Question # 1

A colloidal system in which a liquid is dispersed in a solid is called a/an

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Emulsion

Sol

Gel

Precipitate

The freezing point of a solvent

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Will increase on adding a solute

Will decrease on adding a solute

Will note change on adding solute

None of the above

Amorphous boron on burning in air form

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B(OH)3

Only B2O3

Only BN

Mixture of B2O3 and BN

Stainless steel consists of which elements.

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Fe only

Cr only

Fe and Ni

Fe ,Ni and Cr

The correct order of reactivity among I , Ii, and III IS.

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i > ii >iii

i > iii > ii

II > III > I

III > II > I

Which of the following is the most abundant alkaline earth metal.

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Be

Mg

Ca

Sr

Magnesium burns in air to give.

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MgO

MgCO3

Mg3N2

Both A and C

A group that causes deepning of the colour is known as

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Bathchromic

Hypsochromic

Hypochromic

Hyperchromic

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.

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 to non -auditory effect of noise on human body.

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Changes in the Vascular tone

_{Increase in the blood pressure}

Wakening of the coloured vision

All above

Which of the following process involves the use fo organic compound as an electron acceptor.

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Aerobic respiration

Anaerobic respiration

Fermentation

Glycolsis

In DTA , theriac effect may be exothermic of endothermic These are cause by

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Fusion

Crystal structure inversion

Destruction of crystal lattice

All of above

Which of the following statements is not related with flame photometric analysis.

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Vaporization of the solvent leaving back the residue

Conversion of solid slat to the gaseous state

Dissociation of gaseous molecules into free atoms

Measurement of the intensity of absorbed tradition

According to systematic nomenclature which hydrogen compound is sulphane.

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HF

Si H4

SF4

H2S

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

Which of the following effects best explains that o-nitro phenol is insoluble in water.

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Inductive effect

Resonance effect

Intramolecular H -bonding

Isomeric effect

carbon monoxide is harmful to human beings as it.

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Is carcinogenic

Is antagonistic to CO2

Has higher affinity for haemoglobin as compared to oxygen

Is destructive to O3

Which of the following is branch chain polymer.

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Glycogen

Terylene

PVC

Orlen

Granulated sugar also known as.

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Brown sugar

Refined sugar

White sugar

None of these

Silicon bronze contains how many percent of silicon.

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96%

3%

1 %

69 %

The main constituent of glass is.

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Silica

Silicon

Magnesia

Alumina

Coulometry is based on the measurement of

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Electrical current

Electrical potential

Electrical conductance

Dielectric constant

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

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1

2

3

zero

In C4-axis of rotation, an object in rotated through an angle of.

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120^o

180^o

100 ^o

90^o

Electronegativity is given by

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Average of first and second ionization energies.

Average of first and second electron affinites

Average of ionization energy and electron affinity

None of the above

What is the equilibrium temperature of transformation of austenite to pearlite

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1000 F

1333 F

166 6 F

1222 F

Colour in transition metal compounds in attributed to

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Small sized metal ions

Absorption of light in UV region

Complete ns sub shell

incomplete (n-1) sub shell

The base which in not present in DNA is

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Adenine

Guanine

Thymine

Cytosine

Nano particles may interact with the support to be.

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Partially oxidized

Partically reduced

Both a and b

None

Which of the following level is an indicator of hearing loss.

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> 25 dB

< 25 dB

<20 dB

None of these

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