EASY
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What happens when potassium reacts with sulphuric acid?

Important Questions on The s-Block Elements

MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
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:
EASY
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
Which one among the following metals is the weakest reducing agent?
EASY
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
The compound which does not exist is
MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
Identify the weakest oxidizing agent among the following
MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
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>The s-Block Elements>Group 1 Elements: Alkali Metals
Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:
MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
The number of alkali metal(s), from Li, K, Cs, Rb having ionization enthalpy greater than 400 kJ mol-1 and forming stable super oxide is
EASY
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
The metal mainly used in devising photoelectric cells is :
MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
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.
MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
Which one of the following options is correct pertaining to the below transformations?
Na+NH3l⟶ Coloured solution ⟶ on standing X+Y
EASY
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
The hottest region of Bunsen flame shown in the figure below is:


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MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
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>The s-Block Elements>Group 1 Elements: Alkali Metals
The main oxides formed on combustion of Li, Na and K in excess of air are respectively:
EASY
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
The metal that forms nitride by reacting directly with N2 of air is:
MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
The correct order of hydration enthalpies of alkali metal ions is:
HARD
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
Which of the following liberates O2 upon hydrolysis?
EASY
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
On combustion of Li, Na and K in excess of air, the major oxides formed, respectively, are:
MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Identify the correct statements about alkali metals.

A. The order of standard reduction potential (M+ | M) for alkali metal ions is Na > Rb > Li.

B. CsI is highly soluble in water.

C. Lithium carbonate is highly stable to heat.

D. Potassium dissolved in concentrated liquid ammonia is blue and paramagnetic.

E. All alkali metal hydrides are ionic solids.

Choose the correct answer from the options given below

EASY
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
Dihydrogen is liberated when water reacts with
MEDIUM
Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals
Name a nitrate that does not yield corresponding metal oxide, nitrogen dioxide on heating.