Equal weights of methane and hydrogen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by methane is

Question

Equal weights of methane and hydrogen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by methane is

A. 1/2

B. 1/3

C. 1/9

D. 8/9

Correct Answer :

C. 1/9

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A liquid of density 1.742 g $c m^{- 3}$ is observed to show a capillary rise of 73 mm in a tube of radius 0.65 mm. Then the surface tension of the liquid is

Discuss this answer

One mole of gas is defined as

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In a dose packed arrangement of N spheres, the number of tetrahedral holes are

A. N

B. 2N

C. N/2

D. $N_{2}$

Discuss this answer

Kinetic theory of gases postulates :

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Vapour density of a gas is 35.5. The volume occupied by 3.55 gm of the gas at NTPis

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The vapour density of a gas in 35.5. The volume occupies by 3.55 gms of the gas at N.T.P. is

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Of the following properties, the magnitude of one must always increase with temperature. The property is

Discuss this answer

7.Which of the following sets of conditions represent the easiest way to liquefy a gas?

Discuss this answer

In a closed packed structure the pattern ABAB...... represents which one of the following:

A. ccp

B. hcp

C. fccp

D. bcc

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The number of molecules in 32 gms of oxygen in

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The number of atoms in 0.004 gm of magnesium is close to

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In a close packed arrangement of N spheres, the number of octahedral holes are

A. N

B. 2N

C. 4N

D. 8N

Discuss this answer

The vapour density of pure ozone would be

A. 32

B. 8

C. 12

D. 24

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

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The number of atoms per unit cell in simple cubic, face centred cubic and body centred cubic arrangement are, respectively

A. 8,14,9

B. 1,2,4

C. 1,4,2

D. 8,4, 2

Discuss this answer

In a face centred cubic arrangement of ions, the coordination number of ions is

A. 6

B. 8

C. 12

D. 4

Discuss this answer

A closed vessel contains equal number of molecules of a total pressure at 740 mm. If oxygen is removed from the system the pressure will

Discuss this answer

If the temperature and pressure remain unchanged the volume of $O_{2}$ obtained by the decomposition of a certain volume of $S O_{2}$ will be

Discuss this answer

Which of the following methods is used to determine the atomic weight?

Discuss this answer

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

Discuss this answer

The best electrical conductor of the following is

B. Si(s)

Discuss this answer

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure:

Discuss this answer

The average kinetic energy of the molecule of $S O_{2}$ (moL wt. = 64) at 27°C is E. Then the average kinetic energy of $C O_{2}$ at 27°C is

C. E

D. 22E

Discuss this answer

The number of molecules is 4.25 g of ammonia are approximately

Discuss this answer

In anti-fluorite structure the negative ions

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How many moles of water are present in 180 gm. of water ?

A. 11

B. 5

C. 90

D. 21

Discuss this answer

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

A. $A B_{5}$

D. $A B$

Discuss this answer

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

Discuss this answer

The space occupied by spheres in ccp arrangement is

A. 74.06%

B. 68.05%

C. 60.4%

D. 52.4%

Discuss this answer

The molecular velocity of any gas is

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Answer 1

A. 4.1 x

^{10^{- 2}}

dynes

c m^{- 1}

Answer 2

B. 4.1 x

10^{3}

dynes

c m^{- 1}

Answer 3

C. 7.1 x

10^{- 3}

dynes

c m^{- 1}

Answer 4

D. None of these

Answer 5

A. The number of molecules in 22.4 litres of gas at S.T.P

Answer 6

B. The number of molecules contained | in 6 grams of 12 C isotope

Answer 7

C. The number of molecules in one formula weight of gas

Answer 8

D. The number of molecules in litre of gas

Answer 9

A. The molecules in a gas are in stationary state

Answer 10

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

Answer 11

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

Answer 12

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

Answer 13

A. 1.12 litres

Answer 14

B. 2.24 litres

Answer 15

C. 22.4 litres

Answer 16

D. 11.2 litres

Answer 17

A. 224 litres

Answer 18

B. 2.24 litres

Answer 19

C. 11.12 litres

Answer 20

D. 1.12 litres

Answer 21

A. vapour pressure

Answer 22

B. density

Answer 23

C.

∆ H_{v a p}

Answer 24

D. surface tension

Answer 25

A. Low temperature and high pressure

Answer 26

B. High temperature and low pressure

Answer 27

C. High temperature and low pressure

Answer 28

D. None of these

Answer 29

A. 6.02 x

^{10^{10}}

Answer 30

B. 3.2 x

^{10^{23}}

Answer 31

C. 6.02 x

^{10^{22}}

Answer 32

D. 32 x

^{10^{10}}

Answer 33

A. 36x

^{10^{5}}

Answer 34

B.

^{10^{20}}

Answer 35

C. 5 x

^{10^{20}}

Answer 36

D. 6.02 x

^{10^{23}}

Answer 37

A. face centred cubic

Answer 38

B. hexagonal close packed

Answer 39

C. body centred cubic

Answer 40

D. simple cubic

Answer 41

A. become half of 740 mm

Answer 42

B. remain unchanged

Answer 43

C. become 1/9 of 740 mm

Answer 44

D. become double of 740 mm

Answer 45

A. Triple the volume of

S O_{2}

Answer 46

B. Half the volume of

S O_{2}

Answer 47

C. Equal to the volume of

S O_{2}

Answer 48

D. One third the volume of

S O_{2}

Answer 49

A. Victor Meyer's method

Answer 50

B. Dumas' method

Answer 51

C. Cannizaro's method

Answer 52

D. None of these

Answer 53

A. 1.086:1

Answer 54

B. 1:1.086

Answer 55

C. 2 :1.086

Answer 56

D. 1.086 : 2

Answer 57

A.

C O_{2}

(s)

Answer 58

C. NaCl (fused)

Answer 59

D.

B r_{2}

(I)

Answer 60

A. critical temperature

Answer 61

B. Boyle's temperature

Answer 62

C. inversion temperature

Answer 63

D. reduced temperature

Answer 64

A.

\frac{E \times 64}{44}

Answer 65

B.

\frac{E \times 44}{64}

Answer 66

A. 3.5 x

^{10^{23}}

Answer 67

B. 2.5 x

^{10^{23}}

Answer 68

C. 1.5 x

^{10^{23}}

Answer 69

D. 0.5 x

^{10^{23}}

Answer 70

A. occupy tetrahedral voids

Answer 71

B. occupy octahedral voids

Answer 72

C. are arranged in ccp

Answer 73

D. are arranged in hcp

Answer 74

B.

A_{5} B_{2}

Answer 75

C.

A_{2} B_{5}

Answer 76

A.

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

Answer 77

B.

H e > C l_{2} > N H_{3}

Answer 78

C.

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

Answer 79

D.

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

Answer 80

A. proportional to absolute temperature

Answer 81

B. proportional to the square root of absolute temperature

Answer 82

C. independent of temperature

Answer 83

D. proportional to die square of absolute temperature

Equal weights of methane and hydrogen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by methane is

Correct Answer :

Show all State of Matter MCQ

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Show all State of Matter MCQ

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