Question # 1

Equal volumes of all gases, under similar conditions of temperature and pressure, contain equal number of molecules. This is a statement of.

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Graham's law

Dalton's law

Avogadro' law

Boyle's law

The particle motion in solids is

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Only vibratory

Only translator

Vibratory and rotatory

Only translatory

Given A + 3B ____________ 2C + D

This reaction is first under with respect to reactant A and second order with respect to reactant B . If the concentration of A is doubled and the concentration of B is halved, the rate of the reaction would _____ by factor of _____________

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Increase ,2

Decrease ,2

Increase ,4

Decrease ,4

Metal are

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Hard

Ductile

Malleable

All

The maximum number of electrons in first energy levels are.

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1

2

8

10

A molecule MX4 has a square planar shape, The number of non bonding pairs of electrons around M is .

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2

1

0

3

The plate height is the length of the column divide by

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Length of the column

Width of the column

Number of theoretical plates

Number of components of the mixture.

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

Which of the following methods is the most common method for separation of liquid components from a mixture.

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Dialysis

Solvent extraction

Precipitation

Distillation

Which of the following is class of nanorods

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metals

alloys

Metal oxide and Metal sulphite

All of the above

In which of the following species the bonds are non directional.

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NCl3

RbCl

BeCl2

BCl3

A correct reaction mechanism for a given reaction usually is.

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The same as the balanced chemical equation

Obvious if its heat of reaction is known

Sometimes difficult to prove

Obvious if the activation energy is known

Which of the following substance is generally not considered an air polutant.

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CO

CO2

SO2

NO2

Which of the following compound will be optically active.

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Suceinic acid

Meso tartaric acid

Acetic acid

Lactic acid

During the preparation of soap the liquid separated by distillation is

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Sodium hydroxide

Oil

Fats

Glycerol

When two atoms of hydrogen combine to form a molecule of hydrogen gas the energy of the molecule.

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higher than that of the separate atoms

Equal to that of the separate atoms

Lower than that of the separate atoms

Sometimes lower and sometime higher.

The exchange equilibrium in gas chromatography depends on.

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Solubility or absorbability of he sample

The polarity of he stationary phase and analyte

The degree of H bonding

All above factors

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.

In a period, the element with biggest electron affinity belong to.

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Group 1

Group 2

Group 17

Group 18

The bromine produced on commercial scale may contain impurities of.

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Water

Chloride

iodine

All above

Any property whose magnitude is independent of the amount of substance present is called a/an

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Extensive property

Colligative property

Structural propety

Intensive property

The sugar present in RNA is

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D- ribose

D-Arabinose

D-Glucose

Deoxyribose

Which of the following expression is correct.

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C = n/RT

C = RT/n

RT = Cn

Cn = 1/RT

Which of the following is most acidic.

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Phenol

p-nitrophenol

o-Nitrophenol

m-Nitrophenol

When some quantity of electricity is passed though two electrolytic cells. The ratio of the mass of the products obtained at the cathode is the same as the ratio of their

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Densities

Atomic masses

Equivalent masses

Atomic numbers

Which of the following metals is the most abundant in the earth's crust.

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Mg

Ca

K

Na

Which of the following technique is not related to instrumental analysis.

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Optical method

Colorimetry

Polarography

Gravimetric analysis

Which of the following regions of the spectrum would be used to determine the structure of the crystalline solids.

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Microwave

X-rays

Visible

Infrared

The formula of Bauxite is.

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Al2O3

Al2 O3. 2H2O

AL2O3, H2O

Na3AIF6

Bryllium salts on hydrolysis give.

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Basic solutions

Acidic solutions

Neutral solutions

Amphoteric solutions.

In a system of designating wrought aluminum alloys a sour digit number is used what does the first digit indicate.

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The purity of aluminum

The identity of the alloy

The alloy group

All of above

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