PREBOARDS MOD 1 Flashcards
What is the normality of sulphuric acid containing 73.5g/500ml of solution (MW=98g/mol)
A. 2.0N
B. 2.5N
C. 3.0N
D. 1.0N
C. 3.0N
Substances that shows strong conductivity property and a high degree of ionization:
A.HCl,NaOH,NaCl
B.Glucose,ethanol
C.Ammonia,HF
D.Buffer
E.Two of the above
A.HCl,NaOH,NaCl
Radioisotopes decay:
A.At the same rate
B.Randomly
C.Rapidly
D.Slowly
E.Only when catalyzed
B.Randomly
4.Which of the ff. is a polyatomic molecule and a compound?
A.O2
B.CO2
C.CO
D.CO3-2
B.CO2
Type of element nomenclature that gives the charge of the complex ion rather than the oxidation state of the central unit:
A.Stock nomenclature-
B.Classical nomenclature
C.Ewens-Bassett System
D.NOTA
C.Ewens-Bassett System
Gas law w/c states that at the same temperature and pressure, the rates of diffusion or effusion of gases are inversely proportional to the square root of their masses.
A.Amonton’s Law-Gay Lussac’s(P,T),P1/T1=P2/T2
B.Mariotte’s Law-Boyle’s(P 1/V)inverselyproportional),P1V1=P2V2
C.Graham’s Law
D.Charle’s Law-T,V,T1/V1=T2/V2
C.Graham’s Law
Standard temperature or gas
A.00C
B.0K
C.273.15K
D.A&C
D.A&C
This states that every orbital in a sublevel is singly occupied before any orbital is doubly occupied and that all
electrons in singly occupied orbitals have the same spin.
A.Aufbau principle-electron filling:lower to higher energy levels
B.Hund’s rule
C.Pauli’s Exclusion Principle-no two electorns can have the same quantum no.orbital:max. 2 electron having opposing spins.
D.Heisenberg Principle-Impossible to determine position and velocity of particle.
B.Hund’s rule
*9.Reduce occurs in:
A.Cathode-negative electrode
B.Anode
C.Both A&B
D.None
A.Cathode
What is the term used for a molecule, like water, that when mixed w/ the acids behaves as a base and vice
versa?
A.Electrolyte-conducts electricity when dissolved in water
B.Ampholyte
C.Ion
D.Compound
B.Ampholyte
Which of the ff. is true about catalysts?
A.They speed up the rate of rxn by lowering activation energy-inversely proportional to the rxn rate
B.They are used up in the rxn–not
C.They affect the chemical equilibrium—kinetics
D.Two of the above
A.They speed up the rate of rxn by lowering activation energy-inversely proportional to the rxn rate
This states that if a stress is placed on a system that is at equilibrium, the system will shift in such a way to
relieve the stress.
A.Le Chatelier’s principle
B.Raoult’s Law-VP lowering,water boil if VP=atm,water bubbles/vaporizes if VP> atm,+ salt reduces the solvent
escape since VP< atm(VP lowering)
C.Law of Definite Proportions-(Proust)fixed ratio of elements in cmpd.(expression:whole no.)
D. Law of Multiple Proportions-(Dalton)variable ratios of elements in cmpd.(expression:mass)–MW
A.Le Chatelier’s principle
Lewis acid—electronic concept of A/B
A.Proton donor
B.Electron donor-BASE
C.Proton acceptor
D.Electron acceptor
D.Electron acceptor
The temperature change experienced by an object when it absorbs a certain amount of energy is determined by:
A.Specific heat-heat capacity of 1g subs.
B.Heat of fusion/Melting/Liquefaction/Thawing-quantity of heat needed to change 1 g of solid to liquid
C.Heat of capacity-amount of heat requirement to raise T of a given quantity of subs. By 10C(or K)
D.Molar heat capacity-Heat capacity of 1 mole subs.
C.Heat of capacity
An atom’s number of valence electrons also reflect its:
A.Period-energy level(n=1 to 7)
B.Group/Family
C.Mass number=p+ + n0
–nucleon
D.Atomic number= p+—element
B.Group/Family
Among the acids of the halogens, which is considered to be the most acidic?—HX(Hydrohalic acids),ionic
property of bound strength/energy,inversely acidity
A.HBr
B.HI
C.HF-high ionic property and strongest bond,weakest acid
D.HCl
B.HI
