Question # 1

Which of the following test to used to find out whether the observed data differ significantly from the one obtained from theoretical distribution.

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Chi square test

F -Test

Student's test

Coefficient of variance

Which of the following statement is not true for carbon.

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Its forms compounds with multiple bonds

Its ionization energy is very high

It undergoes catanation

It shows inert pair effect

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

Which of the following biogeochemical cycle is not component of ecosystem.

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Carbon cycle

Potassium cycle

Oxygen cycle

Nitrogen cycle

Which of the following alkyl halide undergoes nucleophilic substitution reaction via the formation of a carboncation.

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1-chloro -2 methyl propane

2- chlro-2-methyl propane

2- chloro butane

1-Chloro, 3,3- dimethyl pentane

Bromination of n-butane produces.

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I-bromobutane as the major product

2- bromobutane as the major product

Both I - bromo and 2- bromobutane with equal percentage

Both i-bromo and 2-bromo products whose percentage depends upon temperature.

Which name is associated with the rules which help in predicting the portability of anion.

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Soddy

Slater

Fajan

Linus pauling

Which of the following is not a component of hollow cathode lamp.

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Anode

Cathode

Filter gas

Atomic vapour

Identify an oxygenated cyclic terpenoid

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a- pinene

Camphor

Citral

Geranial

The interactions in HF are.

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dipole dipole interasctions

Hydrogen bonds

dipole -dipole and dispersion forces

Hydrogen bond and diapersin forces

The emission of light characteristics of metal and correlation of intensity of the light emitted with concentration of that metal forms the basis of.

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Roman spectroscopy

IR spectroscopy

Flame photometry

Rotational spectroscopy

Lother Meyer plotted a graph showing variation of.

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Atomic volume with increase in atomic number

Atomic volume with increase in atomic weight

Atomic redii with increase in atomic weight.

Atomic weight which increase in atomic number

If diesel has cetane number of 50 then the diesel index will be.

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36

46

56

66

Both the elements are typical non metals.

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B & Ai

B & Si

Al & Si

Any of above

A steel cannot qualify for stainless prefix until it has at least how many percent of chromium.

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10 %

20 %

5 %

30 %

Which of the following sets of quantum number is possible.

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n = 4, l = 3, m = -3 ,s = 0

n = 4, l = 0, m = 0, s =+1/2

n = 4, l = 4, m = -4, s = -1/2

None of these

The vapours attacks the eyes and mucous membrane of nose and throat

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F

Cl

I

Br

The magnitude of electron affinity depends on.

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Atomic size

Nuclear charge

Electronic configuration

All of the above

CFT can very well explain

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Color

Magnetic properties

Spectra of transition metal

All

Which of the following statement is not related to the characteristics of gaseous state.

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The inter molecular forces of attraction are not strong in gaseous state

The gases do not have definite shape and volume

The gases are characterized by low density.

The gases have low comprehensibility

Which of the following statement is not related with environmental pollution.

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Direct or indirect change in any component of the biosphere

Undesirable change in the physical characteristics of the air

Undesirables change in the biological characteristics of the soil

not affecting adversely the industrial progress

Which of the following molecules have centre of symmetry.

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H2O

HCl

CO2

H2SO4

The conductance of 1 cm3 of an electrolytes solution is called its.

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Specific resistance

Specific conductance

Molar conductance

Equivalent conductance

The maximum degree of freedom for a pure substance under equilibrium constitutions is

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1

2

3

zero

Which of the following pollutant result from roasting and heating processes.

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Dust

Smoke

Metal fumes

All above

The size of E coli bacteria is._____________ nm

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75000

2000

200

5

The melting of nearly all glass is done in a continuous tank furnace. which operates steadily over periods of up to.

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a day

a month

a year

None of these

An example of acyclic monotterpenoid is

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a -pinene

Camphor

Geranial

Citral

What types of bonding occurs in d-block elements.

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Ionic

Covalent

Metallic

Both B and C

Which of the following is not an alkali metal.

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Potassium

Francium

Sodium

Strontium

The correct order of second ionization potential of carbon , nitrogen, oxygen and fluorine is.

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C > N > O > F

O > N > F > C

O > F > N > C

F > O > N > C

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