Chapter : 1. Metals & Non Metals
Important Terms And Concepts
11. Solubility of Oxides in water : Some metal oxides are soluble in water. Soluble base are called alkalies e.g.,
12. Alkalies : Those base, which are soluble in water are called alkalies. For example, sodium hydroxide (NaOH), potassium hydroxide (KOH), calcium hydroxide Ca(OH)2 etc. They turn phenolphthanlein pink and turn red litmus blue.
13. Basic Oxides : Those oxide, which react with acids or acidic or acidic oxides to form salt and water are called basic oxides. Metals react with oxygen to form metallic oxides which are generally basic in nature e.g., Na2O (sodium oxide), CaO (calcium oxide), K2O (potassium oxide), MgO (magnesium oxide) are basic oxides.
MgO + HCl → MgCl2 + H2O
14. Acidic oxides : Those oxides, which react with bases or basic oxides to form salt and water, are called acidic oxides. Non-metals react with oxygen to form non-metallic oxides which are generally acidic in nature, e.g., CO2 (carbon dioxide), SO2 (sulphur dioxide), SO3 (sulphur trioxide), P2O5 (phosphorus pentoxide), SiO2 (silicon dioxide) are acidic oxides.
CO2 + 2NaOH → Na2CO3 + H2O
12. Alkalies : Those base, which are soluble in water are called alkalies. For example, sodium hydroxide (NaOH), potassium hydroxide (KOH), calcium hydroxide Ca(OH)2 etc. They turn phenolphthanlein pink and turn red litmus blue.
13. Basic Oxides : Those oxide, which react with acids or acidic or acidic oxides to form salt and water are called basic oxides. Metals react with oxygen to form metallic oxides which are generally basic in nature e.g., Na2O (sodium oxide), CaO (calcium oxide), K2O (potassium oxide), MgO (magnesium oxide) are basic oxides.
MgO + HCl → MgCl2 + H2O
14. Acidic oxides : Those oxides, which react with bases or basic oxides to form salt and water, are called acidic oxides. Non-metals react with oxygen to form non-metallic oxides which are generally acidic in nature, e.g., CO2 (carbon dioxide), SO2 (sulphur dioxide), SO3 (sulphur trioxide), P2O5 (phosphorus pentoxide), SiO2 (silicon dioxide) are acidic oxides.
CO2 + 2NaOH → Na2CO3 + H2O
Trending Articles & Blogs
- Physics Tutor, Math Tutor Improve Your Child’s Knowledge
- How to Get Maximum Marks in Examination Preparation Strategy by Dr. Mukesh Shrimali
- 5 Important Tips To Personal Development Apply In Your Daily Life
- Breaking the Barriers Between High School and Higher Education
- 14 Vocational courses after class 12th
- Tips to Get Maximum Marks in Physics Examination
- Get Full Marks in Biology Class 12 CBSE
Download Old Sample Papers For Class X & XII
Download Practical Solutions of Chemistry and Physics for Class 12 with Solutions
Recent Questions Asked
- Newton’s laws of motion asked by Dr. Mukesh Shrimali
- Process of nutrition in Amoeba asked by Rajiv Sharma
- Importance of studying physics subject in school after 10th asked by Rajiv
- Refraction Through Prism in Different Medium asked by Kirti Sharma
- Ratio and Proportion Question asked by Education Desk
- Explain all the 12 tenses with example asked by Qwerty
- Refraction Through Prism in Different Medium asked by Seema Shrimali