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P-Block Elements (n & O Family) formulas

Master P-Block Elements (n & O Family) through 14 JEE Advanced-level formulas, systematically structured with every variable spelled out. Revise concept-wise, identify the areas where you need improvement, and focus your preparation with greater precision.

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P-Block Elements (n & O Family), every formula

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Group 15 configuration
$n s^{2} n p^{3}$
Q1MCQGroup 15
The valence configuration of group-15 elements is:
- A
  $ns^{2}np^{3}$
- B
  $ns^{2}np^{4}$
- C
  $ns^{2}np^{5}$
- D
  $ns^{2}np^{2}$
Group 16 configuration
$n s^{2} n p^{4}$
Q1MCQGroup 16
The valence configuration of group-16 elements is:
- A
  $ns^{2}np^{4}$
- B
  $ns^{2}np^{3}$
- C
  $ns^{2}np^{5}$
- D
  $ns^{2}np^{6}$
Common oxidation states (N)
$- 3 to + 5$
Q1MCQN oxidation states
Nitrogen shows oxidation states ranging from:
- A
  $-3$ to $+5$
- B
  $0$ to $+5$
- C
  $-3$ to $0$
- D
  $+1$ to $+3$
Ammonia geometry
$pyramidal, s p^{3}$
Q1MCQAmmonia geometry
The geometry of $NH_3$ is:
- A
  pyramidal
- B
  planar
- C
  linear
- D
  tetrahedral
Nitric acid
$H N O_{3} (strong oxidising acid)$
Q1MCQHNO3
Nitric acid is a strong:
- A
  oxidising acid
- B
  reducing acid
- C
  weak base
- D
  neutral compound
Allotropes of phosphorus
$white, red, black$
Q1MCQP allotropes
Which is an allotrope of phosphorus?
- A
  white phosphorus
- B
  graphite
- C
  ozone
- D
  rhombic sulphur
Ozone
$O_{3} (bent, s p^{2})$
Q1MCQOzone shape
The shape of the ozone molecule is:
- A
  bent
- B
  linear
- C
  trigonal planar
- D
  tetrahedral
SO2 nature
$acidic oxide$
Q1MCQSO2
Sulphur dioxide is a(n):
- A
  acidic oxide
- B
  basic oxide
- C
  neutral oxide
- D
  metal
H2SO4 (king of chemicals)
$strong dibasic acid, dehydrating agent$
Q1MCQH2SO4
Sulphuric acid is often called the:
- A
  king of chemicals
- B
  queen of gases
- C
  noble acid
- D
  weak acid
Acidic strength of hydrides (group 16)
$H_{2} O < H_{2} S < H_{2} S e < H_{2} T e$
Q1MCQAcidic hydrides 16
The acidic strength of group-16 hydrides is:
- A
  $H_2O<H_2S<H_2Se<H_2Te$
- B
  $H_2O>H_2S>H_2Se$
- C
  all equal
- D
  $H_2Te<H_2S$
Basic strength of hydrides (group 15)
$N H_{3} > P H_{3} > A s H_{3} > S b H_{3}$
Q1MCQBasic hydrides 15
The basic strength of group-15 hydrides is:
- A
  $NH_3>PH_3>AsH_3>SbH_3$
- B
  $PH_3>NH_3$
- C
  all equal
- D
  $SbH_3>NH_3$
Oxidising power (group 15 +5 oxide)
$increases down the group$
Q1MCQOxidising +5
The oxidising power of the $+5$ oxide down group 15:
- A
  increases
- B
  decreases
- C
  is constant
- D
  is zero
Inert pair effect
$lower oxidation state stable for heavier elements$
Q1MCQInert pair
The inert pair effect makes the lower oxidation state:
- A
  more stable for heavier elements
- B
  less stable
- C
  unchanged
- D
  impossible
Catenation (O vs S)
$S shows more catenation than O$
Q1MCQCatenation
Which element shows greater catenation?
- A
  sulphur
- B
  oxygen
- C
  neon
- D
  helium

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P-Block Elements (n & O Family) formulas

P-Block Elements (n & O Family), every formula

Group 15 configuration

Group 16 configuration

Common oxidation states (N)

Ammonia geometry

Nitric acid

Allotropes of phosphorus

Ozone

SO2 nature

H2SO4 (king of chemicals)

Acidic strength of hydrides (group 16)

Basic strength of hydrides (group 15)

Oxidising power (group 15 +5 oxide)

Inert pair effect

Catenation (O vs S)

More JEE Advanced Chemistry formula sheets

Other ways to revise this chapter

Preparing students for India’s top institutes

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