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HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Important Questions

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What is the action of Excess of chlorine on ammonia?

 

 

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Ammonia

What is the action of Na Metal on ammonia? 

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Ammonia

What is the action of the following reagents on ammonia :
Sodium metal

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Ammonia

Explain why Mn2+ ion is more stable than Mn3+? (Given : Mn→ Z=25)

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Oxides of Nitrogen

Write balanced chemical equations for action of potassium permanganate on Warm conc. sulphuric acid

 

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Oxides of Nitrogen

What is the action of hot/concentrated nitric acid on - Antimony.

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Nitric Acid

How is phosphine prepared using the following reagent?

H2SO4

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Phosphine

How is phosphine prepared using the following reagent?

Caustic soda

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Phosphine

The oxidation state of nitrogen in dinitrogen trioxide is ____

(a) + 1

(b) + 2

(c) + 3

(d) + 4

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: Concept of Group 15 Elements

Write balanced chemical equations for Phosphorus reacts with magnesium

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Compounds of Phosphorus

Write balanced chemical equations for Flowers of sulphur boiled with calcium hydroxide

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Compounds of Phosphorus

Write balanced chemical equations for Action of ozone on hydrogen peroxide.

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Compounds of Phosphorus

What is Nessler’s reagent?

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements >> Ammonia

Explain the geometry of [Cu(NH3)4]2+ on the basis of hybridisation [ At. No. Cu = 29 ]. 

Appears in 1 question paper
Chapter: [7.01] Group 15 Elements
Concept: Concept of Group 15 Elements

What are neutral oxides?

Appears in 1 question paper
Chapter: [7.02] Group 16 Elements
Concept: P - Block Group 16 Elements >> Simple Oxides

The molecular formula H2S2O2 represents which oxoacid?

  • Hydrosulphurous acid
  • Thiosulphurous acid
  • Sulphuric acid
  • Pyrosulphurous acid
Appears in 1 question paper
Chapter: [7.02] Group 16 Elements
Concept: P - Block Group 16 Elements >> Oxoacids of Sulphur

Explain the structure of sulphur dioxide.

Appears in 1 question paper
Chapter: [7.02] Group 16 Elements
Concept: P - Block Group 16 Elements >> Sulphur Dioxide

Write the molecular formula and structure of dithionic acid.

Appears in 1 question paper
Chapter: [7.02] Group 16 Elements
Concept: P - Block Group 16 Elements >> Oxoacids of Sulphur

Write molecular formula and structure of Pyrosulphuric acid 

Appears in 1 question paper
Chapter: [7.02] Group 16 Elements
Concept: P - Block Group 16 Elements >> Oxoacids of Sulphur

Write molecular formulae and structures of the Dithionous acid

Appears in 1 question paper
Chapter: [7.02] Group 16 Elements
Concept: P - Block Group 16 Elements >> Oxoacids of Sulphur
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