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In body centred cubic structure the space occupied is about
(A) 68% (B) 53%
(C) 38% (D) 32%
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
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
Distinguish between crystalline solid and amorphous solid
State Kohlrausch Law and write mathematical expression of molar conductivity of the given solution at infinite dilution.
Write cell reaction in lead storage battery during discharge.
Draw structure and write geometry of PCl3 and PCl5.
Mention names and formulae of two ores of alumunium.
Derive the relationship between relative lowering of vapour pressure and molar mass of nonvolatile solute.
What is pseudo first order reaction? Give one· example of it.
Calculate the mole fraction and molality of HNO3 in solution contaning 12.2%HNO3 (Given atomic mases:H=1, N=13,O=16)
What is the action of following regents on ammonia?
a. Excess of air
b. Excess of chlorine
c. Na Metal
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)
c. Define Osmosis
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
Calculate magnetic moment of `Fe_((aq))^(2+) ion (Z=26).`
How is ethanol prepared from methanal by using Grignard reagent?
Write the chemical reaction to prepare novolac polymer.
Why does p-nitrochlorobenzene undergo displacement reactions readily with attack of nucleophilic HOΘ ion?
Define antioxidants and mention two examples.
How is 4-methylpent-3en-2-one obtained from propan-2-one?
What are hormones? Write the structure of simple triglycerides.
Write the different oxidation states of manganese. Why + 2 oxidation state of manganese is more stable?
Write the structure of a nucleotide
Write the structure of a nucleoside
Define complex lipids
Write the fomulae of the following compounds
a. Sodium hexanitrito- N - cobaltate (III)
b. Tetraaquodichlorochromium (III) chloride
c. Potassium tetracyanoaurate (III) ion