Question

An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be
(a) S
(b) Ca
(c) C
(d) Ag

Answer 1

Answer:

When the Element E is turning Phenolphthalein solution into Pink then the Solution is Most likely to be Basic so According to the Options the answer is (a) S which Stands

Sodium because it is a Metal and it releases Basic Oxide which Turns Phenolphthalein to Pink.

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Answer 2

An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be Ca.

Explanation:

2 Ca (s)   +   2 H2O (l) →       2CaOH (aq)            +           H2

    Calcium            Water          Calcium Hydroxide         Hydrogen gas

                                                 (basic)

• During acid-base titrations, Phenolphthalein, a chemical compound with a formula, C20H14O4 is used as an indicator which turns an acidic solution into colourless and a basic solution into pink.  It is denoted as “Hln” or “phph”.  
• Here, calcium that is element E is a metal which reacts with water to form calcium hydroxide [Ca(OH)2] solution which is a base. So, the solution turns the phenolphthalein solution to pink due to its basic nature.

You can get all the answers of Chapter 3 in the link below:

https://brainly.in/question/13880470

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