Science, asked by kushal0224, 1 year ago

Can anyone solve and give 21 to 27 plss I will mark as brainliest plss

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kushal0224: Plss give me answer

Answers

Answered by anirudhmummadi
1

21)

1)CR2(so4)3

2)Pb(No3)2

B)

1)Al

2)neutrons=14 protons=13

3)EC-2,8,3

22)relative density is the density of a fluid in comparison to water

this is to reduce the pressure that is applied on the ground when the train passes over the tracks

23)the speed of sound varies with the change in medium

it increase when moved to a denser medium and vice versa

24)1)because it produces heat

2)it is irreversible

3)it forms a new compound(MgO)

25)it is because alum when dissolved in water forms a true solution,therefore it does not scatter light,hence the path of light is not seen.it also when salt or sugar is dissolved in water

27)Adjust the mirror of the microscope so that maximum light is available to illuminate the slide

take care to place the cheek cells in an isotonic solution

hope this helps you

plz mark it as brainliest


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