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A compound exists in the gaseous state b...

A compound exists in the gaseous state both as monomer A and dimer `A_(2)`. The M wt of monomer is 48. in an experiment 96 g of the compound was confiermed in vessel of 33.6 L and heated to `273^(@)C`. Calculate the pressure developed, if compound exists as a dimer to the extent of 50% by weight under the conditions

A

0.9 atm

B

4.0 atm

C

2.0 atm

D

1.0 atm

Text Solution

Verified by Experts

The correct Answer is:
C
(c) Wt. of compound is 96g. The compounds exists as 50% monomer and 50% dimer.
moles of monomer`=(48)/(48)=1`
moles of dimer`=(48)/(96)=0.5 `
`therefore P=(1.5xx0.0821xx(273+273))/(33.6)=2.00` atm
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A compound exists in the gaseous phase both as monomer (A) and dimer (A_(2)) The mo1 wt of A is 48 In an experiment 96g of compound was confined in a container of volume 33.6 litre and heated to 273^(@)C Calulate the pressure developed if the compound exists as dimer to the extent of 50% by weight under these conditions .

A compound exists in the gaseous phase both as monomer (A) and dimer (A_(2)) The mol wt of A is 48 In an experiment 96g of compound was confined in a container of volume 33.6 litre and heated to 273^(@)C Calulate the pressure developed if the compound exists as dimer to the extent of 50% by weight under samae these conditions .

Knowledge Check

  • The small size and high charge of Al^(3+) ion gives it a high charge density which is responsible for its tendency to show (a) covalency in its compounds in the gaseous state (b) high hydration energy which stabilizes its compounds in solution, and (c) high lattice energy of its compounds in the solid state. Thus aluminium can forms both covalent and ionic bond. Like halides of boron, halides of aluminium do not show back bonding because of increase in size of aluminium. Actually aluminium atoms complete their octets by forming dimers. Thus chloride and bromide of aluminium exist as dimers, both in the vapour state and in polar-solvents like benzene while the corresponding boron halides exists as monomer. In boron trihalides the extent of back bonding decreases with increases with increase in size of halogens and thus lewis acid character increases. All BX_(3) are hydrolysed by water but BF_(3) shows a different behaviour. The dimeric structure of aluminium chloride disappears when:

    A
    it dissolves in water
    B
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    C
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    D
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  • The small size and high charge of Al^(3+) ion gives it a high charge density which is responsible for its tendency to show (a) covalency in its compounds in the gaseous state (b) high hydration energy which stabilizes its compounds in solution, and (c) high lattice energy of its compounds in the solid state. Thus aluminium can forms both covalent and ionic bond. Like halides of boron, halides of aluminium do not show back bonding because of increase in size of aluminium. Actually aluminium atoms complete their octets by forming dimers. Thus chloride and bromide of aluminium exist as dimers, both in the vapour state and in polar-solvents like benzene while the corresponding boron halides exists as monomer. In boron trihalides the extent of back bonding decreases with increases with increase in size of halogens and thus lewis acid character increases. All BX_(3) are hydrolysed by water but BF_(3) shows a different behaviour. Which one of the following statements is correct ?

    A
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    B
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    C
    Aluminium halides make up the electron deficiency by bridging with halide or alkyl groups
    D
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  • The small size and high charge of Al^(3+) ion gives it a high charge density which is responsible for its tendency to show (a) covalency in its compounds in the gaseous state (b) high hydration energy which stabilizes its compounds in solution, and (c) high lattice energy of its compounds in the solid state. Thus aluminium can forms both covalent and ionic bond. Like halides of boron, halides of aluminium do not show back bonding because of increase in size of aluminium. Actually aluminium atoms complete their octets by forming dimers. Thus chloride and bromide of aluminium exist as dimers, both in the vapour state and in polar-solvents like benzene while the corresponding boron halides exists as monomer. In boron trihalides the extent of back bonding decreases with increases with increase in size of halogens and thus lewis acid character increases. All BX_(3) are hydrolysed by water but BF_(3) shows a different behaviour. Which of the following statements about anhydrous aluminium chloride is correct ?

    A
    It is an ionic compound.
    B
    It is not easily hydrolysed.
    C
    It sublimes at `100 ^(@)C` under vacuum.
    D
    It is a strong lewis base.

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