EASY
Earn 100

Give the chemical reaction that shows the hydrolysis of peroxides alkali metal with cold water.

Important Questions on The s-Block Elements

MEDIUM
On strong heating, the nitrate of which metal does not produce nitrogen dioxide?
HARD
Which of the following salt would give SO2 with hot and dil H2SO4 and also decolourises Br2 water?
EASY

In the following reaction, the total number of oxygen atoms in X and Y is______ 

Na2O+H2O2X

Cl2O7+H2O2Y

HARD
Lithium nitrate and sodium nitrate, when heated separately, respectively, give
MEDIUM
Upon the addition of a solution A to a strongly acidified solution of barium nitrate, a white precipitate was obtained which did not dissolve even after large addition of water. Solution A contained
MEDIUM

AΔB+C

Both A and B releases same gas D and forms Na2ZnO2, when they are treated with zinc metal in the presence sodium hydroxide.
 Identify the incorrect statement for the above reactions.

MEDIUM

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

MEDIUM
Which one of the following on hydrolysis gives the corresponding metallic hydroxide, H2O2 and O2?
EASY
Find out the oxidation state of sodium in Na 2 O 2 .                 
MEDIUM
What are the products formed when an aqueous solution of magnesium bicarbonate is boiled?
HARD
Starting with sodium chloride how would you proceed to prepare sodium peroxide?
MEDIUM
When a substance A reacts with water, it produces a combustible gas B and a solution of a substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming. D can produce B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. A, B, C and D, respectively, are
MEDIUM
KO2 (potassium superoxide) is used in oxygen cylinders in space and submarines because of it