Question # 1

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

Acetamide is prepared by

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Heating ammonium acetate

Heating methyl cyanide

Heating ethyl acetate

The hydrolysis of methyl cyanide

Major food factors are:

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Fats and oils

Carbohydrates

Protiens

All of these

The relative lowering of vapour pressure is equal to the mole fraction of the solute, This law is called

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Henry's law

Raoult's law

Ostwald's law

Arrhenius law

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

In a group the atomic size increase downward due to

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Addition of electronic shells

Increase in the proton number

Repulsion of electrons

All of the above

The catalytic prmoter used for the industrial preparation of acetaldehyde is

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PdCI₂

CuCI₂

Pd + CaCI₂

None of these

Heaviest particle is

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Meson

Neutron

Proton

Electron

Which of the following statements about acetic, anhydride is not correct

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It is immiscible with water but is hydrolysed to give acetic acid

It is prepared by the action of actyl chloride on the sodium salt of acetic acid

it reacts with ammonia to give acetamide

it is a strong acid

Eutrophication causes reduction in

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Dissolved hydrogen

Dissolved oxygen

Dissolved salts

All the above

The rate of which the reaction proceeds is directly proportional to the product of the active masses of the reactants is according to

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Law of mass action

Le Chateliers principle

Equilibrium law

Law of constant proportion

How many molecules of chlorine adds in benzene in the presence of sunlight

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One

Two

Three

Four

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

Optical rotation method is sued when

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Reaction involve ions

Change of refractive indices

Reactions involving change of optical activity

None of the above

Elements in the same family have

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Same atomic number

Molecular wt same

Same chemical properties

Same electronic configuration

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

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07

17

27

37

Ketones are prepared by the oxidation of:

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

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Q and R Q and R

R only Q and R

Q and R R only

Q only R only

In H₂O molecule the bond angle is

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90°

109.5°

107°

104.5°

Which of the following is a molecular diseases?

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Allergy

Cancer

German measles

Sickle cell anemia

An organic compound has the following properties ; It gives a positive tri-iodomethane test; it gives a yellow ppt, with 2, 4-DNP regent; it does not react with Tollen's reagent . Which compound would give these results

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CH₃CHO

CH₃CH₂OH

CH₃CH₂COCH₃

CH₃CH₂CH₂CHO

Transition elements form which type of bond

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Ionic bonds only

Covalent bonds only

Ionic and covalent bonds

Polar bonds

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

Both E₁and E₂mechanism can be shown by

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1° - RX

2° - RX

3° - RX

None of these

The number of moles of NH₄CI dissolved in 500 cm³of its 15%, W/N solution is

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1 mole

1.4 mole

2.0 mole

2.4 mole

Carboxylic acids functional group is:

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----COOH

-----COH

----CO---

----OH

Ionization potential increases in moving from left to right in a period

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Because nuclear charge increase

Because atomic size decrease

Both (a) and (b)

Because atomic size increases

The hydration energy is the heat evolved when one mole of gaseous ion is dissolved in water. The hydration energy of an ion

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Increases with increase of charge to mass ratio

Decreases with increase of charge to mass ratio

Depends on sign of charge +ve or -ve

Depends upon the solvent

Two moles of HI was heated in a sealed tube at 440°C till the equilibrium was reached. HI was found to be 22% decomposed. The equilibrium constant for dissociation is

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0.282

0.0796

0.0199

1.99

If 18 g glucose (C₆H₁₂C₆) is present in 1000 g of an aqueous of glucose it is said to be

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1 molal

1.1 molal

0.5 molal

0.1 molal

In the expression rate = K [A]^a[B]^bK is

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The order of reaction

The speed of reaction

The specific rate constant

The overall order of reaction

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