Which of the following is not correctly matched ?
A 5% solution by mass of cane sugar in water has freezing point of 271 K and freezing point of pure water is 273.15 K. The freezing point of a 5% solution (by mass) of glucose in water is
A → B k_{A} = 10^{15} e^{2000/T}
C → D k_{c} = 10^{14} e^{1000/T}
Temperature T/K at which (k_{A} = k_{c}) is
The vapour pressure of mixture of 1 mol = 150Torr) and 2 mol = 240Torr) is 200 mm. In this case
In a first order reaction, A → P , the ratio of a/(a–x) was found to be 8 after 60 minutes. If the concentration is 0.1 M, then the rate of reaction in moles of A reacted per minute is
On adding AgNO_{3} solution into KI solution, a negatively charged colloidal sol is obtained when they are in
Most effective of electrolyte causing coagulation of a negatively charged As_{2}S_{3} sol is
When 0.1 mol is oxidised the quantity of electricity required to completely oxidise to is
Match the following correctly
Catalyst Industrial product
A. V_{2}O_{5} I. High density polythene
B. ZieglerNatta II. Poly acrylonitrile
C. Peroxide III. NH_{3}
D. Finely divided Fe IV. H_{2}SO_{4}
The rate constant for the reaction, N_{2}O_{5}(g) → 2NO_{2} +1/2 O_{2}(g) is 2.3 x 10^{2} sec^{1}. Which equation given below describes the change of [N_{2}O_{5}] with time [N_{2}O_{5}]_{0} and [N_{2}O_{5}]_{t} correspond to concentration of N_{2}O_{5} initially and time ‘t’ ?
A cell ; Cu/Cu^{2+} (1M)  Zn^{2+} (1M)/Zn should have cell voltage
Number of atoms per unit cell for body centred tetragonal system is
Maximum freezing point will be for 1 molal solution of, assuming equal ionisation in each case
Select incorrect statement
Which of the following arrangements shows schematic alignment of magnetic moments of antiferromagnetic substances ?
A button cell used in watches functions as following
Zn(s) + Ag_{2}O(s) + H_{2}O(l) → 2Ag(s) + Zn^{2+}(aq) + 2OH^{} (aq)
If half cell potentials are
Zn^{2+} (aq) + 2e^{} → Zn(s); E^{0} = 0.76V
Ag_{2}O(s) + H_{2}O(l) + 2e^{} → 2Ag(s) + 2OH^{} (aq), E^{0} = 0.34V
Relation between atomic radius (r) and edge length (a) of a body centred cubic unit cell is
The emf of the cell Zn/Zn^{2+} (1M) X^{2+} (1M)/X is found to be 1.1V . If E�red of Zn^{2+}/Zn is – 0.76 V, then of X is
If H_{2}SO_{4} is added to water, then the solution
In a 0.2 molal aqueous solution of AB having degree of dissociation is 0.3, taking K_{f} for water as 1.85K molality^{1}, the freezing point of the solution will be nearest to
Which solution will show maximum elevation in b.pt.?
The freezing point depression constant for water is –1.86^{0}C m^{1}. If 5.00 g Na_{2}SO_{4} is dissolved in 45.0 g H_{2}O, the freezing point is changed by –3.82^{0}C. Calculate the van’t Hoff factor for Na_{2}SO_{4}
In Freundlich adsorption isotherm, the value of 1/n is
What will be the molecular weight of NaCl determined experimentally following elevation in the boiling point or depression in freezing point method ?
The rate law for the reaction;
RCl + NaOH_{(aq.)} → ROH + NaCl is given by, Rate = K_{1} [RCl]. the rate of the reaction will be
During electrolysis of H_{2}O, volume of H_{2} and O_{2} are released in the mole ratio
A first order reaction, which is 30% complete in 30 minutes, has a halflife period of
An endothermic reaction with high activation energy for the forward reaction is given by the diagram
In a gaseous phase reaction, A_{2} (g) → B(g) + (1/2) C(g) , the increase in pressure from 100 mm to 120 mm is noticed in 5 mins. The rate of disappearance of A_{2} in mm min^{1} is
The rate constant of a reaction is 3 x 10^{6} per sec. If the initial concentration is 0.10 M, the initial rate of reaction is
Which among the following is incorrect about Schottky defects ?
In which of the following reactions heterogeneous catalysis is involved ?
The rate of disappearance of SO_{2} in the reaction; 2SO_{2} + O_{2} → 2SO_{3} ; is 1.28 x 10^{3} g litre^{1} sec^{1}.Then the rate of formation of SO_{3} in g litre^{1} sec^{1} is
Which of the following reactions is used to make a fuel cell ?
Bleeding is stopped by the application of ferric chloride. This is because
Which kind of defects are introduced by doping ?
The e.m.f., of a Daniel cell at 298 K is E_{1}. When the concentration of ZnSO_{4} is 1.0 M and that of CuSO_{4} is 0.01 M, the e.m.f., changed to E_{2}. What is the relationship between E_{1} and E_{2} ?
For a first order reaction A → B the reaction rate at reactant concentration of 0.01 M is found to be 2.0 x 10^{5} M sec^{1}. The half life period of the reaction is
When an electric current of 0.5 ampere is passed through acidulated water for two hours, then volume of hydrogen (H_{2}) at NTP produced at cathode will be
Electrode potential for Mg electrode varies according to the equation .
The graph of vs log[Mg^{2+}] is
Which of the following is correct statement for the spontaneous adsorption of a gas ?
Which of the following will behave as ntype semiconductor ?
Which one is not equal to zero for an ideal solution ?
In the closest packed structure of a metallic lattice, the number of nearest neighbours of a metallic atom is
Consider the firstorder decomposition of A molecular in three vessels of equal volume.
Relative rates of decomposition in I, II and III are








