Advertisements
Advertisements
प्रश्न
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
Advertisements
उत्तर
| Copper sulphate | Copper carbonate | |
| Residue left | Anhydrous(CuSO4) | Copper oxide(CuO) |
| Colour of residue | The colour of the residue is Dirty white. | The colour is black solid. |
| Gas produced | Water vapour (H2O) is produced. | Carbon dioxide(Co2) is produced. |
APPEARS IN
संबंधित प्रश्न
State four conditions necessary for chemical reactions to take place.
Write true or false .
A black residue is formed when sugar is heated .
Match the pairs.
| a. | Photosynthesis | i. | Tendency to lose electrons |
| b. | Water | ii. | Reactant in combustion process |
| c. | Sodium chloride | iii. | Chemical change |
| d. | Dissolution of salt in water | iv. | Covalent bond |
| e. | Carbon | v. | Ionic bond |
| f. | Fluorine | vi. | Physical change |
| g. | Magnesium | vii. | Tendency to form anion |
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
Name: A brown gas
State the following reaction represent oxidation or reduction.
\[\ce{Ag->Ag+}\]
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 __________.
The water we drink is a combination of hydrogen and oxygen.
Galvanization is a process in which ______ is coated as a layer of iron.
Collect information about the types of fuels used for cooking in your area. Discuss with your teachers/parents/others which fuels are less polluting and why.
