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Q.

To create the combination XH3, an element X interacts with hydrogen. On the right side of the periodic chart is the element X.

Which of the following statements is correct for element X?

Has two valence electrons
It is a metal and is solid
It is a non-metal and a gas
Has five valence electrons
XH3 reacts with water to form a basic compound

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a

I, II and III

b

II, III, and IV

c

III, IV and V

d

V, I and II

answer is C.

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Detailed Solution

detailed_solution_thumbnail

Correct statements for element X have five valence electrons, is a non-metal and a gas and

X H_{3}

reacts with water to form a basic compound.
The element described here tends to be nitrogen with atomic number 7. It lies on the right side of the periodic table and is a gas.
Electronic configuration of N = 2, 5 with 5 valence electrons.
So, it gains 3 electrons to complete its octet and act as a non-metal;
N reacts with hydrogen to form

{NH}_{3}

(ammonia).
When ammonia reacts with water, it yields

{NH}_{4} OH

, a basic compound.

{NH}_{3} + H_{2} O \to {NH}_{4} OH

.

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To create the combination XH3, an element X interacts with hydrogen. On the right side of the periodic chart is the element X. Which of the following statements is correct for element X?Has two valence electronsIt is a metal and is solidIt is a non-metal and a gasHas five valence electronsXH3 reacts with water to form a basic compound