Poliquiz- msq 100 test for examPoliquiz- msq 100 test for exam PDF

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Poliquiz- msq 100 test for exam Poliquiz- msq 100 test for exam Poliquiz- msq 100 test for exam Poliquiz- msq 100 test for exam...

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Chemistry quiz 1. What are the coefficients of the REAGENTS in the following reaction: Hydrogen gas + Nitrogen gas -> Ammonia to) 3, 1 b) 1, 3 c)

3 H2 + 1 N2 ------> 2

2, 4

NH3

zarib movazene shode vakonesh dahande ha chande ?

d) 4, 2 is) 1, 3, 4

2. What kind of transformation is water freezing? to) isoenthalpic H2O(l) ------ > H2O(S) + Q

b) isentropic c)

exothermic

Tasavor konid ab bekhad yakh bezne ? Garma migirin azash dg ? Pas Vakonesh mishe Garma Za ya

d) None of the above 3. Which substance contains a Methyl group: to) Cyclohexane

a = Cyclo = Pishvand Molkol Hayi ke Halqe Sirshode TashKil midan = formol koli = C

b) Trinitrobenzene c)

CH3 = Methyl Group

b = Trin = 3 ta ,,,,, Nitro = Nitrogen ,,,,,,, Benzen Mishe C6H6 Sirnashode = C6H3N3O6

Acetylene

c = Acetylene = Ethyne = AZ groh alkynes ya hamona ke pair 3 tayi Darn= C2H2 .

d) Methanoic acid d = Methanoic Acid = formic acid = sadeh tarin acid = CH2O2 ==== Gol nakhorin Gro asli Molkol bashe .

is) Toluene 4. A solution is acidic though

E = C7H8 = Toluene == Ye molkol Benzene ba Ye Groh METHyl

to) [H3O +]> 10 ^ -7 b) [OH-] pOH

d) Kw Qelzat OH- VA H3O barabare yani harkodom 10be tavan -7 hala bara Acidi bodan mahlol bayad in Balanc az beyn Bere pas meqdar Acid = H+ = H3O bayad az on taraf Qelzat OH- Kamtar az 10 be tavan 7 bayad bashe . Gozine B

is) [OH-]> 10 ^ -7 5. An equilibrium reaction has Kp = [C] ^ 2 [D] / [A] ^ 2 [B], the reaction in que tion is: to) 2C + D 2A + B b) 2A + B 2C + D c) A + B C + D d) C + D A + B

tavan neshon dahande

dar vakoneshe .....

donbal gozineyi ke n yek hast bashid .. nesh dahane to makh ahande hastan va samt c

e va baqieh Zaribesho e dare Inke Mavad vako an Pas A va B Vakonesh d vakonesh Qarar migiran

6. How many product molecules are generated by the combustion of 2 methane molecules with oxygen? to) 2 b) 4 c)

6

7. What is the basic formula of 2-propanol (or propan-2-ol)? to)

C. 3 H. 7 OR

9. One substance is reducing compared to another if: to) It has less tendency to pass into ionic form b) None of the other answers c)

It has a greater tendency to lose electrons

d) It has a greater tendency to buy electrons is) It shrinks more easily 10. Dissolve NH3 in water. What is the ionic dissociation constant of ammonia? to) 1.8 * 10 ^ 5 b) -1.8 * 10 ^ 5 c)

1.8 * 10 ^ -5

d) -1.8 * 10 ^ -5 is) None of the above 11. The reduction in the voltaic cell occurs: to) to the negative electrode b) in the salt bridge c)

to the static electrode

d) to the positive electrode is) there is not enough data to know 12. A reaction is endothermic if to) DH> 0 b) DH 2H2 + O2 b) H20-> 2H + + Oc)

2H2O -> H3O + + OH-

61. A voltaic cell transforms to) Chemical energy into electricity b) Electricity into thermal energy c)

Thermal energy into electrical energy

62. Given 500mL of nitrogen at a pressure of 0.75atm, what will the volume be at a pressure of 1.50atm, assuming tha to) 125 mL b) 1000 mL c)

2000 mL

d) 250 mL is) 500 mL 63. How is the substance with the symbol CO indicated by the IUPAC nomenclature? to) Carbon oxide b) carbon monoxide c)

carbonaceous oxide

d) carbon dioxide is) carbon dioxide 64. The name of the following compound: HIO4 to) Periodic acid b) Iodic acid c)

Iodic acid

d) Hypoiodic acid is) Ionic anhydride 65. Indicate the correct sequence for the boiling temperature at the pressure of 1 atmosphere for the series of compoun to) HI...