Advertisements
Advertisements
प्रश्न
The salt whose aqueous solution will turn blue litmus to red is:
(a) ammonium sulphate
(b) sodium acetate
(c) sodium chloride
(d) potassium carbonate
उत्तर
ammonium sulphate
Ammonium sulphate [(NH4)2SO4] is formed from a weak base, ammonium hydroxide (NH4OH), and a strong acid, sulphuric acid (H2SO4). On dissolving in water, (NH4)2SO4 hydrolyses to form more H+ ions than OH- ions. As the aqueous solution of the salt (NH4)2SO4 is acidic, it turns blue litmus red.
APPEARS IN
संबंधित प्रश्न
Indicator is a substance which shows different colours in acidic and basic solutions.
Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only turmeric indicator.
The pH of soil A is 7.5 while that of soil B is 4.5. Which of the two soils, A or B, should be treated with powdered chalk to adjust its pH and why?
How does a universal indicator work?
Explain how pH change in the lake water can endanger the lives of aquatic animals (like fish). What can be done to lessen the danger to the lives of aquatic animals in the lake?
What colour would the universal indicator show in an aqueous solution of sugar? Why?
Someone put some universal indicator paper onto wet soap. The pH is 8. What does this tell you about the soap?
How could the person change his eating habits to lessen chances of suffering from tooth decay?
Name any two synthetic acid-base indicators.
How will you prepare a china rose indicator?
