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प्रश्न
A chemical equation is a statement that describes a chemical change in terms of
पर्याय
symbols and formulae
energy
number of atoms
colours
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उत्तर
symbols and formulae.
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संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron pipes coated with zinc do not get rusted easily.
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
Complete and balance the following chemical equations
Na + H2 O →
Explain the type of reactions on the basis of the direction of reaction.
Differentiate between in Chemical reaction and chemical equation.
Copper carbonate when heated, it turns :
Explain the following reaction with one suitable example of Combination reactions .
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)
Rusting of iron is a ______ chemical change.
Define a photochemical reaction.
State the main characteristics of chemical reactions. Give at least one example in each case.
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
________ is a chemical substance which alters the speed of a chemical reaction.
Analogy:
H2O: Water:: NaCl: ______.
What is the use of indicator?
Melting of wax is a change where a solid changes to liquid state. Give one more such change which you observe in your surroundings
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.
What changes do you expect?
Heat may evolve or be absorbed during a ______ change.
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
Is the conversion of milk into ice cream a chemical change?
