Question # 1

An organic compound 'A' has the molecular formula C₃H₆O, it undergoes iodoform test. When saturated with HCl it gives 'B' of molecular formula C₉H₁₄O. A and B, respectively are

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Propanal and mesitylene

Propanone and mesityl oxide

Propanone and 2, 6-dimethyl-2,5-heptadien-4-one

Propanone and mesitylene oxide

Primary carbon attaches with other hydrogen atoms directly:

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One

Two

Three

At least one or more than it

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Zero

253 sec

150 sec

500 sec

0.1 molar glucose (C₆H₁₂O₆) solution has the % W/N

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1.8%

18%

0.18%

2.8%

Which three elements are needed for the healthy growth of plants

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N, S, P

N, Ca, P

N, P, K

N, K, C

The concentration units independent of temperature would be

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Normality

Mass-volume precent

Molality

Molarity

The cell which generates electricity as a result of spontaneous oxidation-reduction reaction is called

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Electrolytic cell

Nelson's cell

Galvanic cell

Down's cell

A suitable solvent should dissolve maximum amount of solute at its boiling point and minimum amount at :

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Freezing point.

Room temperature.

Boiling point.

Sea level temperature.

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

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

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3

5

6

7

Atoms obey octet rule by sharing-electrons making covalent bonds according to

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Lewis and Kossal theory

Valance bond theory

VSEPR theory

Molecular orbital theory

CO+ is an example of

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Stable molecule

Anionic molecule ion

Cationic molecular ion

Free radical

Which statement about the following equilibrium in correct?

2SO_{2 (g)}+ O_2(g)---------------2sO_3(g)H= - 188.3 KJ mol-1

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T value of K_{p falls witha rise in temperate.}

The value of K_{p falls withincreasing pressure}

Adding V_2O₅catalyst increase the equilibrium yield of sulfur trioxide

The value of K_{p is equal to}K_p

Which of the following compounds contains the highest percentage by mass of nitrogen?

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Ammonia, NH₃

Ammonium carbamate, NH₂CO₂NH₄

Ammonium carbonate, (NH₄)₂CO₃

Hydrazine, N₂H₄

The rate of reaction between two specific time intervals is called

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Instantaneous rate

Average rate

Specific rate

Ordinary rate

The oxidation state of an element is zero when

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It forms an oxide

It forms hydride

It is in free state

Only for noble gases

When of the following is isolelectronic with krypton

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Ca⁺⁺

Al⁺⁺⁺

Br^-1

I^-1

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The molal elevation constant is the ratio of the elevation in boiling point to

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Molarity

Molality

Mole fraction of solute

Mole fraction of solvent

Compounds having the same molecular formula, but different functional groups show

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Metamerism

Position isomerism

Chain isomerism

Functional group isomerism

Standard reduction electrode potential of three metals A, B and C are erespectively + 0.05 V, -3.0 and -1.2V. The reducting power of

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B > C > A

A > B > C

C > B > A

A > C > B

In ter-butyl alcohol, the tertiary carbon is bonded to

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Two hydrogen atoms

Three hydrogen atoms

One hydrogen atoms

No hydrogen atom

Which of the following is not fatty acid?

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

CL₂, N₂ and O_{2 are:}

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Diatomic molecules

Hetero atomic molecules

Poly-atomic molecules

Mono-atomic molecules

The substance having highest conductivity at room temperature among the following is

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0.1 N HCl

0.1 N NaCl

Graphite

Glass

Identify the compound which has a bond angle of 109.5°

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Ethyne

Ethere

Methane

Benzene

Which of the following compounds gives a ketone with Grignard's reagent?

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Formaldehyde

Ethanenitrile

Ethyl alcohol

Methyl iodide

The reaction rate is expressed in the units of

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mol dm^-3S^-

mol dm^-3

mol dm^-3N^-

dm^-3S^-

Phenol was discovered by:

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Hofmann

Runge

Henderson

Bakelite

The elimination of HX from adjacent carbon atoms is called

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Halogenations

Hydrohalogenation

Dehydrohalogenation

Hydration

Which one of the following is (m-xylene)

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1,2 dimethyl benzene

1,3 dimethyl benzene

1,5 dimethyl benzene

1,4 dimethyl benzene

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