A small steel needle is carefully floated on water in a beaker. When a few drops of kerosine are introduced into the water the needle sink. Which of the following statements correctly explain(s) the observation? i. there is tension on the water surface ii. kerosine reduces the density of water so that needle becomes denser than water iii. kerosine reduces the surface tension of water

Emmathedrawer

6 years ago

at first...water has surface tension thats it's ability to act as a membrane...the introduction of kerosene...or soap...will reduce its surface tension thereby causing the pin to sink...the answer is E

OhieinLTD

1 year ago

It is not correct

Fabian3

2 months ago

is correct 💯 it stated additionbof impurity

OluomaSarah

7 years ago

Please.. How can there be surface tension and reduction of surface tension at the same time?.. The answer should be A

Note that, oil with lower surface tension than water reduces surface tension.. And research shows that Kerosene has a higher surface tension than water.. So, addition of kerosene will increase the surface tension