Question # 1

Born-Haber cycle is an application of

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Hess's law

1" law of thermodynamics

Avogadro's law

1law of thermochemistry

The elements like N,P,K added into the large amount in soil are called:

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Basic elements

Additives

Macronutrients

Micronutrients

Which one of the following is an appropriate indication of positive iodoform test?

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Formation of H2O

Brick red precipitate

Release of H2 gas

Yellow precipitate

Enzymes are catalysts which contain other than carbon and hydrogen one other element

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oxygen

sulphur

phosphorus

iodine

Dipole-dipole forces are present between:

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non-polar molecules

polar molecules

both polar and non-polar

none pf above

The three dimensional folding and twisting of a polypeptide chain give rise to

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Primary structure

Secondary structure

Tertiary Structure

All of these tertiary

In which of the following Equilibria will Kc and Kp have not the same value

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2HI <--------> H2+I2

2SO2 + O2 <--------> 2SO3

N2 + O2 <---------> 2NO

All of these

The words smog is a combination of smoke and:

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fog

foke

fork

fizzy

By convention, the standard heat of formation of all elements is assumed to be

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Zero

positive

Negative

Infinity

Pyridine is an example af

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Homocyclic compound

Heterocyclic compound

Carbocyclic compound

Aliphatic compound

Cl₂is a gas while iodine is a solid due to

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stronger London forces with high polarizability

greater electro negativity of Cl than iodine

stronger dipole dipole forces

iodine is colored while chlorine is colourless

What is the volume in cm³of 3.01 x 10²³molecules of O₂gas at S.T.P

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1000 cm³

11000 cm³

1120 cm³

11200 cm³

The metal present in blood is

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Al

Hg

Cu

Fe

The total number of transition elements is:

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10

14

40

50

N₂3H₂⇌ 2NH₃

_{Which of the following change will favorthe formation of more}NH₃at equilibrium in above reaction :

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By adding NH_3.

By removingH_2.

By decreasing pressure.

By increasing pressure.

Of the following four reactions, formic acid and acetic acid differ in which respect?

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Replacement of hydrogen by sodium

Formation of ester with alcohol

Reduction of Fehling solution

Blue litmus reaction

In Millikan method the oil droplet falls under the force of gravity but it moves upward due to

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Electric field

Magnetic field

Incident light

X-rays

Palmitic acid & steanic acid ae obtained from process of fats & oils:

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Reduction

Neutralization

oxidation

hydrolysis

In molecules kinetic and potential energies are:

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Definite

Moderate

Indefinite

None of above

The alkali metal which is liquid at 15°C is

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K

Cs

Na

None

Which of the following forms a toxic substance in blood by combing with hemoglobin?

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Carbon dioxide

Carbon monoxide

Oxygen

Methane

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Zero

253 sec

150 sec

500 sec

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