Question

Fill in the blanks :
(a) A reaction in which two or more
substances combine to form a single
substance is called a ................... reaction.
(b)A ................... is a substance which
changes the rate of a chemical reaction
without undergoing a chemical change.
(c) The formation of gas bubbles in a
liquid during a reaction is called ....
(d) The reaction between an acid and a base
is called
(e) When an atom loses electron ....
takes place.
(f)The chemical change involving iron and
hydrochloric acid illustrates a .......
reaction.
(g) In the type of reaction called ......
two compounds exchange their positive
and negative radicals respectively.
(h) A catalyst either .............. or
the rate of a chemical change but itself
remains ............. at the end of the reaction.
..........​

Answer 1

Answer:

1. Combination reaction
2. Catalysts
3. Precipitate
4. Neutralisation reaction
5. Positive ion
6. Displacement reaction
7. Double displacement reaction
8. accelerate or decelerate, unchanged