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Covalent Bond

Among B2H6, B...

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Among $B_{2} H_{6}, B_{3} N_{3} H_{6}, N_{2} O, N_{2} O_{4}, H_{2} S_{2} O_{3} a n d H_{2} S_{2} O_{8},$ the total number of molecules containing covalent bond between two atoms of the same kind is:

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B_{2} H_{6}, B_{3} N_{3} H_{6}, N_{2} O, N_{2} O_{4}, H_{2} S_{2} O_{3} a n d H_{2} S_{2} O_{8},

the total number of molecules containing covalent bond between two atoms of the same kind is:

Q. How many of the following compounds has XX bonds i.e. single covalent bond between two same elements in their molecules :

H_{2} S_{2} O_{4}, H_{2} S_{2} O_{7}, H_{2} S_{2} O_{8}, N_{2} O, N_{2} O_{3}, N_{2} O_{4}, N_{2} O_{5}, {(H P O_{3})}_{3}

Q. Which among the following contains same number of molecules as in

22 g r a m s

N_{2} O

?

Q. Select the correct statement/s among the following?
(a) Order of bond length :

O_{2} < O_{2}^{+} < O_{2}^{- 2} < O_{2}^{+ 2}

d π - p π

S O_{2}

X e F_{2}, S O_{3}, X e F_{4}, S C l_{4},

have non-zero dipole moment
(d) Order of ionic nature

L i C l > N a C l > K C l > R b C L > C s C l

A B_{2} E_{2}

has square planar geometry
(f) Equal number of dative bonds in molecules are

N_{2} O, O_{3}, S O_{2}, B_{3} N_{3} H_{6}, [C u (N H_{3})_{4}] S O_{4}

(g) All electron deficient molecules of ‘B’ in

B_{2} H_{6}

s p_{2}

hybridization
(h) Central atom in a molecule has

6 b o n d e d p a i r s

0 l o n e p a i r s

then geometry is distorted octahedral geometry ___

Q. Fill in the blanks in the following sentences:
(i) Two atoms of the same element combine to form a molecule. The bond between them is known as ................ bond.
(ii) Two chlorine atoms combine to form a molecule. The bond between them is known as ..........
(iii) In forming oxygen molecule, .............. electrons are shared by each atom of oxygen.
(iv) In forming N₂ molecule, .............. electrons are shared by each atom of nitrogen.
(v) The number of single covalent bonds in C₂H₂ molecule are ...........
(vi) Melting points and boiling points of ionic compounds are generally ............ than those of covalent compounds.

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