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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)
Electron ______ is complete in each hydrogen in a hydrogen molecule.
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उत्तर
Electron duplet is complete in each hydrogen in a hydrogen molecule.
संबंधित प्रश्न
TRUE \ FALSE
A precipitation reaction takes place only in a solution.
Fill in the blank
A new substance is formed in a _______ change.
Multiple choice:
Thermal decomposition of sodium carbonate will produce
Name: Two carbonates do not produce carbon dioxide on heating.
Name: Two nitrates that do not produce nitrogen dioxide on heating.
Write your observation and a balanced equation in the case of the following substances being heated.
Zinc carbonate.
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
State the following reaction represent oxidation or reduction.
\[\ce{Cu++->Cu}\]
A chemical change may involve –
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?
