Advertisements
Advertisements
प्रश्न
A salt whose aqueous solution will have a pH of more than 7 will be ______.
पर्याय
K2CO3
K2SO4
NaCl
NH4Cl
Advertisements
उत्तर
A salt whose aqueous solution will have a pH of more than 7 will be K2CO3.
Explanation:
A pH of more than 7 indicates that the aqueous solution is basic or alkaline. Potassium carbonate (K2CO3) is a basic salt formed from a strong base (KOH) and a weak acid (H2CO3). When dissolved in water, carbonate ions undergo anionic hydrolysis, releasing excess hydroxide ions (OH−), thereby raising the pH above 7.
APPEARS IN
संबंधित प्रश्न
The pH of a salt used to make tasty and crispy pakoras is 14. Identify the salt and write a chemical equation for its formation. List its two uses.
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.
Write a balanced equation for the preparation of the following salt:
Zinc carbonate from zinc sulphate.
What name is given to the common salt which is mined from underground deposits? How was this salt formed?
Rock salt is mined just like ______.
Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid.
What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.
What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved.
Name three products of the chlor-alkali process. State two uses of each of these products.
Write the names, formulae and colours of any two hydrated salts.
Which of the following salts will give an aqueous solution having pH of almost 7?
P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:
- blue litmus red?
- red litmus blue?
Name a salt whose solubility decreases with temperature.
The pH values of three solutions A, B and C are given in the table. Answer the following questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
- Which solution will have no effect on litmus solution?
- Which solution will liberate CO2 when reacted with sodium carbonate?
- Which solution will turn red litmus solution blue?
Answer the following questions below, relating your answers only to salts in the following list:
Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water.
(i) What is the name given to the water in the compound copper sulphate-5-water?
(ii) If copper sulphate-5-water is heated, the water is driven off leaving anhydrous copper sulphate. What is the colour of anhydrous copper sulphate?
(iii) By what means, other than heating, you can dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate?
(iv) Which one of the salts in the given list is deliquescent?
State what would you observe when :
The salt ferric chloride is exposed to the atmosphere.
A salt that is formed by the complete neutralization of an acid and a base is called ______ salt.
Salt is ______ in nature.
How is normal salt obtained? Give a suitable reaction.
