Plzz can any one help me to solve question no.15

Dear Student, 

Assuming that your question is "Which of the following are correctly matched.........between them?"

Correctly matched pair is
option a) Joining entity : 2 ice cubes pressed together , Bond : Hydrogen bond and

Explanation: When two ice cubes are pressed together, there occurs friction and heat is generated. This heat melts the outer layers and on melting, friction decreases. Because of prevailing low temperature, molten ice refreezes and the two cubes form a single piece.
As the bonds that hold water molecules together in ice are hydrogen bonds. Hence it is a correct answer.

Other options are incorrectly matched because,
Option b) is incorrect because hydration of cation or anion are because of ion-dipole interaction and not dipole dipole interaction
Option c) is incorrect because H2 gas molecules cannot form hydrogen bonds as it requires hydrogen along with Nitrogen, oxygen or fluorine.
Option d) is incorrect because HCl gas molecules are bound by dipole dipole interaction as H-Cl is a polar molecule and has dipole.

Regards

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which is your question no 15
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