Question # 1

The value of R (Rydberg's constant) is _______ m-1

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1.0974 x 107

1.0842 x 107

1.082 x 10-7

Both a and b

The orbital in Rutherford's model is

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Spiral

Circular

Both

None

In which of the following theories the hybridizationis considered

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Vsepr

Lewis

Molecule orbital

Valence bond

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0.073

0.147

0.05

0.026

The atomic number of an element is 35 what is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

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6

11

17

23

When a weak acid is dissolved in water or a weak base dissolved in water, then in both cases the conjugate acid base pair is produced. The ionization constants K_aand K_bof a pair are related with each other as

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K_a= K_b

K_a. K_b= K_w

K_a. K_w= K_b

K_b. K_w= K_a

At what pH glycine shows the structure H_3N⁺-- CH₂-- COOH

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2

7

10

14

Splitting of spectral lines when atoms are subjected to strong electron field is called

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Zeeman effect

Stark effect

Photoelectric effect

Compton effect

In which type of following solutions the total volume of solutions may not be necessarily equal to sum of volumes of solute and solvent ?

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Percentage volume/volume

Percentage volume/weight

Percentage weight/volume

Percentage weight/weight

Which of the following statement about fluorine is not correct?

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Electron affinity of chlorine is greater than that of fluorine

Bond energy of fluorine is less than that of chlorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Fluorine does not form oxoacid

The bibre which is composed of at least 85% by weight of acrylonitrile is known as

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Royan fibre

Azlon fibre

Saran binre

Acrylic fibre

A beaker contains 9 grams of water. The number of H-atoms is

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6.02 x 1023

3.01 x 1023

6.02 x 1024

3.01 x 1024

Series starting from57La,42Hf -80Hg is in the period:

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4th

5th

6th

7th

The sum of mole percent of all the components of solution is always equal to :

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Less than 100

One

100

10

The ph of 10-3 mole dm-3 of an aqueous solution of H₂SO₄ is :

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3.0

2.7

2.0

1.5

The prosthetic group in glycoprotein is

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Carbohydrate

Fat

Vitamin

Nucleic acid

Zwitter ion is ______ ion an amino acid

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Polar

Monopular

Dipolar

Non polar

Which one of the following is not an alkali metal

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Francium

Caesium

Rubidium

Radium

Which one of the following elements is not present in all proteins

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Carbon

Hydrogen

Nitrogen

Sulphur

The boiling points of alcohols are higher than the corresponding alkanes, This is because

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Of hydrogen bonding existing between molecules of alcohols

Alkanes are dipolar compounds

Alcohols are sweet in taste

Alcohols are soluble in water

Which statement is incorrect for and ideal solution

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The forces of attractions between solute and solvent molecules are same

There is no evolution or absorption of heat

Volume of the solution is less than sum of volumes of individual components

Vapour pressure of solution is directly proportional to the mole fraction of solvent

A limiting reactant is the one which

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Is taken in lesser quantity in grams as compared to other reactants

Is taken in lesser quantity in volume as compared to other reactants

Gives the maximum amount of the product which is required

Gives the minimum amount of the product under consideration

The electropositive elements from

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Acidic oxides

Basic oxides

Neutral oxides

None

The temperature at which the vapour pressure of a liquid becomes equal to external pressure is

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Melting point

Sublimation point

Inversion point

Boiling point

Bronze is an alloy which contains

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60% cu

70% cu

80% cu

99% cu

Which one of these is weakest?

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Ionest bond

Covalent bond

Metallic bond

Van der Waal's forces

Cyanohydrin of which of the following forms lactic acid

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HCHO

CH₃COCH₃

CH₃CHO

CH₃CH₂CH₂CHO

The human body can synthesize ______ amino acids

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1

10

20

19

The rate of reaction :

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Remain same as reaction proceeds.

May decrease or increase as reaction proceeds .

Increase as reaction proceeds.

Decreases as reaction proceeds.

Alcohols react with carboxylic acid to produce the class of compounds known as

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Grignard's reagent

Esters

Amides

None of these

Which of the following organic compounds exhibits positive Fehling test as well as iodoform test?

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Methanal

Ethanol

Propanone

Ethanal

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