Question

CANISRINSMUAT
6.
CHEMISTRY
A, B and C are hydroxy-compounds of the elements X, Y and Z respectively. X, Y and Z are in th
Non metal
same period of the periodic table. A gives an aqueous solution of pH less than seven. B reacts with both
strong acids and strong alkalis. C gives an aqueous solution which is strongly alkaline.
Which of the following statements is/are true ?
I: The three elements are metals.
The electronegativities decreases from X to Y to Z.
III: The atomic radius decreases in the order X, Y and Z.
IV:X, Y and Z could be phosphorus, aluminium and sodium respectively.
ADI, II, III only correct
B)I, III only correct
(C) II, IV only correct
(D) II, III, IV only correct​

Answer 1

Answer:

Option C , 2&4

Explanation:

Given,

A,B&C are hydroxy compounds of elements x, y& z

Now,

1) x-OH

↓

pH < 7

↓

acidic

↓

non-metal

↓

more electronegative

2) Y-OH

↓

Amphoteric

↓

electronegative in between

3) Z-OH

↓

pH> 7

↓

metal

↓

less electronegative

⭐the respective metals are p, Al and Na

⭐since, they belongs to same period size decreases from x >y>z

⭐hence, correct option is 2 & 4.

Answer 2

Answer:

option C is the answer

Explanation:

A is equal to X

B is equal to Y

C is equal to Z

hence C is answer to this question

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