Identify the Following Substance: a Brown Gas D with Irritating Smell.

Identify the following substance:

A brown gas D with the irritating smell.

One Word/Term Answer

Nitrogen dioxide.

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Chapter 9: Practical Work - Exercise 9 (C) [Page 153]

Chapter 9 Practical Work
Exercise 9 (C) | Q 8.4 | Page 153

Write down the formulae of sodium sulphide.

State the chemical symbols for the following elements :

Sodium, Potassium, Iron, Copper, Mercury, Silver.

What do the symbols, H₂, S and O₄ mean in the formula H₂SO₄ ?

The atomicities of ozone, sulphur, phosphorus and argon are respectively :

Name the following compounds. Also write the symbols/formulae of the ions present in them :

Define ‘formula unit’ of an ionic compound. What is the formula unit of (i) sodium chloride, and
(ii) magnesium chloride ?

The formula of a compound is X3Y. The valencies of elements X and Y will be respectively :

Complete the following statement by selecting the correct option :

The correct formula of aluminium oxide is

Give the empirical formula of Acitic Acid CH₃COOH.

XCl₂ is the chloride of a metal X. State the formula of the sulphate and the hydroxide of the metal X.

Name the element in the compound and give the formula of the following compound:

Phosphoric acid

Name the element in the compound and give the formula of the following compound:

Blue vitriol

Name the element in the compound and give the formula of the following compound:

Ethane