<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> A metal (M) is stored under kerosene. When a small piece of it is left open in the air, it catches fire. When the product formed is dissolved in water, it turns red litmus to blue. (a) Name the metal (M). (b) Write the chemical equation for the reaction when it is exposed to air and when the product is dissolved in water.

Q. A magnesium ribbon is burnt in air to form a substance X. When X is dissolved in water, a new substance Y is formed. When Y is tested with red litmus paper, the colour of red litmus paper turns to blue. Then which of the following statements is not true?

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> When air is blown inside a test tube containing limewater, the limewater in it turns milky. What does this indicate?

Q. Assertion (A): Sodium metal is stored under kerosene.
Reason (R) : Metallic sodium melts when exposed to air

Q. The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.
(a) What is metal M?
(b) What is solution S? Is it acidic or alkaline?
(c) What is gas G?
(d) Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
(e) Is this reaction exothermic or endothermic?

Q.

A silvery-white metal X taken in the form of ribbon, when ignited, burns in air with a dazzling white flame to form a white powder Y, When water water is added to power Y, it dissolves partially to form another substance Z.

(a) What could metal X be ?

(b) What is power Y ?

(c) With which substance metal X combines to form powder Y ?

(d) What is substance Z ? Name one domestic use of substance Z.

(e) Write a balanced chemical equation of the reaction which takes place when metal X burns is air to form powder Y.