Uestion 1(multiple choice worth 5 points) (08.01 mc) which of the following describes a characteristic of water that makes it cohesive in nature? it has a partial negative charge on hydrogen and a partial positive charge on oxygen. it has a linear molecular structure with h-o-h arranged in a straight line. it has a vast electronegativity difference between its constituent atoms. it requires a high amount of heat to raise or drop its temperature.

It has a vast electronegativity difference between its constituent atoms.  

Explanation:

This makes the O-H bond so polar that it can form strong hydrogen bonds (cohesive forces) with its neighbours.

A is wrong. The charge on H is δ⁺ and the charge on O is δ⁻.

B is wrong. A water molecule has a bent shape.  If it were linear, water would be nonpolar.

D is wrong. It is a statement of a physical property of water. It does not explain the cohesive forces in water.

C - It has a vast electronegativity difference between its constituent atoms.

Explanation:

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

i do not get it   at all