Advertisements
Advertisements
प्रश्न
A solution reacts with marble chips to produce a gas which turns lime water milky. The solution contains:
(a) Na2SO4
(b) CaSO4
(c) H2SO4
(d) K2SO4
उत्तर
H2SO4
Marble chips contain calcium carbonate (CaCO3), which reacts with sulphuric acid (H2SO4) to form carbon dioxide gas (CO2). Carbon dioxide gas, when passed through lime water [Ca(OH)2], turns it milky.
APPEARS IN
संबंधित प्रश्न
When phenolphthalein is added to NaOH, the colour of the solution will become _________.
- colourless
- red
- pink
- yellow
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.
Why should curd and sour substances not be kept in brass and copper vessels?
How is the concentration of hydronium ions (H3O+) affected when a solution of an acid is diluted?
How is the concentration of hydroxide ions (OH−) affected when excess base is dissolved in a solution of sodium hydroxide?
State the common and chemical names of the compound formed when plaster of Paris is mixed with water.
Phenolphthalein is a synthetic type of indicator.
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
- The temperature of the solution increases
- The temperature of the solution decreases
- The temperature of the solution remains the same
- Salt formation takes place
Write notes on the properties of acids.
For each of the salt: A, B, C and D, suggest a suitable method of its preparation.
C is a soluble salt of copper.
