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Why does phenol readily undergo electrophilic substitution but benzene does not without the aid of a catalyst?

Benzene's delocalised π system of electrons makes it not quite electron rich enough for the reaction to take place. The lone pair from the -OH group in phenol adds enough electron density into the ring so th...
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In the years 1961-1963 the campaign to advance the rights of African Americans made only limited progress in the face of bitter opposition. Assess the validity of this view.

The first reason as to why the statement is not valid is because of the use of protest and student groups. This makes the statement less valid because, despite facing opposition, protest groups were influent...
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Answered by Libi S. • History tutor
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Express 3x+1/(x+1)(2x+1) in partial fractions

3x+1/(x+1)(2x+1)=A/(x+1) + B/(2x+1)Multiply equation by (x+1) and (2x+1) to get:3x+1= A(2x+1) + B(x+1)Let x=-1 (x+1=0 so x=-1) sub into new equation. -2= A(-1) + B (x+1)-2=-AA=2Let x=-1/2 and sub into same e...
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Answered by Niamh M. • Maths tutor
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What is a whip in a political party?

A whip is the term for an individual who is a member of a political party in parliament (an MP). The leadership of the party relies on the 'whip' to try to ensure that all the members of the party are voting...
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Explain the process of eutrophication.

Nitrates and phosphates are leached into a slow-moving water body (e.g. a lake). This results in an algal bloom on the surface of the water body. The algae block sunlight and prevent it from reaching aquatic...
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Answered by Vishal B. • Biology tutor
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