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 kA = 1015 e-2000/T
C → D kc = 1014 e-1000/T
Temperature T/K at which (kA = kc) 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 AgNO3 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 As2S3 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. V2O5 I. High density polythene
B. Ziegler-Natta II. Poly acrylonitrile
C. Peroxide III. NH3
D. Finely divided Fe IV. H2SO4
The rate constant for the reaction, N2O5(g) → 2NO2 +1/2 O2(g) is 2.3 x 10-2 sec-1. Which equation given below describes the change of [N2O5] with time [N2O5]0 and [N2O5]t correspond to concentration of N2O5 initially and time ‘t’ ?
A cell ; Cu/Cu2+ (1M) || Zn2+ (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) + Ag2O(s) + H2O(l) → 2Ag(s) + Zn2+(aq) + 2OH- (aq)
If half cell potentials are
Zn2+ (aq) + 2e- → Zn(s); E0 = -0.76V
Ag2O(s) + H2O(l) + 2e- → 2Ag(s) + 2OH- (aq), E0 = 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/Zn2+ (1M)|| X2+ (1M)/X is found to be 1.1V . If E�red of Zn2+/Zn is – 0.76 V, then of X is
If H2SO4 is added to water, then the solution
In a 0.2 molal aqueous solution of AB having degree of dissociation is 0.3, taking Kf 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 –1.860C m-1. If 5.00 g Na2SO4 is dissolved in 45.0 g H2O, the freezing point is changed by –3.820C. Calculate the van’t Hoff factor for Na2SO4
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 = K1 [RCl]. the rate of the reaction will be
During electrolysis of H2O, volume of H2 and O2 are released in the mole ratio
A first order reaction, which is 30% complete in 30 minutes, has a half-life period of
An endothermic reaction with high activation energy for the forward reaction is given by the diagram
In a gaseous phase reaction, A2 (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 A2 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 SO2 in the reaction; 2SO2 + O2 → 2SO3 ; is 1.28 x 10-3 g litre-1 sec-1.Then the rate of formation of SO3 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 E1. When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the e.m.f., changed to E2. What is the relationship between E1 and E2 ?
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 (H2) at NTP produced at cathode will be
Electrode potential for Mg electrode varies according to the equation .
The graph of vs log[Mg2+] is
Which of the following is correct statement for the spontaneous adsorption of a gas ?
Which of the following will behave as n-type 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 first-order decomposition of A molecular in three vessels of equal volume.
Relative rates of decomposition in I, II and III are