Advertisements
Advertisements
प्रश्न
A salt is dissolved in water and the pH of this salt solution is measured with a universal indicator paper. If the pH of solution is less than 7, the salt is most likely to be ______.
विकल्प
CH3COONa
Na2CO3
KCl
NH4Cl
Advertisements
उत्तर
A salt is dissolved in water and the pH of this salt solution is measured with a universal indicator paper. If the pH of solution is less than 7, the salt is most likely to be NH4Cl.
Explanation:
A pH of less than 7 indicates the solution is acidic, characteristic of an acidic salt. Ammonium chloride (NH4Cl) is formed from a strong acid (HCl) and a weak base (NH4OH). In water, ammonium ions undergo cationic hydrolysis, releasing excess hydronium ions (H3O+), thereby lowering the pH and turning the universal indicator paper yellow, orange, or red.
APPEARS IN
संबंधित प्रश्न
State what would you observe when Washing Soda Crystals are exposed to the atmosphere
From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:
[AgCl, MgCl2, NaHSO4, PbCO3, ZnCO3, KNO3, Ca(NO3)2]
On heating this salt, a brown colored gas is evolved.
Give one word or a phrase:
The property by which certain hydrated salts, when left exposed to atmosphere, lose their water of crystallization and crumble into powder.
The salt prepared by the method of direct combination is _______.
Write a balanced equation for the preparation of the following salt:
Zinc carbonate from zinc sulphate.
What are the two main ways in which common salt (sodium chloride) occurs in nature?
What name is given to the common salt which is mined from underground deposits? How was this salt formed?
Common salt is obtained from sea-water by the process of ______.
Why is the electrolysis of a concentrated solution of sodium chloride known as chlor-alkali process?
Name three products of the chlor-alkali process. State two uses of each of these products.
Which of the following salts will give an aqueous solution having pH of almost 7?
Write the name and formula of one salt which contains:
Five molecules of water of crystallisation.
Name the particles present in :
Strong electrolyte
Name two carbonates which do not produce carbon dioxide on heating.
Name gases which has a sour taste.
Distinguish by a chemical test sodium chloride and sodium sulphide.
Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions.
- When silver nitrate solution is added to a solution of A, a white precipitate, insoluble in dilute nitric acid, is formed.
- The addition of dilute hydrochloric acid to B produces a gas which turns lead acetate black on paper.
- When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test tube, a brown ring is formed.
- When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green.
- The addition of dilute hydrochloric acid to E produces effervescence. The gas produced turns lime water milky but does not affect acidified potassium dichromate solution.
Many salts absorb water from the atmosphere. This property is called:
