MCQs OF 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
A- geometrical shape of molecules
B-sharing of electrons
C-ionic charater
D-paramagnetic nature of substance

13-which theory explains that pair of electrons around the central atom lie at maximum distance so they experience minimum repulsion
A- V.B theory
B- VESPER theory
C- MO theory
D- kinetic mooleculr theory

14- in sp2 hybridises orbital the s character is
A-11 PERCENT
B-22 PERCENT
C-33 PERCENT
D-44 PERCENT

15-which one has expected to have highest bond energy
A-CH4
B-HCl
C-HF
D-all
16- in a sigma bond formed between two hydrogen atoms, the electron cloud will be dense
a-on the sides of nuclei
b-below the bonded nuclei
c-in between to bonded nuclei
d-above the bonded nuclei
17-chemical bond formation takes place when
a-energy is absorbed
b-force of  attraction is equal to force of repulsion
c-force of repulsion overcomes the force of attraction
d-force of attraction overcomes force of repulsion

18-which change would have  negative DELTA H value
a- Nas------->Nag
b-Clg + e------->Cl-
c-Nag----------> Na+ +e
d-none

19- DELTA H and DELTA E are same when the system under study is
a-gas
b-solid
c-liquid
d- both solid and liquid
20- if you have two different polar diatomic molecules,their dipole moment will be
a-equal
b-different
c-zero
d-less than zero

21-which has two pi bonds
a-ethane
b-ethene
c-ethyne
d-ether

22-which of the following has the covalent bond
a-HCl
b-CaCl2
c-AlCl3
d-NaH

23-structure of ammonia molecule is
a- pyramidal
b-linear
c-angular
d-planar

24-chlorine atom gains the electrons in its valence shell because of its high
a-E.A values
b-I.E values
c-E.N values
d-noe of the above

25-dipole moments are measured in
a-coloumb metere
b- Nm
c-Jm
d-J

26-Which of the following has the greater bond distance
a-HF
b-HBr
c-HCl
d-HI

27-an atom of an element consist of 5 protons, neutrons,2k electrons and 3 L Electrons.the mass num of this atom is
a-13
b-9
c-8
d-5

28-the num of orbitals t\in d subshell is
a-1
b-3
c-4
d-5

29- valence bond theory is unable to explain
a-paramagnetism of O2 moecule
b-shape ofO2 molecule
c-stability ofN2 molecule
d-double and triple bond