Question # 1

The ionization energy

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generally increases from left to right in a period

increases from top to bottom in a group

does not change in a period

does not change in a group

The ionization energy of hydrogen atom is

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Zero

131.3kJmole

13.13kJ/mole

1313kJ/mole

During the nitration of benzene the nitrating agent is

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NO3

NO2+

NO2-

HNO3

One of the following is not a biopolymer. Point out that one

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Lipid

Starch

Diamond

Protein

Ethanol reacts with sodium metal to liberate

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CO2 gas

CO gas

H2 gas

Steam

Sea gets polluted bu accidental oil spills and

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Atmospheric pressure

Nitrogen gas

Cargo oil tankers

Aero plane

Air pollution causes

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Acid rain

O₃ depletion

Green House Effect

All

Which Henderson equation is not correct?

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pH= pKa +log [ salt/acid]

pH = pKa - log [ salt/acid ]

pH= pKa - log[ acid/salt ]

Pka = pH - log [ salt/acid ]

Which value is designated as absolute zero or zero of the Kelvin scale?

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-273.15°C

-173.15°C

273°C

none of these

During combustion analysis, which one is used for absorbing carbon dioxide:

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50% KOH

5% KOH

Mg(ClO4)2

Silica gel

Choose the correct statements

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SO₂affects the nucleus

SO₂affects plasmodesmata

SO₂affects cell wall

SO₂affects all membrane systems

The order of reactivity of halogen acids towards alkenes

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HCl > HBr > Hl

HBr > HCl > HI

HCl > HBr

HI > HBr > HCl

Eletronegativity difference in C-C bond in alkanes is:

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Zero

Double

Half

4.0

Which of the following factors will favour the reverse reaction in a chemical equilibrium?

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Increase in concentration of one of the reactants

Increase in concentration of one of the products

Removal of one of the products regularly

None of these

K_avalue of HF acid is 6.7 x 10^-15the acid is a

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Weak acid

Moderately strong acid

Strong acid

Very weak acid

Which of the following pair contains isomers of each other

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Propanoic acid and propanone

Acetone and acetaldehyde

Ethyl alcohol and diethyl ether

Methyl alcohol and dimethyl ether

Polymer found by the combining of three different monomers is called:

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Homopolymer

Copolymer

Ter polymer

Thermoplastic polymer

Partial pressure of a solution component is directly proportional to its mole fraction. This statement is known as

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Henry's law

Raoult's law

Distribution law

Ostwald's dilution law

The ionic product of H⁺ions and OH^-in water is called ionization constant of water Kw. The value of Kw at 25°C is

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0.11 x 10^-14

0.30 x 10^-14

1.0 x 10^-14

3 x 10^-14

Energy of electron in the infinite Bohr orbit of H-atom is

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0 KJ/mole

1 KJ/mole

-1 KJ/mole

-1313.32 KJ/mole

Chemical equilibrium involving reactants and products in more than one phase is called

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Static

Dynamic

Homogeneous

Heterogeneous

The word paper is derived from the name of which reedy plany

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Rose

Sun flower

Papyrus

Water hyacinth

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