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HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions for Chemistry

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What is the action of Excess of air 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 : 
Nessler's reagent

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

Explain brown ring test with the help of chemical equation

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

Write balanced chemical equations for action of potassium permanganate on: Hydrogen

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

Draw the structure of: Pyrophosphoric acid

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

Fe2+ ions react with nitric oxide formed from reduction of nitrate and yields a brown  coloured complex _____________.

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 ?
HCl

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

Which of the following is a basic oxide?

(A) SiO2

(B) P4O10

(C) MgO

(D) Al2O3

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

The group 15 element having inner electronic configuration as of argon is-

(a) Phosphorous (z = 15)

(b) Antimony (z =51)

(c) Arsenic (z = 33)

(d) Nitrogen (z = 7)

 

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

Calculate molarity and molality of 6.3% solution of nitric acid having density 1.04 g cm−3
. (H = 1, N = 14, O = 16)

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

Draw the structure of H4P2O6 hypophosphoric acid

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

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
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