Question

what are bases?what are their physical property?

Answer 1

General properties of bases include: ... Reactions with indicators: bases turn red litmus paper blue, phenolphthalein pink, keep bromothymol blue in its natural colour of blue, and turn methyl orange yellow. The pH of a basic solution at standard conditions is greater than seven. Bases are bitter in taste.

Answer 2

Bases are cthe compound every molecule of which is made up of one or more hydroxyl ( OH ) group attached to the atom of a metal.
Properties of base :
1. Bases are soapy in touch
2. Bases taste unpleasant and bitter
3. Base turn red litmus to blue and phenolphthalein to bright pink
4. When dissolved in water bases provide OH - (negative hydroxyl) ions