Question # 1

Nylon 6 6 is prepared by the reaction of hexamethylene with

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formic acid

acetic acid

adipic acid

none of these

Troposphere extends upto km:

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0-15 km

10-15 km

15-40 km

Total number of possible chain and positional isomers of butyl alcohol among alcohols are

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Four

Five

Two

Six

Which of the following is a steroid?

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vitamin A

vitamin B

vitamin C

vitamin D

Among the following molecules, which one has coordinate covalent (dative) bond?

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CCI4

CO2

CO

CH4

Air pollution causes

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Acid rain

O₃ depletion

Green House Effect

All

One statement of isomorphism is incorrect

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they have different chemical properties

they have same physical properties

they have same atomic ratio

they have definite geometric shape

Which is not the condition for the formation of smog

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there must be sufficient NO gas

there must be sunlight to help photo chemical reactions to take place

air must be blowing swifty

there must be SO₂in the air

The forces present between the ions and water molecules are called:

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dipole-dipole forces

dipole-induced dipole forces

London dispersion forces

ion-dipole forces

Why a C- C bond breaks by uv light

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Cl is most electronegative

Cl is volatile

C - Cl bond energy is smaller than that of C - H bond energy

uv light provides energy which is sufficient to break C - Cl bond and not C - H bond

Which one of the following statements about melting point of metals is true?

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sodium has a lower melting point than potassium

sodium has a higher melting point than magnesium

potassium has a higher melting point rubidium

lithium has a lower melting point than sodium

Which of the following does not turn Schiff's reagent to pink?

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Formaldehyde

Bezaldehyde

Aceton

Methyl chloride

Which is a mixture of low boiling hydrocarbon

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Natural gas

Petroleum

Wood

Graphite

Which of the following is an example of ketohexose?

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Mannose

Galactose

Maltose

Fructose

The quantum number which describes the shape of the orbital is

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Principle quantum number

Spin quantum number

Azimathal quantum number

Magnetic quantum number

The rate of reaction between two specific time intervals is called

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Instantaneous rate

Average rate

Specific rate

Ordinary rate

The addition of unsymmetrical reagent to unsymmetrical alkene is in accordance with the rule:

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Hund's rule

Markownikov's rule

Pauli's Exclusion Principle

Auf bau Principle

Atoms and molecules can either gain or lose electrons, forming charge particles called:

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Positrons

Photons

Ions

Electrons

Which compound is called a universal solvent?

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H₂O

CH₃OH

C₂H₅OH

CH₃----O---CH₃

The standard enthalpy change in the formation of 1 mole of a compound from its elements in their standard physical states is

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Enthalpy of formation

Enthalpy of atomization

Enthalpy of neutralization

Internal energy change

First atomic theory was put forward by an English school teacher:

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Maxewell

Newton

Sanger

John Dalton

There are 20 amino acids found in protein which is not the property of these amino acids

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They are allα-amino acids

They are all optically active

They have high decomposition point

They are water soluble

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