Advertisements
Advertisements
Question
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)
Electron ______ is complete in each hydrogen in a hydrogen molecule.
Solution
Electron duplet is complete in each hydrogen in a hydrogen molecule.
RELATED QUESTIONS
What are (i) positive catalysts and (ii) negative catalysts? Support your answer with one example for each of them.
FILL IN THE BLANK
The new substances formed during a chemical reaction are called the ..................
What are the characteristics of a chemical reaction ? A chemical reaction is characterised by an irreversible change in which a new substance is formed.
Name the type of chemical reaction shown by the following equation:
Fe + CuSO4 → FeSO4 + Cu
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)
A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.
Write the chemical reaction where the following changes are observed.
Precipitate is formed
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Give a word equation for the following reaction.
Two gases which combine to give a solid.
Write some materials prepared by chemical changes.
______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.