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For a gaseous reaction the unit of rate of reaction is
(A) L atm s-1
(B) atm mol-1 s-1
(C) atm s1
(D) mol s
Which of the following compounds contain S = O as well as S = S bonds?
(A) Sulphuric acid
(B) Thiosulphuric acid
(C) Sulphurous acid
(D) Thiosulphurous acid
Which of the following solutions shows maximum depression in freezing point?
(A) 0.5 M Li2SQ4
(B) 1 M NaCl
(C) 0.5 M A12(SO4)3
(D) 0.5 MBaC12
For a chemical reaction ΔS=0.035 kJ/k and ΔH=20kJ.
(A) 5.14 K
(B) 57.14 K
(C) 571.4 K
(D) 5714.0 K
The standard e.m.f of the following cell is 0.463 V
What is the standard potential of Cu electrode?
(A) 1.137 V
(B) 0.337 V
(C) 0.463 V
(D) - 0.463 V
Fe2O3 is reduced to spongy iron near the top of blast furance by
State Kohlrausch Law
Write mathematical expression of molar conductivity of the given solution at infinite dilution.
Derive the relationship between relative lowering of vapour pressure and molar mass of nonvolatile solute.
Calculate the mole fraction and molality of HNO3 in solution contaning 12.2%HNO3 (Given atomic mases:H=1, N=13,O=16)
Consider the reaction-
At particular time t, `(d[SO_4^(2-)])/dt=2.2xx10^(-2)"m/s"`
What are the values of the following at the same time?
300 M mol of perfect gas occupies 13 L at 320 K. Calculate the work done in joules when the gas expands-
(a) isothermally against a Constant external pressure of 0.20atm.
(b) isothermal and reversible process.
(c) into vaccum until the volume of gas is increased by 3L (R=8.314J mol-1 K-1)
What is the action of following regents on ammonia?
a. Excess of air
b. Excess of chlorine
c. Na Metal
Explain the following term
Explain the following term
Gold occurs as face centred cube and has a density of 19.30 kg dm-3. Calculate atomic radius of gold (Molar mass of Au=197)
a. Explain the trends in the following properties with reference to group 16:
1 Atomic radii and ionic radii
3 ionisation enthalpy
b. In the electolysis of AgNO3 solution 0.7g of Ag is deposited after a certain period of time. Calulate the quantity of electricity required in coulomb. (Molar mass of Ag is 107.9g mol-1)
ln which pair highest oxidation states of transition metals are found:
(A) nitriles and chlorides
(B) fluorides and chlorides
(C) fluorides and oxides
(D) nitriles and oxides
Compound having general formula is called
(B) acid anhydride
The complex ion `[Co(H_2O)_5 (ONO)]^(2+) `
(A) linkage isomer
(B) ionisation isomer
(C) co-ordination isomer
(D) geometrical isomer
Inflammation af tongue is due to the deficiency of:
(A) Vitamin B1
(B) Vitamin B2
(C) Vitamin B5
(D) Vitamin B6
Identify the compound 'B' in the following series of reaction:
(A) n-propyl chloride
(C) n-propyl alcohol
(D) Isoproply alcohol
Which of the following reagents is best for the following conversion?
(C) H2/Ni, 453 K
Why does p-nitrochlorobenzene undergo displacement reactions readily with attack of nucleophilic HOΘ ion?
Write the different oxidation states of manganese.
Why +2 oxidation state of manganese is more stable?
How are the following compounds prepared?
a. benzaldehyde from benzene
b. acetophenone from benzene
c. benzaldehyde from benzoyl chloride
Write the fomulae of the following compounds
a. Sodium hexanitrito- N - cobaltate (III)
b. Tetraaquodichlorochromium (III) chloride
c. Potassium tetracyanoaurate (III) ion
Explain the following term:
b.Explain the mechanism of cleansing action of soaps.
c.Write balanced chemical equations for the action of
1. phosphorous trichloride on propan-2-ol
2. hydrogen bromide on styrene in the presence of a peroxide
3. methyl bromide on silver propanoate