Question # 1

Greenish yellow gas with pungent irritating odour

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Chlorine

Fluorine

Iodine

Bromine

When a large block of silicon wafer is reduced to smaller component and hence non material is formed this approach is called.

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Bottom up

Top down

Left to right

Right to left

Which of the following elements would have the lowest first ionization energy

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Mg

Rb

Li

Ca

Select the major product obtained from the addition of HBr to I -Methyl cyclohexene

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1-bromo -2- methyl cyclohexane

6- bromo-i- methyl cyclohex -i- ene

3- bromo -1- methyl cyclohex - 1- ene

I-bromo -I- methyl cyclohexane

The only oxidation state of alkali metals in their compounds is.

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+1

+2

-1

0

The formula of sulphur sesquioxide

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SO4

S2O7

S2O3

SO3

Which of the following is the cause of Brownian movement of colloidal particles.

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Convection currents int he fluid

Bombardment by the molecules of the dispersion medium

Setting of dispersed phase under gravity.

Thermal gradient in the medium

Indicate false statement about stainless steel

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The density of stainless steel is about the same as carbon or low alloy steels

Stainless steels are poor conductors of heat

Stainless steels are poor conductors of electricity

Stainless steels have tensile moduli greater than those of carbon and alloy steels.

Which of the following statement represent disadvantages of sanitary landfill

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Public opposition

Uneconomical

Health hazard

All above

Valences bond theory was put forward by

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Pauling and Slatter

Heitler and London

Lewis

Pauli

Photochemical smog consist of excessive amount of X in addition to aldehydes ketones, PAN etc. X is.

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Methane

Carbon monoxide

Ozone

Carbondioxide

In German Silver copper is alloyed with which metal.

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Zn

Ni

Ai

Zn and Ni

Compounds formed when noble gasses get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are called.

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Interstitial compounds

Hydrates

Clathrates

Picrates

The types of coordinate compounds.

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Labila

Inert

Both A and B

None of above

At constant temperature , the decrease in Halmholts free energy is equal to.

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Decrease in entropy

Increase in entropy

Reversible work done by the system

All types of work done

The decrease in electron density at one position accompanied by a corresponding increase at other position is called.

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Inductive effect

Asymmetric effect

Electromeric effect

Resonance effect

Dyes which can be applied to cellulosic fibre from water solution are called.

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Ingrain dyes

Substantive dyes

Mordant dyes

Vat dyes

Titanium dioxide shows the lattice strcuture.

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Flluorite

Rutile

Wurtzite

Zeolite

The ionization potential of K would be numerically equal to.

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Electron affinity of Ar

Electromagnetically of K

Electron affinity of K+

ionization energy of Ca

Which of the following cast iron is heat treated for ductility.

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Gray iron

Malleable iron

White iron

None of these

The most important problem regarding nano chemistry

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Elucidation of relationship between also and chemical reactivity of particle

Determination of size of particle

Determination of reactivity of particle

Determination of physical properties of nano particles.

The concept is also known as electron pair donor acceptor system.

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Bronsted Lowery

Lewis

Lux -Flood

Usanovich

The formula of copper pyrite is.

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CuFeS

CuFeS2

Cu2FEs

Cu Fe2S

Iron is said to be abundant in nature. About how many percent of the earth’s crust is iron.

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10%

5%

20%

8%

In the process of preparation of detergents the organic acids produced are neutralized with.

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Sodium hydroxide

Sodium sulphate

Sodium chloride

Potassium hydroxide

Which of the following source of energy is abundant everlasting and non polluting.

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Nuclear

Electric

Solar

All above

Deviation in a particular measurement is the difference between the measured value and the average value The arithmetic mean of the different deviations observed in several measurements of the same quantity is known as.

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The standard deviation

The average deviation

Relative mean deviation

variance

Example of peseudohalonge group.

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Cyanogen

Thiocyanogen

Selenocyanogen

All above

Xenon diflouride is obtained by irradiating a mixture of xenon and fluorine with light from a high pressure.

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Mercury arc

Tungeston arc

Xenon arc

None of above

Photochemical among is generally formed

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In early hours of winters

Around mid day in summer months

When intensity of solar radiation sis very low

When concentration of particulate matter is very low.

The electronegativity of the following elements increases in the order.

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C,N, Si, P

N, Si, C,P

Si, P, C, N

P, Si, N, C

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