Advertisements
Advertisements
Question
Write true or false :
When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .
Options
True
False
Advertisements
Solution
False
APPEARS IN
RELATED QUESTIONS
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A), then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
How do the following help in bringing about a chemical change?
pressure.
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
Explain the type of reactions on the basis of the direction of reaction.
State the conditions necessary for a chemical change or reaction.
Give an example of a reaction where the following are involved
Heat
Write the chemical reaction where the following changes are observed.
Colour change is noticed
Give a chemical test to distinguish between the following gases.
HCl and H2S
Distinguish by heating the following in dry test tubs.
Zinc nitrate and copper nitrate.
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium dichromate.
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
Write some materials prepared by chemical changes.
State whether the following statement is true or false:
When a candle burns, both physical and chemical changes take place.
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
______ is a chemical substance is used in whitewashing.
