Question

Answer the following questions.
Q1. Give the colours of Sodium and Potassium if their salts are tested in the flame test.

Q.2 What gas is given off when alkali metal is reacted with water? Write down the test for identification of gas.

Q.3 Write a balanced equation for the reaction of Sodium with Aluminium Chloride.

Q.4 Write a balanced chemical equation for the reaction occurring on the cathode in Hall Heroult process

Q.5 What do you understand by the term slag? Explain using a suitable example.

Q.6 What are the two oxidation states (valences) of Iron in its compounds?

Q.7 Iron corrodes to form rust, Write the chemical formula of rust. What is meant by sacrificial protection method?

Q.8 How is limestone used in Iron production?

Q.9 What are the conditions needed to ensure the Haber process works efficiently?

Q.10 Give the chemical formula of Cryolite. What is the role of cryolite in the extraction of Aluminium?

Most answers correct gets a brainly mark

Answer 1

Answer:

Flame tests are used to identify the presence of a relatively small number … ... Not all metal ions give flame colors. ... Practical Details in Carrying out Flame Tests.