P - Block Elements Test

Result

P - Block Elements Test - 76

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following is not linear?

A
CO₂

B
ClO₂

C

D
None of these
Question 2
4 / -1

Halon – 1301 is

A
CCl₂F. CClF₂

B
C₂F₄Br₂

C
CCl₃F

D
CF₃Br
Question 3
4 / -1

In the oxoacids of chlorine Cl – O bond contains

A
dπ − dπ Bonding

B
pπ − dπ Bonding

C
pπ − pπ Bonding

D
None of the above
Question 4
4 / -1

The statements that is not correct is

A
hypophosphorous acid reduces silver nitrate to silver

B
in solid state PCl₅ exists as [ PCl₄ ]⁺ [ PCl₆ ]^-

C
pure phosphine is non-inflammable

D
phosphorus acid on heating disproportionates to give metaphosphoric acid and phosphine

Solution
Question 5
4 / -1

The molecule BF₃ and NF₃ both are covalent compounds, but BF₃ is non-polar and NF₃ is polar.
The reason is that

A
boron is a metal and nitrogen is a gas in uncombined state

B
BF₃ bonds have no dipole moment whereas NF₃ bond have dipole moment

C
atomic size of boron is smaller than that of nitrogen

D
BF₃ is symmetrical molecule whereas NF₃ is unsymmetrical

Solution
Question 6
4 / -1

The structural formula of hypophosphorous acid is

A

B

C

D

Solution
Question 7
4 / -1

Match the Column I (Molecules) with Column II (Boiling points) and select the correct answer.

A
A = 3, B = 2, C = 5, D = 4, E = 1

B
A = 5, B = 3, C = 2, D = 4, E = 1

C
A = 1, B = 4, C = 5, D = 2, E = 3

D
A = 1, B = 2, C = 3, D = 4, E = 5

Solution
Question 8
4 / -1

Reaction of HNO₃ with I,S,P and C gives respectively

A
HIO₃ , H₂SO₄ , H₃PO₄ and CO₂

B
HIO₃ , H₂SO₄ , H₃PO₃ and CO₂

C
HIO₂ , H₂SO₄ , H₃PO₄ and CO

D
I₂O₅ , SO₂ , P₂O and CO₂

Solution
Question 9
4 / -1

The following are some statements related to VA group hydrides.
I. Reducing property increases from NH₃ to BiH₃.
II. Tendency to donate lone pair decreases from NH₃ to BiH₃.
III. Thermal stability of hydrides decreases from NH₃ to BiH₃.
IV. Bond angle of hydrides decreases form NH₃ to BiH₃.
The correct statements are

A
I, II, III and IV

B
I, III and IV

C
I , II and IV

D
I and IV

Solution
Question 10
4 / -1

Which one is correct statement ?

A
Basicity of H₃ PO₄ and H₃ PO₃ is 3 and 3 respectively

B
Acidity of H₃ PO₄ and H₃ PO₃ is 3 and 3 respectively

C
Acidity of H₃ PO₄ and H₃ PO₃ is 3 and 2 respectively

D
Basicity of H₃ PO₄ and H₃ PO₃ is 3 and 2 respectively

Solution