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
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer
Which of the following is a reducing agent?
- oxygen
- chlorine
- hydrogen
- none of these
What are homogenous reactions ?
Write true or false :
No new substance is formed during a chemical reaction.
What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.
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)
Chlorine (Cl2) molecule is formed by ______ of electrons between two chlorine atoms.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
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.
Name: A brown gas
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to calcium carbonate.
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Calcium hydroxide.
Mention the various conditions required for a chemical reaction to occur.
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
Silver metal can displace hydrogen gas from nitric acid.
Which of the following statement is incorrect for a chemical reaction?
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Are these changes chemical in nature?
Vanaspati is obtained from vegetable oils by the addition of ______ to the oils.
What are the chemical reactions that occur in everyday life?
