Question # 1

Elastic collision involves:

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gain of energy

loss of energy

no relationship between elastic

no gain or loss of energy

Which of the following has the lowet solubility in water

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НСOOH

CH3СООН

CH3-CH2-СООН

C3H7-COOH

In which one of the following does the central atom not possess an 'octet' in its outer shell?

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BH₃

CH₄

NH₃

H₂O

Which of the following is synthetic thermoplastic polymer

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PVC

Bakelite

Synthetic varnishes

Both b & c

Which element of group V-A and VII-A does not use d-orbital?

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Nitrogen

Sulphur

Arsenic

Chlorine

α and β Glucose differs in orientation of hydroxyl group around

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C₁

C₂

C₃

C₄

BOD is the oxygen demand with in day(s):

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Four

Two

Three

Five

What will be the pH of 1.0 mol dm-3 of NH4OH, which is 1% dissociated

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2

12

0

2.7

Enzymes consist of

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proteins only

proteins and non-protein parts

fats only

futs and non-fatty components

Choose the correct equation among the following given by clauslus to understand to behaviour of molecules:

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PV =nRT

C_r.m.s= √3RT/M

d = PM/RT

PV = 1/3mnc^-2

According to charles law there will be a change in the volume of a given mass of a gas by 1/273 of its original volume at 0°C if the temperature of the gas is changed by

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10°

1°C

100°C

2°C

ΔH is equal to

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E + PV

E + PΔV

ΔE + P

ΔE + PΔV

Cracking normally gives smaller ______

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Alkanes

Alkenes

Alkynes

Both a and b

Which of the following fibres are made of polyamides?

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Dacron

Orlon

Nylon

Rayon

Most transition elements show

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Diamagnetic behavior

Ferromagnetic behavior

Paramagnetic behavior

None of these

The raw material to form nylon is

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Adipic acid

Butadiene

Isoprene

Ethylene

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1

2

3

4

The maximum number of electrons in the outermost shall of s-black elements is

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One

Two

Three

Four

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Rate = k[FeCl₃] [Kl]²

Rate = k[Fe⁺³][Cl^-1] [Kl]

Rate = k[Fe⁺³] [Cl^-1][K;]

Rate = k[Kl]³[FeCl₃]°

Planar geometry of molecules is due to

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sp³hybridization

sp²hybridization

sp hybridization

P - p overlap

Carboxylic acids generally exists in cyclic

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Monomers

Dimers

Trimers

Tetrameter

Which of the following aqueous solutions have the lowest freezing point

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5.85% NaCI

6% urea

34.2 sucrose

All of them have same freezing points

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