Show by a simple experiment that a change involves interaction between two or more substances or bodies.
Answers
Explanation:
It is not always that change occurs upon interaction between 2 or more substances. Some reactions like decomposition reactions take place without interaction. Example :-When heat is supplied to CaCO3 it decomposes into CaO and Co2.
Besides most physical changes like cutting of paper and breaking of glass does not require interaction between 2 substances.
Other than this for any chemical change to take place we need 2 or more substances to interact. Chemical change is caused due to chemical reaction between 2 or more substances.
Chemical reaction refers to a dynamic behaviour of matter involving both a breaking and formation of chemical bonds, in which chemical compounds are transformed from reactants to products. Accordingly, chemical reaction changes the atom bonding system in molecules.
Formation of chemical bonds will always take place between 2 or more atoms(either same or different kind).
This does not need an example to prove that chemical bonding can take place alone with 1 atom because an atom must gain electrons from or lose electrons to or share elecrrons with another atom to attain stability and undergo chemical bonding. An atom always has the tendency to gain stability via bonding ,except those of noble gases.
So it is clear that a change involves interaction of 2 or more substances with the exception of few reactions , particularly decomposition reactions.
For the sake of answering the question, let's take the example of water (one of the most abundant compounds on Earth). It involves combination of 2 H atoms and 1 O atom. They are 2 different substances and product formed is H2O
Answer:
hey mate
Question :-
Rearranging of sentences!
→\textbf{Answer}Answer :-
(a) luck/it /to win /good /than /to /is /easier /it /retain.
= it is easier to retain good luck than to win.
(b) most /is /the /quality a /person /confidence /can have /attractive /self
= Self confidence is the most attractive quality a Person can have.
(c) what /life /challenges /interesting /makes /and /are /meaningful
= Challenges are what makes life interesting and meaningful.
Hope it helps!