Hey guys !! I want some help.... Plz solve these questions as soon as possible and ans. These questions are from Class-6 ( Science ) Ch-6 NCERT. These questions are not in the book. These are extra questions. Plzz solve and help me....
Plz don't write irrelevant things. Answer only if you know the correct answer.
Thank you in advance
Attachments:
Answers
Answered by
1
Answer:
5) a)burning of paper is an irreversible change.
b) melting of an ice cream is reversible change.
c) making bread from dough the is an irreversible change.
d) mixing salt in water is reversible change.
e) frying of egg is an irreversible change.
Hope this answer is helpful to you.
plz mark my answer as brainliest. FOLLOW ME.
Answered by
1
- This is because while cooking food, the properties of the ingredients and substances gets altered which makes it impossible to recover the original substance back. Therefore, due to this reason it is regarded as a kind of irreversible change.
- When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an energy change as new products are generated.
- a)Expansion and contraction. Substances expand (increase in size) when they get warmer, and they contract (decrease in size) when they get cooler. b)Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
- Because metals expand on heating. so that metal expand making it easier to attach the handle
- a)irreversible changes b)reversible changes c)irreversible change d)reversible(as it canged during filtration) e)irreversible change
Similar questions