Question 1 which of these can be used to determine the purity of a crystal?
And melting point
Question 2 which of these statement is correct?
Ethanol molecule are bonded by hydrogen bond
Alcohol liquid turn vapour when the intermolecular hydrogen bond is broken.
Hydrogen bonding play an important role in cell ability of alcohol.
Question 3 an acid are the electron pair acceptor and based at the electron pair dunno this definition was proposed by who?
Answer is lewis 1934
Question 4 according to Arrhenius which of this statement is correct?
Answer is Acceptance which produce hydrogen ion in aqueous solution
Question 5 the intermolecular interaction which exist between nonpolar molecule is referred to as____?
Answer is dipole dipole interaction
Question 6 a pair of base and its conjugate acid or acid and its conjugate base is called?
Answer is conjugate acid base pair
Question 7 the relationship between melting point and molecular weight of organic compounds can be viewed as?
Answer is larger molecule weight compound is tend to have higher melting point
Question 8 the strength of an acid is measured by the ability to_____?
Answer is separate completely into hydrogen ion and hydroxyl ion
Question 9 the following an example of structural effect which affect the reactivity of molecule except?
Answer is tautomerism effect
Question 10 henderson hasselbalch equation relate which parameter?
Answer is divisions of ph as a measure of acidity using pka decoration is useful for estimating the ph of a buffer solution and finding the equilibrium ph in acid base reaction phd ka + log 10 ((A-)/(HA))
question 11 in determining the solubility of a substance the rule of thumbs means?
Answer is polar solvent desolved polar solute
question 12 why ethanoate ion called conjugate base of ethanoic acid?
Answer is because ethanoate can accept proton to become a ethanoic acid
Question 13 a proton is just one of the large number of species that may act as a lewis acid true or false?
Answer is false
Question 14 hydroxyl ion is a conjugate base of which of the following?
Answer is water
Question 15 when can a substance be considered soluble in a solvent?
Answer is when it molecule dissociate completely and the present of the ion of that solvent
Western 16 what is solubility of a substance?
answer is amount of substance volume of solvent
Question 17 which of these is a weak acid?
Question 18 which of this relationship will lead to dissolutions of solute?
answer is none of the above find the answer yourself
Question 19 the ability of any solvent to dissolve a solute is measured by its?
answer is dielectric constant
Question 20 which of these properties depend on the interionic or intermolecular force?
Answer is melting point, boiling point and solubility