M is an element in the form of a powder. M burns in oxygen and the product obtained is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences.

(a) If M is a metal, then the litmus will turn ...........

(b) If M is a non-metal, then the litmus will turn .........

(c) If M is a reactive metal, then ........... will be evolved when M reacts with dilute sulphuric acid.

(d) If M is a metal, it will form ........ oxide, which will form ....... solution with water.

(e) If M is a non-metal, it will not conduct electricity in the form of.........

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Solution

(a) Blue
(b) Red
(c) Hydrogen
(d) Basic, Alkaline
(e) Graphite

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Q. X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ___________.
(b) If X is a non-metal, then the litmus will turn _________.
(c) If X is a reactive metal, then _________ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non-metal, it will form _________ oxide, which will form _________ solution with water.
(e) If X is a non-metal, it will not conduct electricity unless it is carbon in the form of _________.

Q. X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. If X is a non metal, then the litmus will turn:

Q. If M is a reactive metal, then .................. will be evolved, when M reacts with dilute sulphuric acid.

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, Whcih 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 ?

(d) Write a balanced chemical equation for the reaction which takes when metal M reacts with water.

(e) Is this reaction exothermic or endothermic ?

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?

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(a) Blue (b) Red (c) Hydrogen (d) Basic, Alkaline (e) Graphite

(a) Blue
(b) Red
(c) Hydrogen
(d) Basic, Alkaline
(e) Graphite