The solution A and B are 0.1 and 0.2 molar in a substance. If 100ml of ‘A’ are mixed with 25ml of ‘B’ and there is no change in volume , then the final molarity of solution is a) 0.15 M
b) 0.18M
c) 0.12 M
d) 0.30M

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

your answer would be “dry”