+91-8076753736 support@wiredfaculty.com

Sponsor Area

Control And Coordination

Question

Wired Faculty App

Write a note on pH scale.

Solution

A measure of acidity or alkalinity of water soluble substance ( pH stands for potential of hydrogen). A pH value is a number from 1 to 14 with 7 as the middle (neutral) point. Values below 7 indicate acidity which increases as the number decrease, 1 being the most acidic values above 7 indicate alkalinity which increases as the number increase, 14 being the most alkaline.

pH value	Nature of solution
0–2	Strongly acidic
2–4	Moderately acidic
4–7	Weakly acidic
7	Neutral
7–10	Weakly basic
10–12	Moderately basic
12–14	Strongly basic

Some More Questions From Control and Coordination Chapter

How do metals react with bases?

What is a neutralization reaction? Give some examples.

What are non-metallic oxides? Substantiate your answer.

Take 5 ml hydrochloric acid in a boiling tube or a conical flask. Add a few pieces of zinc granules to it.

(a) What do you observe on the surface of zinc granules?
(b) Name the gas evolved.
(c) What happens when the above gas is passed through soap solution?
(d) What happens when a burning candle is brought near the gas filled tube?

Name four acids and bases. Write their formulae.

Name the various kind of oxides and mention their properties.

What are acids? How are they produced?

Mention important characteristics of acids.

Why the vessels of copper and brass need ‘Kalai’?

How can you test the presence of an acid in any substance?

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation