Question # 1

Which of the following is not an acid radical

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Cl-

Br-

K+

I-

A trend which is common to elements of both the group IA and group VII A ongoing from top to bottom.

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Boiling point increases

Electron affinity increases

Oxidizing power increases

Ionization energy decrease

Which of the following compound does not following octet rule.

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CS2

PBr3

IBr

Br F3

Which of the following is a natural polymer

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Nylon

Leucite

Cellulose

Polystyrene

What is the ratio of stress to strain in a material loaded within its elastic ranger.

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Poisson’s ratio

Refractive index

Modulus of elasticity

None of above

in the process of production of soap the soap can be salted out by adding

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Concentrated sulphuric acid

Concentrated potassium hydroxide solution

Concentrated sodium chloride solution

None of above

The reduction of an alkyne to alkene using Lindlar's catalyst results into

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Syn addition of hydrogen atoms

Anti addition of hydrogen atoms

A mixture obtained by ayn and anti addition of hydrogen which are equilibrium with each other

A mixture obtained by syn and anti addition of hydrogen which are not in equilibrium with each other.

Which of the following steps are involved in the extraction of copper.

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Roasting

Smelting

Refining

All

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

When a drop of detergent solution is added onto a clean towel. It spreads instead of existing as a droplet Which of the following statements explains this phenomenon.

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Detergent acts as an emulsifying agent

Detergent reduce surface tension of water

Detergent reduces surface tension of water

All of above

Iron which contains up to 1% carbon is called.

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Steel

Cast iron

Wrought iron

Pig iron

According to CFT the metal ligand bond is considered to be ionic to presentage.

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100%

90%

50%

70%

The lowest K.E. for an electron is three dime national cubic box is given by

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h²/ 8m^a

3h² / 8 ma²

9h²/ 8ma²

16h² / 8ma²

The chrome molybdenum steels contain how many percent of molybdenum

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0.10

0.20

0.30

0.40

Which of the following reacts with excess oxygen to form a normal oxide.

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Li

Na

K

Rb

The magnetic quantum number (m) specifies the individual orbital in a Sub shell for a given l, m can be.

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l,l- l........-1

l........2, l -3.......-2l

l-l-2,..........-l

l-2,l-4, ............-4l

The correct order of ionization energies of alkali metals is.

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Li > Na > K > Rb

Na > K > Rb > Li

Rb > K > Na > Li

Rb > K > Li > Na

Perdisulphuric acid is.

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Marshal acid

Caro acid

None of above

Any of above

The rate constant for 3rd order reaction has the dimentions of.

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mol-2 s-1

I2 mol-2 s-1

mol I -1 s-1

I-1 mol -1 s-1

An optically active compound

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_{Must contain at least favour carbons}

When in solution rotate the plane of polarized light

Most always contain an asymmetric carbon atom

In solution always give negative reading in polarimetre

What is the possible number of optical isomers for a compound contained 2 dissimilar asymmetric carbon atoms.

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2

4

6

8

The noble gases are used due to having property

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Chomical inertness

Low boiling point

Any of a or b

Both a and b

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

The process requirieng the absorption of energy of.

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F = F

Cl = Cl

H = H

O = O

Which is not an ore of aluminium.

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Baxuite

Cryolite

Monazite

Corundum

Which of the following polymers is chlorinated.

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Orlon

Neoprene

Dacron

None of these

A closed system is one which can exchange with surrounding.

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Matter but not energy

Energy but not matter

Both matter and energy

Neither matter nor energy

The key element to be considered when evaluating a health hazard is.

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The amount of material the employee is exposed.

The total time of exposure

The toxicity of the substance

All above

For quality control of Portland cement, the test essentially done is.

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Setting time

Soundness

Tensile strength

All

For an elementary reaction

2A + B ------------------- C + D

The molecularity of the reaction is.

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1

2+

3

4

The study of coiled long peptide chains of protein to give a 3 dimensional structure is the study of.

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Primary structure

Secondary structure.

Tertiary structure

Quaternary structure.

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