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Question 50 a...

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Question 50 (a)

An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound ammonia which has a characteristic pungent smell.

Identify the element X. How many valence electrons does it have?

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Solution

The element is Nitrogen (N) with atomic number 7 and it exists as a diatomic molecule ( $N_{2}$ ).
Its electronic configuration is 2,5 and it has 5 valence electrons.

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Q. Question 50 (b)
An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.

Draw the electron dot structure of the diatomic molecule of X. What type of bond is formed in it?

An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell. The element X is :

Q. An element 'X' has 5 electrons in its valence shell which is 'L' shell. It forms a binary compound with hydrogen. In its liquid state, intermolecular forces exist between the molecules. Name the type of forces:

Q. An element X combines with hydrogen to form a compound

N H_{3}

. The element X is placed on the right side of the periodic table. What is true about the element X?
(a) Has

3

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(b) Is a metal and is solid
(c) Is a non-metal and is a gas
(d) Has

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N H_{3}

reacts with water to form a basic compound.

Q. An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting.

(a) How many electrons would be there in the outermost shell of the element X?
(b) To which group of the periodic tables does the element X belong?
(c) Write the formula of the compound formed when X reacts with chlorine.

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