Question # 1

Alcohol is less acidie than phenol due to

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higher ka value

Instability of alkoxide ion

stability of carbocation

Stability of phenol

A fat or oil is characterized for extent of unsaturation by one of the following number. Which one is:

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acid number

saoilucfucation umber

rancidity number

iodine number

For a chemical reaction to occur

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The vessel shall be open

Reacting molecules should have less energy than Ea at time of collision

Reacting molecules must be properly oriented and energy more than or equal to Ea

The reacting molecules must not collide with each other

Amino acids are building material of:

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lipids

protein

carbohydrates

fats

The word "Lipids" derived from the language

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Greek

Latin

German

English

Primary structure of proteins refers to

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Coiling and folding in form of specific structure

Number of amino acids in a chain

3d structure

Alpha and Beta sheets

Ethyl alcohol reacts with PCL and produces:

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Haloalkane

Alkyl halide & H3PO3,

Alkyl halide & POCl3

Alkyl halides &H3PO4.

Ethane nitrile can be converted into ethanoic acid through......intermediate

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Ethyl alcohol

AcetyI chloride

Acetamide

Methyl cyanide

Which of the following has no hydrogen-bonding

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Diethyl ether

Water

Ethyl alcohol

Phenol

Which element differs from rest of elements of its group?

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Ba

Mg

Ca

Be

Which of the following bonds is not present in NH4CL

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lonic bond

Covalent bond

Co-ordinate covalent bond

De-localized covalent bond

Which woody raw material is used for manufacture of paper pulp?

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Cotton

Bagasse

Popular

Rice straw

Which one of the following statements of glucose and sucrose is incorrect?

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Both are soluble in water

Both are naturally occuring

Both are carbohydrates

Both are disaccharides

Which one of the following step is not involved in determination of empirical formula

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Determination % of each element

Determination of gram atom of each element

Determination of isotopes of each element

Determination of atomic ratio of element

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

Ascorbic acid is a chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B₆

Bohr model of atom is contradicted by:

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Planck's quantum theory

Pauli's exclusion theory

Heisenberg's uncertainty principle.

All of above.

The substance which is present in large quantity is called a :

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Solute

Solvent

solutiion

None of Above

A solution has pH = 0, its H⁺ion concentration is

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1 x 10^-14

1 x 10¹⁴

1 x 10¹

1

The relative abundance of the ions with a definite m/e value is measured by

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High pressure of vapours

Strength of electric current measured

Quantity of fast moving electrons

Electron gas

Organic compounds are soluble in all except

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Benzene

Petroleum

Ether

Water

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Q and R Q and R

R only Q and R

Q and R R only

Q only R only

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