+91-8076753736 support@wiredfaculty.com

Sponsor Area

Control And Coordination

Question

Wired Faculty App

In washing powders certain chemicals are added to impart the under-mentioned properties. Name the chemical used for each property.

(i) Keeps the dirt in water
(ii) Removes dust particles
(iii) Keeps the washing powder dry
(iv) Impart whiteness.

Solution

Washing powder contains only about 15–30% detergent by weight. The rest is made up of other chemicals added to impart it the desired property as given below:

(i) Carboxy methyl cellulose (CMC) is added to keep the dirt suspended in water.

(ii) Sodium tripolyphosphate is added to remove dust particles.

(iii) Sodium silicate is added to keep the washing powder dry.

(iv) Sodium borate is a mild bleaching agent and is added to impart whiteness.

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