Advertisements
Advertisements
प्रश्न
Why the alkali is added drop by drop to the salt solution?
Advertisements
उत्तर
If an alkali is added too quickly, then it is easy to miss a precipitate which redissolves in excess alkali.
APPEARS IN
संबंधित प्रश्न
Choose the most appropriate answer from the following list of oxides which fit the description.
[SO2, SiO2, Al2O3, MgO, CO, Na2O]
A basic oxide.
Name
a metallic hydroxide soluble in excess of NH4OH.
Name a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
Name the metal hydroxides which are :
(a) Insoluble (b) Soluble in
(i) Caustic soda solution (ii) Ammonium hydroxide solution.
What do you observe when caustic soda solution is added to the following solution: first a little and then in excess : FeCl3
What do you understand by amphoteric oxide? Give the balanced equations for the reaction with three different amphoteric oxides with a caustic alkali. Write your observation if any.
Name: A strong alkali
Write the equation for the following reaction :
Zinc oxide is treated with sodium hydroxide solution.
One chemical test that would enable you to distinguish between the following pair of chemicals. Describe what happens with each chemical or state 'no visible reaction'.
Calcium nitrate solution and zinc nitrate solution.
Write balanced equations for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
