What is wrong with the name 1-t-butyl-2-methylpropane?

Explanations:- While naming a carbonic compound then first of all we select the longest carbon chain. If we draw the structure for the given name then parent carbon chain(propane) has three carbons. There is a methyl at second carbon and tertiary butyl group at first carbon. This tertiary butyl group changes the parent carbon. In actual, the parent chain would have five carbons and we have three methyl groups in total, two methyl groups at second carbon and one methyl group at fourth carbon.

So, the correct name will be 2,2,4-trimethylpentane.

The image is shown below.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.