Question # 1

The metallic character of group 14 elements

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Decreases from top to bottom

Increases from top to bottom

Does not change gradully

Has no significance

The height to which a liquid will rise in an open capillary tube is inversely proportional to.

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Temperature of the liquid

Surface tension

Density of the liquid

Air pressure

The addition HCl to 2-pentene give

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3-Chloropentane

2- Chloropentyne

2- Chloropentane

2-Chloro-2-methyl butane

The rusting of iron is catalysed by which of the following.

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Fe

O2

Zn

H+

Cement is a mixture of

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Clay and clinker

Clay limestone and gypsum

Limestone and gypsum

Binder

How many stereoisomers are possible for CH3CH = CHCHCH(Br) CH3

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2- geometrical isomers

2- optical isomers

2- geometricla nad 2- optical isomers

2- geometrical and 1 optical isomers

J.J. Thomson established certain properties about cathode rays. Which of the following is not related to cathode rays.

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Cathode rays from a gas discharge tube consists of negatively charged particles

Cathode rays are called electrons.

The e/m ratio of cathode rays depends on the gas inside

Cathode rays are affected by electric and magnetic fields.

The matrix is usually in the form of.

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Sand

Limestone

Rocks

All

Which of the following will have the largest pH?

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O.1 N HCl

0.1 N CH3COOH

0.1 N NaOH

0.01 N NaOH

Which librates H2 with NaOH

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B

AI

Zn

All

Which of the following technique is based on deposition of the analyte at appropriate electrode by the passage of the electric current.

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Chromatography

Dialysis

Electrodeposition

Solvent extraction

The width of a carbon nano tube is.________ nm

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1

1.3

2.5

10

In which of the following compounds does hydrogen bonding occur.

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CCl4

NaH

HI

NH3

Which of the following dye is used an antiseptic .

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Methyl orange

Mercurochrome

Alizarin

Bismarck brown

Which of the following contains both covalent and ionic bond.

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CCl4

NH4Cl

CaCl2

H2O

The main constituents of ___________ are boron oxide and silica.

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Pyrex glass

Low silica glass

Soda lime glass

Super hard glass

At extremely low pressures, the van der Waals equations for one mole may be written as.

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PV = RT + Pb

PV = RT

PV = RT - a/V

(P +a) (V-b) = RT

Un-like s -block elements d-block elements form which compounds as well

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ionic compounds

Co valent compound

Co ordinate compounds

None of above

What corrosion occurs under organic coating on metals as fine wavy hairlines?

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Stray current corrosion

Microbiological corrosion

Filiform corrosion

Simple corrosion

The bond along Sp2 hybridization is.

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180^o

120^o

109.5^o

160^o

What is the ASTM tension testing designation for standard method for steel products.

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A 370

E 345

E8

E 9

What type of inter molecular force present in nylon-66^o

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Vander wall

Hydrogen bond

Dipole -dipole interactions

Sulphide linkage

Which of the following would decompose at lowest temperature.

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MgCO3

SrCO3

BaCO3

CaCO3

Which of the following liquids has lowest vapour pressure at 25 ^oC

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Benzene

Chloroform

Ether

H2O

The most stable oxidation state shown by lead is.

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+2 , +4

+2 only

+3 , +4

+4 only

If reaction A has an activation energy of 250 kj and reaction activation energy of 100 kj, which of the following statements must be correct.

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If reaction A is exothermic and reaction B is endothermic then reaction A is favored kinetically

At the same temperature the rate of reaction B is greater than the rate of reaction A

The energy of reaction A must be greater than the energy of reaction B.

The energy of reaction B must be greater than the energy of reaction A

The attraction which exists between carbon dioxide molecules in solid carbon dioxide is due to.

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Van der Waal's forces

Molecule ion forces

ionic bonds

hydrogen bonds

Which of the following statement is not correct with respect to group theory.

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Two elements of a group combine to form a third element of a group

An element combines with itself to form another element of the group.

Each element of the group obey associative law of combination

Each group element has no reciprocal

Which of the following is not an alkali metal

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Rb

Sb

Cs

Fr

The action of all the relations of all the organism to their environment is called

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Biology

Botany

Ecology

Archiology

The electronic configuration of chromium is 4s1, 3d5, The elements tungsten (W) belongs to the same group and has atomic number 74.The configuration of its valence shell is.

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5s1, 4d5

6s1, 5d5

6s1, 5d6

6s1, 5d4

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