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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)
The white particles of baking soda disappear when put in lemon juice. This means that it is a ______ change.
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उत्तर
The white particles of baking soda disappear when put in lemon juice. This means that it is a chemical change.
संबंधित प्रश्न
Complete and balance the following chemical equations:
N2 + O2 →
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
Give an example of a photochemical reaction.
Give one example electrochemical reaction.
Explain the term chemical reaction with special reference to reactants and products.
Complete the statement by filling in the blank with the correct word:
The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
Both CO2 and H2 gases are ______.
