Advertisements
Advertisements
प्रश्न
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
The spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.
Advertisements
उत्तर
The spoiling of food is a chemical change which is recognized from the generation of certain smell due to it.
संबंधित प्रश्न
Give one example that illustrates the following characteristics of a chemical reaction:
Change in state
Multiple choice:
Which of the following is not a characteristic of a chemical change?
Complete the following table and write your observations.
|
Hydrogen sulphide |
Ammonia |
Sulphur dioxide |
Hydrogen chloride |
|
|
Shake the gas with red litmus solution |
||||
|
Shake the gas with blue litmus solution |
||||
|
Apply a burning splint to a gas |
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
What do you observe when HCI is passed through a silver nitrate solution.
Distinguish by heating the following in dry test tubs.
Ammonium Chloride and iodine.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.
A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?
______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.
