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प्रश्न
What do you understand by a chemical bond ?
उत्तर
A chemical bond is the attractive force that holds the atoms of a molecule together, in a compound.
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संबंधित प्रश्न
What type of reaction is represented by the following equation?
2 Ca + O2 → 2CaO
What type of chemical reaction is represented by the following equation?
A + B → C
Define a combination reaction.
Give one example of a combination reaction which is also exothermic.
(a) What is double displacement reaction? Explain with an example.
(b) A small amount of quick lime is added to water in a beaker.
(i) Name and define the type of reaction that has taken place.
(ii) Write balanced chemical equation for the above reaction and the chemical name of the product formed.
(iii) List two main observations of this reaction.
Calcium oxide reacts vigorously with water to produce slaked lime.
\[\ce{CaO{(s)} + H2O(l) -> Ca(OH)2(aq)}\]
This reaction can be classified as:
(A) Combination reaction
(B) Exothermic reaction
(C) Endothermic reaction
(D) Oxidation reaction
The number of products formed in a synthesis reaction is ______
In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature?
A clear solution of slaked lime is made by dissolving Ca(OH)2 in an excess of water. This solution is left exposed to air. The solution slowly goes milky as a faint white precipitate forms. Explain why a faint white precipitate forms, support your response with the help of a chemical equation.
A metal ribbon 'X' bums in oxygen with a dazzling white flame forming a white ash 'Y'. The correct description of X, Y and the type of reaction is:
