Advertisements
Advertisements
प्रश्न
When _______________ is passed through fresh lime water, it turns milky.
विकल्प
H2
CO2
CO
SO2
उत्तर
When CO2 is passed through fresh lime water, it turns milky.
APPEARS IN
संबंधित प्रश्न
What do we observe on pouring acetic acid on red and blue litmus papers?
(A) Red litmus remains red and blue litmus turns red.
(B) Red litmus turns blue and blue litmus remains blue.
(C) Red litmus turns blue and blue litmus turns red.
(D) Red litmus becomes colourless and blue litmus remains blue.
When acids react with metal, which gas is liberated?
What ions are present in the solutions of following substances? (write the symbols only)
Sodium hydroxide
A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings. What does this information tell you about the chemical nature of:
wasp stings?
What happens when a solution of sodium hydrogencarbonate is heated? Write equation of the reaction involved.
Read the following statements:
I. When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.
II. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic.
III. When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
IV. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
Which of the above statements are correct:
(A) I, and II
(B) II and III
(C) III and IV
(D) I and IV
Explain the following:
Lead carbonate does not react with dilute HCl.
Egg shell is made up of ____________.
During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to ______
Which of the following salts does not contain any water of crystallisation?
Which of the following gives the correct increasing order of acidic strength?
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
Which of the following are present in a dilute aqueous solution of hydrochloric acid?
Acids present in fruits and vegetables are called ______ acids.
A salt may be ______.
Can we taste acids and bases to identify them?
What property do acids and bases have in common? Explain it with an example.
The metal that will not produce hydrogen gas when reacted with dilute acids.
Give a balanced equation for the reaction:
Silver nitrate solution and sodium chloride solution.
