Question

State whether True or False (T/F).
1. Chemical reactions do not tell us about reactants or products.
2. Chemical reactions do not involve change in the chemical composition of the substances involved.
3. Endothermic reactions are detected by fall in temperature.
4. The state of the substances taking part in a chemical reaction never changes.​

Answer 1

Answer:

1.)False

2.)False

3.)False

4.)False

Answer 2

$1) \: True \\ \\ 2) \: False \: \color{lime}( \color{lime} \: correct \: answer \: is \: physical \: changes \: do \: not \: involve \: in \: the \: chemical \: \color{lime} \\ \color{lime}properties \color{lime} \: of \: the \: substance \: involved). \\ \\ 3) \: True \\ \\ 4) \: False \color{aqua} \: (The \: state \: of \: the \: substance \: takin \: part \: in \: a \: chemical \: reaction \: does \\ \color{aqua}changes \: a \: chemical \: reaction \: rearranges \: the \\ \color{aqua}constituent \: atoms \: of \: the \: reactants \: to \: create \: different \: substances \: \\ \color{aqua} as \: products).$