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प्रश्न
Define a chemical reaction.
उत्तर
Any chemical change in matter which involves transformation into one or more substances with entirely different properties is called a chemical reaction.
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संबंधित प्रश्न
One of the following is an endothermic reaction. This is:
(a) combination of carbon and oxygen to form carbon monoxide
(b) combination of nitrogen and oxygen to form nitrogen monoxide
(c) combination of glucose and oxygen to form carbon dioxide and water
(d) combination of zinc and hydrochloric acid to form zinc chloride and hydrogen
Give one example of a combination reaction which is also exothermic.
What do you understand by a chemical bond ?
Fill in the blank
The chemical reaction between hydrogen and chlorine is a ................ reaction
Explain the following type of chemical reaction, giving two examples for it:
Combination reaction
What are chemical combination or synthesis reactions ? Chemical combination or synthesis:
A student prepared an aqueous solution of CuSO4 in beaker X and an aqueous solution of FeSO4 in beaker Y. He then dropped some iron pieces in beaker X and some zinc pieces in beaker Y. After about 10 hours he observed that the solutions in X and Y respectively appear:
(A) blue and green
(B) colourless and pale green
(C) colourless and light blue
(D) greenish and colourless
Define: Chemical combination reaction
Complete the statement by filling in the blank with the correct word:
Direct combination reaction of phosphorus pentoxide with water gives _______.
Identify the types of chemical reactions occurring during the combustion of fuel:
