An element, x has the following isotopic composition l.
0.75g plantic chloride, a monoacid base on ignition gave 0.245g plantinum. The molecular weight of the base is
What is the concentration of nitrate ions if equal volumes of o.1 M AgNO3 and 0.1 M NaCI are mixed together
74.5g of a metallic chloride contain 35.5 g of chlorine The equivalent weight of the metal is
Number of atoms in 558.5g Fe (At. wt. 55.85) is
The number of stereoisomers obtained by bromination of trans-2-butene is
2.76 g of silver carbonate on being strongly heated yields a residue weighing
the density of a solution presented by dissolving 120 g of urea
If Na is avogadros number then number of valence electrons in 4.2 g of nitride icons N^3_ is
How many significant digits are there in 0.5?
Number of moles of MnO4 required to oxidize one mole of ferrous oxalate completely in acidic medium will be :
The correct order for homolytic bond dissociation energies (AH in kcal/mol) for CH4 (A), C2 H6 (B) and CH3 Br (C), under identical..
In an experiment it showed that 10 ml of 0.05 M solution of chloride required 10 ml of 0.1 M solution of AgNO3, which of the follo..
Boron has two stable isotopes, 10 B (19%) and 11 B(18%). Average atomic weight for boron in the periodic table is
The molecular weight of O2 and SO2 and 32 and 64 respectively. At 15 degree C and 150 mm Hg pressure, one litre of O2 contains N m..
Chlorobenzene is o, p -directing in electrophilic substitution reaction. The directing influence is explained by
a gaseous hydrocarbon gives upon combustion, 0.72 g
The weight of a molecule of the compound C60 H1
Density of a 2.05 M solution of acetic acid water is 1.02
1 L oxygen gas at STP will weigh
The same amount of zinc is treated separately with excess of sulphuric acid and excess of solution hydroxide. What will be the rat..
arrange the carbanions, (CH3)3 C, CCI3,
An element, X has the following isotopic composition:
200X:90%, 190X:8.0%, 202X:2.0%
Identify, which of the below does not possess any element of symmetry ?
Which kind of fission is favoured by sunlight?
The maximum number of possible optical isomers in 1-bromo-2-methyl cyclobutane is
The state of hybridization of C2, C3, C5 and C6 of the hydrocarbon,
The maximum number of molecules is present in
Which is the most stable carbocation?
Haemoglobin contains 0.334 % of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron ato..
The reaction intermediate produced by homolytic cleavage of a bond is called
Optical isomerism is shown by
Geometrical isomerism is possible in
Geometry of methyl free radical is
Least stable conformer of cyclohexane is
In the hydrocarbon
The correct order regarding the electronegativity of hybrid orbitals of carbon is
The drug which is used for treating AIDS victims is
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