MEDIUM
Earn 100
Which pair of elements on combustion in air will give superoxides?
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Important Questions on Elements of Group 1 and Group 2
EASY
The metal that forms nitride by reacting directly with of air is:
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Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:
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Dihydrogen is liberated when water reacts with
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Assertion (A): and form superoxides
Reason (R): The stability of superoxides increases form to due to decrease in lattice energy.
HARD
Which of the following liberates upon hydrolysis?
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A s-block element (M) reacts with oxygen to form an oxide of the formula . The oxide is pale yellow in colour and paramagnetic. The element is:
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Sodium dissolves in liquid to give a deep blue solution. This is due to;
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Magnesium is burnt in the air to form and . When is hydrolyzed, and are formed. is the reactant in the manufacture of nitric acid by Ostwald's process. What is ?
EASY
The oxide of potassium that does not exist is
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The order of stability for the super oxides is
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Which one of the following options is correct pertaining to the below transformations?
Coloured solution
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Name a nitrate that does not yield corresponding metal oxide, nitrogen dioxide on heating.
EASY
The main oxides formed on combustion of Li, Na and K in excess of air are respectively:
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Identify the weakest oxidizing agent among the following
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Magnesium powder burns in air to give
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A piece of ribbon is heated to redness in nitrogen atmosphere and the treated with water. The gas evolved is
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The element whose salts cannot be detected by flame test is.
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When sodium metal is dissolved in liquid ammonia , it imparts a blue colour to the solution. This blue coloration is due to:
EASY
On combustion of and in excess of air, the major oxides formed, respectively, are:
MEDIUM
A metal on combustion in excess air forms . upon hydrolysis with water yields and along with another product. The metal is:
