Uncertainty in burette reading!

In a practical paper the question of titration had a part asking 'maximum uncertainty in a single reading with a burette'. According to physics, the answer to this should be 0.10 cm³(Because we take uncertainty as least count of the measuring instrument), but the mark scheme gives 0.05 cm³ as the answer. Why is that so? - does the uncertainty concept different in chemistry than physics?

he resoloution of a burette for a single reading is +-0.05 cm^3 however when you take more then one reading you have to multiply it as you have obv taken more then one reading so in a titration you take 2 readings so the uncertianity would be 0.05x2 =+-0.1 cm^3

BUT we take least count of the instrument as the uncertainty. The least count of a burette is always 0.10cm³, isn't it? And I know that the error is multiplied by two whenever we subtract or add two same readings.

In chemistry we don't use the least count.

Each instrument has a considered error and the burette can be 'read' to within half of 0.1ml = 0.05. Hence we take the error to be +/- 0.05

So in chemistry do we take the uncertainty as half of the least count?

Like I said, it depends on the instrument, and even then there is little consensus.

A 2 dp electronic balance is sometimes taken as +/- 0.01 and sometimes as +/- 0.005.

The main thing is to understand the concept and to evaluate the importance of each inaccuracy on the final value.