ICSE Class 10 Chemistry Case Study based questions – Acids, Bases and Salts
On this page we have given ICSE Class 10 Chemistry Chapter 3 Case Study based questions – Acids, Bases and Salts. From 2024 Board exam, ICSE will focus on Technical Based, Analytical Based and Critical Questions in Chemistry Exam. So we Net Ex, has started giving Case Study based questions which is also known as Paragraph Based Questions.
Que No. 1 –
Table salt [sodium chloride] turns moist and ultimately forms a solution, on exposure to air [especially during the rainy season].
1.) Due to which phenomenon above condition of salt is observed and explain the phenomenon ?
2.) Give any three examples of Examples of deliquescent substances.
3.) The commercial version of the salt contains which kind of impurities ?
Que No. 2 –
Acids are defined as compounds which contain one or more hydrogen atoms and when dissolved in water, produce hydronium ions the only positively charged ions. Acids may be organic, Inorganic and they can be classified according to their basicity also.
1.) Define organic and inorganic acids ?
2.) What are the three types of acids depending on their basicity?
3.) Write each two examples of oxyacid’s and hydracid.
Que No. 3 –
Salt is a compound formed by the partial or total replacement of the ionizable hydrogen atom of an acid by a metallic ion or an ammonium ion. Salt can be classified as six types and they are prepared by direct combination method.
1.) Name the six types in which salt can be classify.
2.) Explain preparation of salt by direct combination method.
3.) What are double salts and give two examples of double salts.
Answers
Que No. 1 Answers-
1.) Deliquescence is the phenomenon due to which above condition of salt is observed. Certain water-soluble substances, when exposed to the atmosphere at ordinary temperature, absorb moisture from the atmospheric air to become moist, and ultimately dissolve in the absorbed water, forming a saturated solution. Such a substance is called a deliquescent substance, and the phenomenon is called deliquescence.
2.) Examples of deliquescent substances are Caustic soda (NaOH), Caustic potash (KOH), Magnesium chloride (MgCl).
3.) The commercial version of the salt contains impurities, like magnesium chloride and calcium chloride, which are deliquescent substances .
Que No. 2 Answers-
1.) 1)The acids which are obtained from plants are called organic acid, they contain carbon and hydrogen. 2) Acids which are obtained usually from minerals are known as inorganic acids. They do not contain carbon
2.) The three types of acids depending on their basicity are 1) Monobasic acid 2) Dibasic acid 3) tribasic acid.
3.) The examples of oxyacid’s are Nitric acid and sulphuric acid and the examples of hydracid are hydrochloric acid and hydrobromic acid.
Que No. 3 Answers-
1.) Classification of salts- There are six kinds of salts1. Normal salts 2. Acid salts 3. Basic salts 4. Double salts 5. mixed salts 6. Complex salts
2.) Salt can be prepared by direct combination of metal and non metal. For example molten sodium metal mixed with chlorine to form sodium chloride salt.
3.) Double salts are formed by the union of two simple salts that dissolve in water and crystallize together.
Examples – Potash alum, Mohr’s salt, Dolomite.
Also See: Previous Chapter Case Based Questions
