Advertisements
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
A solution of a substance ‘X’ is used for white washing.
- Name the substance ‘X’ and write its formula.
- Write the reaction of the substance ‘X’ named in (i) above with water.
When crystals of copper sulphate are strongly heated, the residue obtained is ___________.
(A) red in colour
(B) blue in colour
(C) green in colour
(D) colourless
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
What type of chemical reaction take place when ammonia and hydrogen chloride are mixed?
Give one example of a combination reaction which is also endothermic.
What effect does an increase in concentration of H+ (aq.) in a solution have on the pH of solution?
State why a direct combination reaction is called a – ‘synthesis 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:
Balance the following chemical equation and identify the type of chemical reaction.
`"Na"("s") + "S"("s") overset("(Fuse)")(->) "Na"_2"S"("s")`
