The relation between molecular wt. and vapour density is

Question

The relation between molecular wt. and vapour density is

A. Molecular wt. = $\frac{2}{3}$ V.D.

B. Molecular wt. = $\frac{1}{3}$ V.D.

C. Molecular wt. = V.D.

D. Molecualr wt = 2 x V.D.

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Arrange the following in order of increasing inter-molecular forces and boiling points: $N H_{3}$ ,He, $C l_{2}$

A. $H e < C l_{2} < N H_{3}$

B. $H e > C l_{2} > N H_{3}$

C. $C l_{2} < H e < N H_{3}$

D. $N H_{3} < H e < C l_{2}$

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At what temperature, the root mean square velocity of oxygen molecules is equal to that of $S O_{2}$ at 27°C?

A. 150°C

B. 150°K

C. 27°C

D. None of these

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Density of a gas relative to air is 2.3. If the average molar mass of air is 29.08/mol, the molecular mass of the gas will be

A. 29 gm/mole

B. 66.7 gm/mole

C. 12.67 gm/mole

D. 25.22 gm/mole

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In a unit cell of cesium chloride the arrangement of cesium ions is

A. face centred cubic

B. hexagonal close packed

C. body centred cubic

D. simple cubic

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The limiting radii ratio for the tetrahedral geometry is

A. 0.155

B. 0.444

C. 0.732

D. 0.225

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What types of forces are present in molecular solids?

A. electrovalent bonds

B. hydrogen bonds

C. metallic bonds

D. Van der Waal's forces

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Normal boiling points values are for $N H_{3}$ , - 34C, bromine 58°C, carbon tetrachloride 77°C and oxygen - 183°C. Which of these liquids has the highest vapour pressure at room temperature?

A. $N H_{3}$ ,

B. $B r_{2}$

C. $C C l_{4}$

D. $O_{2}$

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The number of N2 molecules present in 28 nitrogen is

A. 2 x 10

B. 6 x $^{10^{22}}$

C. 6 x $^{10^{23}}$ approximately

D. 5 x $^{10^{30}}$ approximately

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What is the vapour pressure of benzoyl chloride at its boiling point (197°C)?

A. 760 torr

B. 380 torr

C. 197 torr

D. None of these

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The V.D. of a gas is 11.2 gm. The volume occupied by 11.2 gm. of this gas at N.T.P. is

A. 12 litre

B. 11.2 litres

C. 2.24 litres

D. 22.4 litres

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When an ideal gas undergoes unrestricted expansion, no cooling occurs because the molecules

A. are above inversion temperature

B. exert no attractive force on each other

C. do work equal to loss in kinetic energy

D. collide without loss of energy

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Which of the following is an amorphous solid?

A. NaCl

B. $C a F_{2}$

C. Diamond

D. Glass

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Sodium chloride has fee structure. How many $N a^{+}$ and $C l^{-}$ ions are there in the unit cell?.

A. 6 and 6

B. 4 and 4

C. 1 and 1

D. 6 and 4

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The coordination number of each sphere in hcp arrangement is

A. 12

B. 8

C. 6

D. 4

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22.4 litre of any gas at N.T.P. will contain

A. One gram equivalent

B. One gram atomic weight

C. One gram atom

D. One gram molecule

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1.The correct relationship representing the volume occupied by 44 gm of $C O_{2}$ and 64 gm of $S O_{2}$ at constant temperahire and pressure:

A. V( $C O_{2}$ ) > V( $S O_{2}$ )

B. V( $C O_{2}$ ) = V( $S O_{2}$ )

C. V( $S O_{2}$ ) > V( $C O_{2}$ )

D. cannot be predicted

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Lattice energy of a solid is high if

A. the radii of the ions are large

B. radii of the ions are small

C. charge on the ions are small

D. the ions are neutral

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In what ratio by mass carbon monoxide and nitrogen should be mixed so that partial pressure exerted by each gas is same?

A. $m (N_{2}) = m (C O)$

B. $m (N_{2}) = 2 m (C O)$

C. $m (N_{2}) = 0.5 m (C O)$

D. None of these

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The wt. of 2.8 litres of a gas at N.T.P. is 3.50 gms. Its V.D. is

A. 20

B. 28

C. 32

D. 14

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5.At a given temperature and pressure 2 volumes of A combine with 5 volumes of B to form 2 volmes of C and 1 volume. A combine with one volume of B to form 2 volumes of D. The formula of C is

A. $A_{3} B_{6}$

B. $\sqrt{A B}$

C. $A_{2} B_{5}$

D. $A B_{5}$

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A vessel containing 10 litre of air at atmospheric pressure is connected to an evacuated 9 litre vessel The resulting pressure will be

A. 2 atm

B. 31 atm

C. 0.526 atm

D. 52.6 atm

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Which of the following statement wrong?

A. In solid state molecules, atoms or ions are held with a strong force of attraction and are in a fixed position

B. In liquid state the molecules, atom or ions are held with a strong force and have a restricted motion

C. In gaseous states, the molecules are randomly arranged and are apart from each other

D. Solid, liquid and gaseous states have different movement is particles

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Kinetic theory of gases postulates :

A. The molecules in a gas are in stationary state

B. The molecules in a gas exert appreciable attraction on each other

C. The molecules move in a random motion with widely different velocities

D. The molecules in a gas collide against each other as well as the wall of the container, but do not change their direction of motion

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An open vessel at 37°C is heated until 3/5 of the air in it has been expelled. Assuming that the volume of the vessel remains constant the temperature to which the vessel is heated is

A. 502°C

B. 502 K

C. 243.67°C

D. 925C

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The vapour density of pure ozone would be

A. 32

B. 8

C. 12

D. 24

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Volume occupied by 4.4 gift of carbon dioxide is

A. 4.4 litres

B. 2.24 litres

C. 22.4 litres

D. 4.48 litres

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Match box has the symmetry of which of the following systems?

A. Cubic

B. Orthorhombic

C. Tetragonal

D. Monoclinic

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Three dimensional array of points in space is called

A. unit cell

B. crystal lattice

C. micro-crystal

D. None of these

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Certain volume of a gas exerts on its walls some pressure at a particular temperature. It has been found that by reducing the volume of the gas to half its original value, the pressure becomes I twice that the initial value of constant temperature. This happens because

A. More number of a gas molecules strike the surface per second

B. Velocity of the gas molecules increases

C. Gas molecules attract each other

D. Weight of the gas increase with volume

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The ratio of RMS velocity to average velocity of a gas molecule at a particular temperature is

A. 1.086:1

B. 1:1.086

C. 2 :1.086

D. 1.086 : 2

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Accepted Answer

A. Molecular wt. =

\frac{2}{3}

V.D.

The relation between molecular wt. and vapour density is

Correct Answer :

Show all State of Matter MCQ

Related Questions

Arrange the following in order of increasing inter-molecular forces and boiling points: $N H_{3}$ ,He, $C l_{2}$

At what temperature, the root mean square velocity of oxygen molecules is equal to that of $S O_{2}$ at 27°C?

Density of a gas relative to air is 2.3. If the average molar mass of air is 29.08/mol, the molecular mass of the gas will be

In a unit cell of cesium chloride the arrangement of cesium ions is

The limiting radii ratio for the tetrahedral geometry is

What types of forces are present in molecular solids?

Normal boiling points values are for $N H_{3}$ , - 34C, bromine 58°C, carbon tetrachloride 77°C and oxygen - 183°C. Which of these liquids has the highest vapour pressure at room temperature?

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When an ideal gas undergoes unrestricted expansion, no cooling occurs because the molecules

Which of the following is an amorphous solid?

Sodium chloride has fee structure. How many $N a^{+}$ and $C l^{-}$ ions are there in the unit cell?.

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22.4 litre of any gas at N.T.P. will contain

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Lattice energy of a solid is high if

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The wt. of 2.8 litres of a gas at N.T.P. is 3.50 gms. Its V.D. is

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A vessel containing 10 litre of air at atmospheric pressure is connected to an evacuated 9 litre vessel The resulting pressure will be

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Certain volume of a gas exerts on its walls some pressure at a particular temperature. It has been found that by reducing the volume of the gas to half its original value, the pressure becomes I twice that the initial value of constant temperature. This happens because

The ratio of RMS velocity to average velocity of a gas molecule at a particular temperature is

Also checkout

The relation between molecular wt. and vapour density is

Correct Answer :

Show all State of Matter MCQ

Related Questions

Arrange the following in order of increasing inter-molecular forces and boiling points:NH3,He,Cl2

At what temperature, the root mean square velocity of oxygen molecules is equal to that of SO2 at 27°C?

Density of a gas relative to air is 2.3. If the average molar mass of air is 29.08/mol, the molecular mass of the gas will be

In a unit cell of cesium chloride the arrangement of cesium ions is

The limiting radii ratio for the tetrahedral geometry is

What types of forces are present in molecular solids?

Normal boiling points values are for NH3, - 34C, bromine 58°C, carbon tetrachloride 77°C and oxygen - 183°C. Which of these liquids has the highest vapour pressure at room temperature?

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What is the vapour pressure of benzoyl chloride at its boiling point (197°C)?

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When an ideal gas undergoes unrestricted expansion, no cooling occurs because the molecules

Which of the following is an amorphous solid?

Sodium chloride has fee structure. How many Na+ and Cl- ions are there in the unit cell?.

The coordination number of each sphere in hcp arrangement is

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Which of the following statement wrong?

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Match box has the symmetry of which of the following systems?

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Also checkout

Arrange the following in order of increasing inter-molecular forces and boiling points: $N H_{3}$ ,He, $C l_{2}$

At what temperature, the root mean square velocity of oxygen molecules is equal to that of $S O_{2}$ at 27°C?

Normal boiling points values are for $N H_{3}$ , - 34C, bromine 58°C, carbon tetrachloride 77°C and oxygen - 183°C. Which of these liquids has the highest vapour pressure at room temperature?

Sodium chloride has fee structure. How many $N a^{+}$ and $C l^{-}$ ions are there in the unit cell?.

1.The correct relationship representing the volume occupied by 44 gm of $C O_{2}$ and 64 gm of $S O_{2}$ at constant temperahire and pressure: