Any substance which produces ions in solution is an electrolyte. All the acids, bases and salts wnduce ions in solution and they also conduct electricity. of  Why are acids and bases either strong or weak aOH Acids and bases either strong or weak: The strength of an acid or a base depends on the degree of their dissociation into ions when

issolved in water. A strong acid or a strong base will give more H or OH ions respectively in an Kqueous solution. While a weak acid or a weak base will give less H or OH ions respectively in iqueous solution. 04. Why are some salts acidic or basic. Some salts acidic or basic:

Normal salts do not have ionizable hydrogen or hydroxide ions. Why is water called amphoteric Water called amphoteric: water is called amphoteric because it acts both as an acid and a base. Water undergoes self-ionization

5Ye Small quantities ofhydrogen ions (H+) and hydroxide ions heating is called volume expansio Sio volume:of a substar nce Either solid Increase in volume of substance on hets obsenve Experimentally that inC Ruids) is directly proportional to the initial volume Consider a body of volume V at an initial temper. Matheme of volume re "T2" (i.e. T2> T1). Let 'AV find volume is "V" at temperature "T2" and AT increase in temperature. tenDy EXperimentai.aV is thaatin Volume Expansion (or Cubi.

rature and increase in tempera

erature 'Ti'. After eating the all ​in volun en-by Experimentaly'observation Combining equation 1 and 2 A' is the constant of proportionality. t is known it is depends upon the material of the substance Coefficient of volume expansion is define asIncrease in volume per.unit volume per Formula: degree raise in temperature Expression for final volume: Using equation: Discuss the relation between of volume expansion. en co-efficient of linear expansion efficie Prove that Proof: Consider a rectangula b0x of initial length (t) height initial length (t) height (h) and width (w) at ten DOx it expands and its final length become  height (h) and ​The volume (v) of the box wi be After heating the box it expands aanw) at temperature (T2), as show Then final volume of the bo