Advertisements
Advertisements
प्रश्न
Mention the colour changes observed when the following indicators are added:
| Solution | Acids | Alkalies |
| (a) Alkaline phenolphthalein solution | ||
| (b) Methyl orange solution | ||
| (c) Neutral litmus solution |
Advertisements
उत्तर
| Solution | Acids | Alkalies |
| (a) Alkaline phenolphthalein solution | Remains Colourless | Colourless to pink |
| (b) Methyl orange solution | Orange to pink | Orange to yellow |
| (c) Neutral litmus solution | Blue to Red | Red to Blue |
APPEARS IN
संबंधित प्रश्न
Write a balanced chemical equation for the preparation of the following salts
Copper carbonate
How is the following salt prepared:
Magnesium carbonate from magnesium chloride.
Explain why It is necessary to find out the ration of reactants required in the preparation of sodium sulphate.
Give equation to prepare the following as directed
PbCO3 from Pb(NO3)
Write the balanced equation for the preparation of the following compounds, starting from iron and using other substance: Iron (II) chloride
Choosing the correct words given in brackets, complete the sentence given below: Copper sulphate from copper.
The diagram given below is to prepare iron (III) chloride in the laboratory.
(i) What is substance B?
(ii) What is the purpose of B?
(iii)Why is iron (III) chloride to be stored in a closed container?
(iv) Write the equation for the reaction between iron and chloride ?
Match the salts given in Column I with their method of preparation given in Column II:
| Column I | Column II | ||
| (i) | Pb(NO3)2 from PbO | (a) | Simple displacement |
| (ii) | MgCl2 from Mg | (b) | Titration |
| (iii) | FeCl3 from Fe | (c) | Neutralization |
| (iv) | NaNO3 from NaOH | (d) | Precipitation |
| (v) | ZnCO3 from ZnSO4 | (e) | Combination |
Give the equation for the preparation of the following salt from the starting material given.
Copper sulphate from copper (II) oxide
You are provided with the following chemicals:
NaOH, Na2CO3, H2O, Zn(OH)2, CO2, HCI, Fe, H2SO4, CI2, Zn.
Using the suitable chemicals from the given list only, state briefly how you would prepare iron (II) sulphate.
