Question

Write balanced equations for the reaction when :
(a) Al is treated with dilute HCI.
(b) Fe reacts with steam
(c) Cu reacts with silver nitrate solution.
(d) Mg is burnt in oxygen
(e) Chlorine gas is passed through sodium bromide solution.​

Answer 1

Explanation:

Al + HCL ➡ AlCl + H2

2AL + 2HCL ➡ 2AlCl + H2

Answer 2

Explanation:

AnSwEr :-

2 or -6.

Given :-

The distance between the points A(2, -2) and B(-1, x) is equal to 5.

To Find :-

Value of x

SoluTion :-

Here,

x1 = 2

y1 = -2

x2 = -1

y2 = x

Formula for finding distance between two points is :-

\sqrt{{(x2 - x1) {}^{2} } + (y2 - y1) {}^{2} }

(x2−x1)

2

+(y2−y1)

2

Put the values in the formula :-

√ (- 1 - 2)² + {x - (-2)}² = 5

→ √ { (-3)² + (x + 2)² } = 5

→ √{ 9 + (x + 2)² } = 5

→ 9 + (x + 2)² = 25

→ (x + 2)² = 16

→ x + 2 = ± 4

_____________________

x + 2 = 4

→ x = 4 - 2

→ x = 2

_____________________

x + 2 = - 4

→ x = - 4 - 2

→ x = - 6

Hence, the value of x is 2 or -6.

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