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Unit test-1:

Marks:20 Time: 35 minutes

( Take 20 seconds deep breath and start with full potential by saying I can, I win)

Q.1:

Which is/are the following statement (s) is correct for " borazine "?
i. It has a 6 B-H bond
ii. It has 3 N-H bonds
iii. It has 3 B=N bonds
iv. It has a cyclic structure
Choose the correct option:

(A) I, ii, iv,

(B) I, iii, iv

(D) ii, iii, iv

Q.2:

Lewis acidity: BF₃ > BCl₃ . It is due to
(Choose the correct option:)
A) Stronger 2p (B)- 2p(F) sigma bonding
B) Stronger 2p(B)-3p(Cl) sigma bonding
C) Stronger 2p(B)-3p (Cl) pi bonding
D) stronger 2p(B)-2p(F) pi bonding

Q.3:

Which is the correct acidity order(decree
-sing)?
BBr₃. BCl₃ BF₃
(I). (II) (III)
Choose the correct option:
A) III > II >I
B) I > III > II
C) III < I < II
D) I > II > III

Q.4:

Which of the following substituted silanes gives the cross-linked silicone polymer upon hydrolysis?
Choose the correct option:
A) Me₄Si
B) Me₂SiCl₂
C) Me₃SiCl
D) MeSiCl₃

Q.5:

The correct order for the ease of formation of the adduct, NH₃.BX₃ ( X = F/Cl/Br)
Choose the correct option:
A) III > II >I
B) I > III > II
C) III > I > II
D) I > II > III

Q.6:

Among the following, which does not produce any acids upon hydrolysis?
AsCl₃ , NCl₃ , PCl₃
Choose the correct option:
A) AsCl₃
B) NCl₃
C) NCl₃ and AsCl₃
D) PCl₃ and AsCl₃

Q.7:

Among the following oxides of nitrogen, the compounds having N-O-N bond is/are-
N₂O₃, N₂O₄, N₂O₅
Choose the correct option:
A) N₂O₃
B) N₂O₅
C) N₂O₄
D) N₂O₃ & N₂O₅

Q.8:

Which of the following produces two different acids upon hydrolysis?
Choose the correct option:
A) NCl₃
B) PCl₃
C) NCl₃ & AsCl₃
D) PCl₃ & AsCl₃

Q.9:

The oxides that contain N-N bonds is
Choose the correct option:
A) N₂O₃
B) N₂O₄
C) N₂O₅ and N₂O₃
D) N₂O₃ & N₂O₄

Q.10:

Which of the following is not hydrolyze?

NCl₃, NF₃, BiCl₃
Choose the correct option:
A) NCl₃ , BiCl₃
B) NF₃ and BiCl3 C ) NCl3 & NF3
D) NF3

Q.11:

The no of S-S bonds in H₂S₅O₆ is

Choose the correct option:
A ) 3
B ) 4
C ) 2
D) none

Q.12)

The 'C' will be -
Choose the correct option:

A ) Cl₃B₃N₃H₉
B ) [ClBNH]₃
C ) [HBNH]₃
D) (ClH)₃B₃N₃(ClH)₃

Q.13:

Which of the following is exist as dimer?
Choose the correct option:

A) P₂O₅
B) P₂O₃
C) A & B
D) none

Q.14:

The no of P-O-P bond(s )is (are) in P₂O₅
Choose the correct option:
A) 1
B) 3
C)6
D) 5

Q.15:

The no of P=O bond(s) in P₂O₃( in a stable form) is ( are ) Choose the correct option:
A ) 2
B ) 4
C) 3
D) none

Q.16:

The reagents required for the synthesis of cyclic phosphazene N₄P₄Cl₈ are
A ) PCl₅ & NH₃
B ) POCl₃ & NH₄Cl
C ) POCl₃ & NH₃
D ) PCl₅ & NH₄Cl

Q.17:

Which of the following statement(s) is(are) correct (given below) shown by NO?
i ) it combines with O to form N₂O
ii ) it's bond order = 2.5
iii ) it is diamagnetic in a gaseous state
iv) it is a neutral oxide.

Choose the correct option:
A ) i, ii, iii
B) i, ii, iv
C ) i, ii, iii, iv
D ) i, iii, iv

Q.18:

The coordination no of Al in liquid AlCl₃ is
Choose the correct option:
A) 6
B) 4
C) 3
D ) 8

Q.19:

The no of reaction that gives H₃PO₄ is ________ .
i. P₄O₆ + H₂O→
ii. PCl₅ + H₂O →
iii. P₄O₁₀ + H₂O→
Choose the correct option:
A) 0
B) 1
C) 2
D) 3

Q.20:

Which of the following contains ' O-O ' linkage?
Choose the correct option:
A ) H₂S₂O₃
B ) H₂S₂O₄
C ) H₂S₂O₇
D ) H₂S₂O₈

Answer key:

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