- The equilibrium of two readily interconvertible isomers is called:?
a) Stereoisomerism
b) Metamerism
c) Tautomerism
d) None of these - Which of the following compounds exhibit geometrical isomerism?
a) 1-Pentene
b) 2-Pentene
c) 2-methyl –2-Pentene
d) None of these
53.Ex. 10.0 grams of Aluminum reacts with 35.0 grams of chlorine gas to produce aluminum chloride. Which reactant is limiting and how much product is being produced??
a) Cl/40g
b) Al/40g
c) Cl/44g
d) Al/44g
- The Radiactive isotope used for testing deep-seated cancer growth is: (PPSC-2017)?
a) I-131
b) P-30
c) Co-60
d) P-32 - Stability of nucleus is due to : (PPSC-2015)?
a) Proton and neutron
b) Proton and electron
c) Neutron and electron
d) None of these - The chemical Formula of Picric acid is : PPSC-2017?
a) C6H3N3O9
b) C5h3n3o7
c) C4H3N3O7
d) C6H3N3O7 - Which of the following is an example of liquid in gas solution?
a) Opals
b) Dust particles in smoke
c) Paints
d) Fog - Which has the minimum freezing point?
a) One Molal NaCI
b) One molal KCI solution
c) One molal CaCI2
d) None of these - When common salt is dissolved in water?
a) The boiling point of water decreases
b) The boiling point of water increase
c) The boiling point of water remains the same
d) None of the above - In which of the following manner the carbon layers are arranged in the graphite structure?
a) ABCABC
b) AAAAAA
c) CBACBA
d) ABABAB - Calculate the mass of 0.2 mol of Sulphuric acid,H2SO4.?
a) 17.6g
b) 18.6g
c) 19.6g
d) None of these - Which of the following is not a crystal system?
a) Cubic
b) Trigonal
c) Triclinic
d) Hexaclinic - Viscosity of liquid _ with rise in temperature?
a) Increases
b) Decreases
c) Remains constant
d) Is independent - What is S.I. unit of Surface Tension?
a) Dyne/meter
b) Newton-meter
c) Newton/meter
d) Dyne-meter - What is the boiling point at pressure 1 atm known as?
a) Standard boiling point
b) Normal boiling point
c) Van der Waal boiling point
d) All of these - Which of these gases diffuse more quickly than oxygen?
a) H2S
b) NO
c) Cl2
d) N2O - Which of the following statements is true about plasma?
a) It may be the first state of matter
b) It is not a phase transition
c) It is a conductor of electricity
d) All of the above - Hydrogen gas was prepared by reaction of Zinc with HCl. If 2.5L of H2 gas was prepared at 103kPa and 25C.Calculate Mass of Zinc Required for reaction?
a) H2S
b) NO
c) Cl2
d) N2O - When equilibrium is reached inside the two half-cells of the electrochemical cells, what is the net voltage across the electrodes?
a) > 1
b) < 1
c) = 0
d) Not defined - Which of the following conditions are satisfied when the cell reaction in the electrochemical cell is spontaneous?
a) ΔG° > 0
b) E°cell < 0
c) E°cell = 0
d) ΔG° < 0 - Calculate the equilibrium constant for the reaction Fe + CuSO4 ⇌ FeSO4 + Cu at 25°C.(Given E°(OP/Fe) = 0.5 V°, E°(OP/Cu) = -0.4 V)?
a) 3.46 × 1030
b) 3.46 × 1026
c) 3.22 × 1030
d) 3.22 × 1026 - Which of the following will lead to an increase in the rate of the reaction?
a) Decrease in temperature
b) Decreasing concentration of reactants
c) Addition of catalyst
d) All of these - Which of the following explains the increase in the reaction rate by a catalyst?
a) Catalyst decreases the rate of backward reaction so that rate of forward reaction increases
b) Catalyst provides extra energy to reacting molecules so that they produce effective collisions
c) Catalyst provides an alternative path of lower activation energy to the reactants
d) Catalyst increases the number of collisions between the reacting molecules.
74.What happens to the rate of the reaction on increasing its temperature?
a) Rate of reaction increases
b) Rate of reaction decreases
c) Rate of reaction fluctuates between its maxima and minima
d) Rate of reaction is independent of temperature
- Diamond is an example of _?
a) solid with hydrogen bonding
b) electrovalent solid
c) covalent solid
d) None of these
