Question # 1

When elements of group I react with the elements of group VIA theory form

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Ionic bond

Covalent bond

Polar bond

None

In t-butyl alcohol, the tertiary carbon is bonded to:

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Two hydrogen atom

Three hydrogen atoms

One hydrogen atoms

No hydrogen atoms

Glacial acetic acid freezes to ice like solid at (°C)

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07

17

27

37

An element of the third period (Na to S) is heated in chlorine. The product is purified and then added to water. The resulting solution is found to be neutral. What is the element

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Sodium

Aluminium

Silicon

Phosphorus

When sodium metal reacts with alcohols

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Hydrogen gas evolves

Sodium hydroxide is obtained

Alcohol is reduced

Alcohol is polymerised

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these

K,Ca and Li metals may be arranged in decreasing order of their reduction potential as :

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Li, k, Ca

Ca, K, Li

Li, Ca, K

K, Ca, Li

The empirical formula of a liquid compound is known to be C₂H₄O. What other information is needed to work out its molecular formula?

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The percentage composition of the compound

The relative molecular mass of the compound

The density of the compound

The volume occupied by one mole of the compound

Boiling point of acetic acid is ^oC

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116

117

118

119

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Condensation

Electrophilic substitution

Free radical substitution

Nucleophilic substitution

Which element does not belong to 3d transition series

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Ti

V

Mn

Te

How many structural acid cis-trans isomers are there for dichloroprepe, C₃H₄Cl₂

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3

5

6

7

Ethyl bromide on treatment with alcoholic KOH gives

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Ethylene

Ethanol

Acetic Acid

Ethane

Classical smog occurs in palces of

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Excess SO₂

Low temperature

High temperature

Excess NH₃

When CO₂is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is

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Propane

Propanoic acid

Propanal

Propanol

The e.m value for positive rays maximum for:

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Oxygen.

Nitrogen.

Helium.

Hydrogen.

Which reaction produces a free radical

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SN reaction

Homelytic fission reaction

Heterolytic fission reaction

Addition reaction

When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product

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Na₂CO₃

NaHCO₃

Ca(OH)₂

CaCO₃

Property of transition element is :

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Low m.p and b.p

Parramagnetism

Oxidation state

Low binding energies

When acetamide is hydrolysed by boiling with acid the product obtained is

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Ethyl amine

Ethyl alcohol

Acetic acid

Acetaldehyde

Aldehydes are reduced to :

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Pri-alcohol

Sec-alcohol

Ter-alcohol

All of these

The number of elements in the 4th periods of periodic table is

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8

10

18

32

Formula of acetone is:

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HCHO

CH₃CHO

CH₃OCH₃

CH₃OC₂H₅

The standard EMF of Daniel cell is 1.10 volt. The maximum electrical work obtained from the Daniel cell is

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212.3 kJ

175.4 kJ

106.15 kJ

53.07 kJ

Which of the following elements does not show variable oxidation states?

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Copper

Iron

Zinc

Titanium

The chloride of element Q is hydrolysed by water to form an acidic solution and its oxide reacts with acid to form a salt.

What cold be the element Q

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Magnesium

Aluminium

Silicon

Phosphorus

Which one is the most toxic?

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Carbon

CO

CO₂

SO₂

The atom other than C in a hetrocyclic compound is called as

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Hetroatom

Hetroion

Hetromolecule

Hetroelement

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

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Hund's rule

Markowvikov's rule

Pauli's exclusion principle

Auf ban principle

Use of ethanol as:

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Drink

Solvent and fuel

In beverage

All of these

Benzene is prepared from n-hexane in the presence of catalyst

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Cr₂O₃

Al₂O₃

SiO₂

All above

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