2012-06-24

Chemistry reaction Kinetics

Chemistry Reaction Kinetics :


1- According to HESSES law,therml effects of a reaction depends upon?

a-initial concentration of reactants
b-initial and final concentrations of reacting substances
c-final conditions of the reacting substances
d-catalyst

2-when ammonium chloride is dissolved in water,the solution becomes cold.the change is?
a-endothermic
b-exothermic

c-super cooling
d-chemical

3-how much heat is liberated when 100ml of 0.1M NaOH are completely neutralized by 100ml of 0.1 MHCl?
a--57kj
c- -5.7kj
d- -6.05kj

4-BORN HEBER cycle is called
a-complete enthalphy cycle
b-complete energy cycle
c-complete internal energy cycle
d-complete heat cycle

5-the atom X nd Y have the electronic configuration shown below
X. 1s2  2s2  2p6 3s2 3p6 3d10 4s2
Y.1s2 2s2 2p4
which of  the following components are they likely to form
a-XY
b-XY2
c-X2Y
d-XY4

6-which of the following moleculeshas zero dipole moment
a-NH3
B- CHCL3
C-H2O

D-BF3
7-ehich of the hydrogen halides has the highest percentage of ionic character
a-HCl
b-HBr
c-HF
d-HI

8-which of the following species has unpaires electrons in antibonding molecular orbital
a-O2-2
b- N2-2
c-B2
d- F2
9-the molecule with largest dipole moment
a-BCl3
b- CO2
c-CO
d-CH4

10-during formation of ionic bond between sodium and chlorine
A- Na attains yhe configuration of Ne
B- Na attains the configuration of Ar
C-Cl attains the configuration of Ne
D- Cl attains the configuration of Na

11-the degree of polarity of molecule is called
A-bond energy
B-dipole moment
C-ionic character
D-coordinate character

12-VESPER theory explains
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3 comments:

  1. AN KY ANSWERS KAHAN SY MILIEN GY

    ReplyDelete
  2. how to solve the num of chapter 1 of chem

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