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प्रश्न
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
उत्तर
| Flame test for calcium chloride | Acid used for flame test | Acid used is conc. HCl [Hydrochloric acid] |
APPEARS IN
संबंधित प्रश्न
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
Explain the following reaction with one suitable example of Displacement reaction.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
State the conditions necessary for a chemical change or reaction.
Give an example of the following chemical change.
Two gases combine to form white solid
Give an example of the following chemical change.
Two solids combine to form a liquid
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
Complete and balance the following reaction:
Pb(NO3)2 + KI →
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
What do you observe when H2S is passed through a lead nitrate solution.
Give a chemical test to distinguish between the following gases.
NH3 and SO2
Distinguish by heating the following in dry test tubs.
Zinc nitrate and copper nitrate.
Distinguish by heating the following in dry test tubs.
Ammonium Chloride and iodine.
Give reason for the following:
A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
Complete the statement by filling in the blank with the correct word:
The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.
Circle the odd one out. Give reason for your choice
Match the following:
| 1. | Sodium Chloride | a. | CaSO41/2H2O |
| 2. | Calcium sulphate dihydrate | b. | C2H5Oh |
| 3. | Magnesium sulphate hydrate | c. | CaSO4.2H2O |
| 4. | Calcium sulphate hemihydrate | d. | NaCl |
| 5. | Phenol | e. | MgSO4.H2O |
Beating an egg to make a cake is a ______.
Write five changes in the characteristics of a substance that can take place during a chemical change.
