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When a standard solution of NaOH is left in air for a few hours,

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Important Questions on Elements of Group 1 and Group 2

EASY
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
The metal that forms nitride by reacting directly with N2 of air is:
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:
EASY
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Dihydrogen is liberated when water reacts with
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Assertion (A): K, Rb and Cs form superoxides
Reason (R): The stability of superoxides increases form K to Cs due to decrease in lattice energy.
HARD
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Which of the following liberates O2 upon hydrolysis?
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
A s-block element (M) reacts with oxygen to form an oxide of the formula MO2. The oxide is pale yellow in colour and paramagnetic. The element (M) is:
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Sodium dissolves in liquid NH3 to give a deep blue solution. This is due to;
EASY
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
In which of the following reactions, hydrogen peroxide acts as an oxidizing agent?
EASY
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
The oxide of potassium that does not exist is
EASY
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
The order of stability for the super oxides is
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Which one of the following options is correct pertaining to the below transformations?
Na+NH3l⟶ Coloured solution ⟶ on standing X+Y
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Name a nitrate that does not yield corresponding metal oxide, nitrogen dioxide on heating.
EASY
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
The chemical nature of hydrogen peroxide is:
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Identify the weakest oxidizing agent among the following
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
When H2O2 is added to an acidified K2Cr2O7 solution
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Hydrogen peroxide in its reaction with KIO4 and NH2OH respectively, is acting as a
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
Hydrogen peroxide oxidises FeCN64-to FeCN63- in acidic medium, but reduces FeCN63-toFeCN64- in alkaline medium. The other products formed are, respectively
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
When sodium Na metal is dissolved in liquid ammonia NH3, it imparts a blue colour to the solution. This blue coloration is due to:
EASY
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
On combustion of Li, Na and K in excess of air, the major oxides formed, respectively, are:
MEDIUM
Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block
A metal on combustion in excess air forms X . X upon hydrolysis with water yields H2O2 and O2 along with another product. The metal is: