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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?


  1. Has two valence electrons
  2. It is a metal and is solid
  3. It is a non-metal and a gas
  4. Has five valence electrons
  5. 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 XH3 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 NH3 (ammonia).
When ammonia reacts with water, it yields  NH4OH, a basic compound.
NH3+H2 NH4OH.
 
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