Question # 1

What refers to the tin mill steel, without a coating.

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White plate

Black plate

Tin steel free

Dichromate tin

The pH of milk is

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6.0

6.5

7.0

7.5

Which of the following solution would exhibit abnormal colligative proportions.

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0.1 M NaCl

0.1 M urea

0.1 M sucrose

0.1 M glucose

Since the acid gives both acidic and normal salts so the acid is.

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di acid

di basic

double salt

Any of above

What refers to the application of any process whereby the surface of steel is altered so that it will become hard.

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Caburizing

Case harden zing

Ammealing

Surface hardening

Which of the following statements is correct.

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A sigma bond is weaker than a pi pond

There are four coordinate bonds in the Lewis structure of NH4+ ion.

The 1 covalent bond is directional in nature

A single bond between the two atoms cannot be re bond.

The bond length of C = C is

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1.20 A^o

1.34 A^o

1.54 A^o

1.68 A^o

Which of the following is raw material not present on the cement.

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Lime stone

Gypsum

Red lead

Blast furnace slag

Thermocouples have been constructed from

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Chromel ve elumel

Copper vs platinum

Both

None

Which of the following techniques does not belong to column chromatographyy

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TLC

HPLC

Electrophoresis

Ion exchange

During sintering densification is not due to

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Atomic diffusion

Surface diffusion

Bulk diffusion

Surface tenstion

The common ligands can be arranged in order of their increasing splitting power to cause d-orbitals splitting. This series is called as.

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Electro-chemical

Spectro -chemical

Physico-chemical

Spectro -electrical

The intensity of magnetization produced per unit strength of the applied magnetic field is called magnetic susceptibility., which of the following statements is not related with this phenomenon.

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Confirmation of structure of given compound

Complex storeochemistry

Diamagnetic nature of molecules

Paramagnetic nature of molecules.

The decomposition of dimethyl ether at 504 oC is first order with a half -life of 1570 second. What fraction of an initial amount of dimethyl ether remain after 47-10 seconds.

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1/3

1/6

1/8

1/16

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

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1

2

3

zero

The relative error is usually expressed as

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Parts per ten

Parts per one

Parts per hundred

Botha C and D

Explosive trioxide XeO3 is produced when

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XeOF4 reacts with water

XeOF4 reacts with silica

XeF4 reacts with water

Any of above statements

A general trend in the properties of elements of carbon family shows that with increase in atomic number.

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The tendency towards concatenation increases

The tendency to show +2 oxidation state increase

Metallic character decreases

The tendency to form complexes with convalency higher than four decreases.

The inert gases Ar, Kr and Ke form compounds with water at low temperature and high pressure. These compounds are called.

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Halides

Hydrates

Clathrates

All of above

The name hydrogen was proposed by.

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Lavoisier

Rutherford

Henry Cavandish

Scheele

The order in O2+ is

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1.0

1.5

2.0

2.5

Which of the following is strong adheaive.

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Epoxy resin

Melamine -formadehyde resin

Alkyd resins

Bakelite

Diamond and carbon are the _________ forms of carbon

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Isotropic

amorphous

Allotropic

Isomeric

The principle former of almost all glasses is

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(SIO2)n

(SiO3)n

(SiO2)

None of these

Which pair of species can undergo chemical reaction with each other.

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CO+ NO

LiH and H2O

CO2 and HCl

CaH2 and SI H4

In propagation step the reaction intermediate of radical polymerization is

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Carbocation

Carbonion

Free radical

Carbene

What is clinker.

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Roasted calcareous material

Roasted argillaceous material

Roasted calcareous and argillaceous material

Roasted gypsum

Which of the following method is based on the solubility difference between the analyte and the unwanted components.

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Distillation

Complex formation

Electrodepostion

Precipitation

Pick out the incorrect statement.

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Red phosphorus consists of a complied chain structure and black phosphorus has a layer structure.

Nitrogen shows a little tendency for catenation, because N-N a single bond is very strong.

The xamimum number of covalent bonds formed by nitrogen is four, since it has no d-orbitals in its valence shell

The group 15 elements do not form M5+ ions, but +5 oxidatin state is realized only through covalent bonding.

The photoelectric effect is the ejection pf electrons from the surface of metal when light falls on it. Which of the following statements is not correct about the phenomenon.

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The kinetic energy of photo electron depends upon the frequency of the incident radiation

Electrons are ejected only when the frequency of light exceeds a certain threshold value

The higher the energy of the photon greater the kinetic energy of the ejected electron.

The threshold frequency of all the metals is same.

Fluorine does not show variable oxidation state because of.

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its high electronegativity

Its small sixe

low dissociation energy of F-F bond

Non availability of d-orbitals

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