Question # 1

Which librates H2 with NaOH

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B

AI

Zn

All

The internal resistance to flow possessed by a liquid is called its.

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Fluidity

Viscosity

Surface tension

Turbidity

The pair of molecules or ions having identical geometry is.

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BCl3, PCl3

BF3, NH3

CHCl3, CCl4

SiCl4, CCl4

Is an instate able colourles gas with a sticky sweet odor and is extremely toxic.

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B2 H6

B4 H10

B3 H9

B6 H10

CFSE for d⁷ ion is.

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0.8

-0.8

-1.8

1.8

Chlorine when attached to benzene has

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+1 and + R effect

-1 and - R effect

-1 and +R effect

None of the above

When 0.01 moles of NaOH are added to a buffer solution, its pH changes from 4.745 to 4.832 WHAT IS ITS.

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0.115

0.900

0.015

0.215

In vinyl cyanide, the number of a bonds in

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2

3

1

4

The gases H2, N2, O2 and NH3 . H2 =2 , N2 = 28, O2 = 32 and NH3 =17 will effuse in the order.

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H2> N2> O2 > NH3

NH3 >O2 > N2 > H2

H2 > N2 > NH3 > O2

H2 >NH3 > N2 > O2

The expected specific waste of paper and allied products industry is.

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Chemicals

Paper and fibre residues

Links

All above

PCl5 is an example of hybridization

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d sp³

d2 sp2

sp2

sp3

Which one of the following is natural polymer.

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Starch

Nylon-6

Neoprene

Buna-S, SBR

Bioconversion of biomass can be used for.

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Heating purposes

Power production

Methane production

All of the above

Which one of the following pairs are chemically dissimilar.

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Na and K

Ba and Sr

Zr and HF

Ca and Zn

Bromine number is measure of.

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Paraffins

Unsaturates

Saturates

None of these

Which of the following analytical technique is not concerned with atomic spectroscopy.

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Flame photometry

Flame emission spectrometry

Atomic absorption spectrometry

I-R spectrophotometry

Acid rain effects

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Human being

Crops

Aquatic life

All above

The property measured in DTA is

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Heat effects

Weight loss

Rate of change in weight

Change in temperature

Human hearing is sensitive to frequency in the range of about

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10,000 - 20,000 Hz

10 - 10,000 Hz

16- 20,000 Hz

None of the above

The number of degree freedom at the triple point for the water system in.

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One

Two

Three

Zero

Hydrogen at the moment of its generation is generally called.

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Protium

Nascent hydrogen

Atomic hydorgen

Heavy hydrogen

The fluoride tooth paste contains

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SnF2 and Sn2P2O7

NaF

CaF2

None of these

Equilibrium constant Kp and Kc are related as

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Kc = Kp (RT)delta n

Kp = Kc (RT)an

Kp = (Kc/RT)delta n

Kp -Kc = (RT)delta n

Which one of following is non polar

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CH2Cl2

CCl4

CHCl3

CH3Cl

Which of the following pollutant is generated from combustion of fuel.

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Smoke

SO2

CO2

Metallic oxides

All above

Petroleum is mixture of

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Petrol

Diesal

Petroleum

All of these

In their ionic compounds halogens exhinit the oxidation states of.

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-1

-2

-3

-4

__________ is used for fruits, vegetables and tobacco

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Potassium Chloride

Potassium Sulphate

Potassium nitraite

All above

Urea an enzyme used to estimate urea is a

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Hydrolytic enzyme

Oxidative enzyme

Reductive enzyme

Iso me rising enzyme

Recrystallization is the most common technique of purification of solid organic substances Which of the following statements is not related with characteristics of a suitable solvent.

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It dissolves the substance on heating

It readily allows it to separate out in the form of crystal on cooling

It does not react chemically with substance

It does dissolve the impurities.

Pick out the incorrect statement about K2Cr2O7

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It is thermally stable

It dissolves in alkali to form chromate

It oxidizes acidified FeSO4 solution to Fe2(SO4)3

It is used as cleansing agent for glassware, etc. when mixed wiht cold conc. H2SO4

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