Question # 1

Metallic bonds have been explained by many theories. Luis Pauling has proposed a theory called

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molecular orbital theory

electron gas theory

band theory

valence bond theory

The substitution of a'-H' by '-NO2' group in benzene is called

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Nitration

Sulphonation

Ammunolusis

Reduction of benzene

0.1M HCI having pH =1.0 it is about 100 time stronger than acetic acid what will be the pH of acetic acid:

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0.1

1.3

2

3

Which of the following is a simple protein

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Albumins

Legumin

Callogen

All

The type of isomerism shown by alkyl halides is

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geometric

functional

positional

metamerism

One of the best applications of Hess's law to calculate the lattice energy of ionic compound is

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Measurement of enthalpy change in a calorimeter

Studying of first law of thermodynamics

Measurement of a heat of formation of a compound

Born-Haber cycle

The fibre which is made form acrylonitrile as monomer

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PVC

rayon fibre

acrylic fibre

polyester fibre

During the manufacturing process of cement the temperature of the decomposition zone goes up to:

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600°C

800°C

1000°C

1200°C

Choose the crop for which ammonium nitrate is not used:

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paddy rise

cotton

wheat

sugar cane

Natural fertilizers are materials derived form:

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plants

animals only

both plant and animals

none of all

In MgCl2, the oxidation state ofCI is

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Zero

-2

+2

-1

Which of all following compound is not possible

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The principle quantum number describes

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The distance form the nucleus

The shape of the orbital

The orientation of the orbital

The spin of the electron

N₂O₄⇌ 2NO₂

For the above reaction, which of the Following expression of K_c correct :

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Kc = [ N₂O₄]/[ NO₂]²

Kc = [ N₂O₄]/ [NO₂]

Kc = [ N₂O]²/[ N₂O₄]

Kc = [ N₂O₄]/[ N O₂]

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di(4-bormophenyl) method

Methanol

Propan-1-ol

Propan-2-ol

The formula of esters is

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Types of cracking are:

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Thermal

Catalytic

Steam

All a, b ,c

An element of the third period (Na to S) is heated in chlorine. The product is purified and then added to water. The resulting solution is found to be neutral. What is the element

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Sodium

Aluminium

Silicon

Phosphorus

Which if the following has the highest freezing point at one atmosphere

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0.1 M NaCI

0.1 M sugar solution

0.1 M BaCI₂

0.1 M FeCI₂solution

Incomplete oxidation of alkanes yields

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CO₂& carbon black

CO₂+ heat

CO and carbon black

CO + heat

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

Ethyl alcohol gives ethyl chloride with the help of

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SOCl₂

NaCl

Cl₂

KCl

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