Question # 1

The sugar present in RNA is

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D- ribose

D-Arabinose

D-Glucose

Deoxyribose

Which among the following elements has the highest value of IE.

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Mg

Na

Ca

Sr

Which of the following is used to make non-stick material.

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Vinyl cyanide

Tetrafluoroethene

Vinyl chloride

Styrene

Which of the following is an azo dye.

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Congo red

Rhodamine B

Ertythroein

Paraosaniline

Which of the following is NOT true 7 ceramic materials are.

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Hard, have high densities high compressive strength and very good thermal resistance and strength at higher temperature Silicon

Hard, have low densities high compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities low compressive strength and very good thermal resistance and strength at higher temperature.

Hard, have low densities' high compressive strength and very good thermal resistance and strength at higher temperature.

A 2M solution of H2SO4 would have how many moles of H+ ion in one liter

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1.0

2.0

4.0

5.0

If the values of standrd deviations for the first and second method differ, then which of the following test helps one to know whether this difference is significant.

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Student's test

F-Test

Chi square test

Standard deviation

Most effective pesticide is

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Carbonates

Organophosphates

Organ chlorines

All of these

1 nanometre =___________ cm

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10^-9

10^-8

10^-7

10^-6

Which of the following dye is used an antiseptic .

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Methyl orange

Mercurochrome

Alizarin

Bismarck brown

Photochemical smog is caused primarily by

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CO

CO2

NO2

O3

In whihc period, the element with least ionization enthalpy belong to

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Group I

Group 2

Group 17

Group 18

Which of the following is biodegradable pollutant.

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Domestic waste

DDT

Mercury salta

Aluminum foil

Which of the following statement is not relevant with nitrous oxide.

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It is a colorless and odourless gas

It is non toxic gas

It is present in the atmosphere in higher concentration

It has high reactivity in the lower atmosphere

What refers to the removal of zinc from brasses?

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Dezincification

Graphitization

Stabilization

Denitration

Which of the following solids is a better conductor of electricity.

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Pore NaCl cyrstal

Diamond

Graphite

Marble pieces

Sodium silicate is used

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In the paint industry

For fixing labels to glass

In a soap industry

All above

Bond angle is minimum in

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H2O

CO2

NH3

CH4

Which of the following is not true of ozone.

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It is a strong electilizing agent

It attacks organic compounds containing carbon carbon double bond

Its molecular is linear and has two different O-O bond lengths

It is more powerful oxidising agent at molecular oxygen

The size of iso electronic species - F- , Ne, and Na+ is affected by

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Nuclear charge (Z)

Valence principal quantum number (n)

Electron electron interaction in the outer orbital

None of the factors because their size to the same.

The second order rate constant can have units.

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dm-6 mol 2 s-1

dm3 mol s-1

dm³ mol^-1 s^-1

dm6 mol-1 s-1

Alnico is an alloy containing how many percent nickel.

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10%

14%

18%

22%

Water pollution is due to

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Agricultural discharges

Swages and other wastes

Industrial effects

All the above

Naphthalene balls are obtained from

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Carbon

Coke

Coal Tar

All of above

Which of the following reagent cannot be used to detect the phenolic group.

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Neutral FeCl3

I2/NaOH

NaOH solution

Br2/H2O

The unequal sharing of bonded pair of electrons between the two atoms in a molecule causes.

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Dipole

Radical formation

Decomposition of found

Covalent found

Conductometry is based on

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Electric current

Electrical potential

Absorbance

Electrical conductance

The capacity of normal human eye to see the smallest object is _______ micro meter

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10000

1000

100

10

Setting of cement is improved by

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Lime stone

Clay

Gypsum

Water

Pick out the incorrect statements for transition metals.

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They have low melting and boiling points

5d-element have higher energies than 3d or 4 d elements

Zr and Hf have almost identical atomic and ionic radii

They form interstitial compounds.

In a system of designating wrought aluminum alloys. what does the second digit represents.

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The purity of aluminum

The identity of the alloy

The modification of the alloy group or impurity limits

None of above

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