

The relative lowering of vapour pressure is equal to the mole fraction of the solute, This law is called

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Henry's law

Raoult's law

Ostwald's law

Arrhenius law

Which woody raw material is used of the manufacture of paper pulp

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Cotton

Bagasse

Poplar

Rice straw

Which of the following species has unpaired electrons in antibonding molecular orbitals

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Ethyl alcohol is industrially prepared from ethylene by

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permanganate oxidation

Catalytic reduction

Absorbing in H₂SO₄followed by hydrolysis

Fermentation

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

Which of the following molecules has a net dipole moments

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CO₂

CS₂

SO₂

CCI₄

Which among the following species has the highest ionization energy?

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Ne

F

Li

B

The value of R(General Gas Constant) is

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8.3134 JK^-1mole^-1

1.987 Cal K^-1Mole^-1

Both a and b

1.987 JK^-1mole^-1

The four bonds of carbon in methane are directed towards the corners of

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Cube

Pentagon

Hexagon

Tetrahedron

In the atmosphere, CO₂is about

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0.01%

0.03%

0.05%

0.09%

Azimuthal quantum number of last electron of ₁₁Na is

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1

2

3

0

In zero order reaction, the rate is independent of :

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Temperature of reaction

Concentration ofreactants

Concentration of products

None of these.

In a heterollytic bond fission reaction

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A molecule of H₂O is formed

A molecule of H₂O is eliminated

A free radical is formed

A positive and a negative ion is formed

Transition metals form complexes due to the participation of partially filled

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f-orbitals

d-orbitals

s-orbitals

p-orbitals

Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is

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Be > Mg> Ca > Ba

Ba > Ca > Mg > Be

Ca > Mg > Be > Ba

Ba > Mg > Ca > Be

Which of the following is a steroid

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Vitamin A

Vitamin B

Vitamin C

Vitamin D

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