Caffeine has a molecular weight of 194. If it contains 28.9% by mass of nitrogen, number of atoms of nitrogen in one molecule of c..
What volume of NH3 gas at STP would be needed to prepare 100 ml of 2.5 molal (2.5m) ammonium hydroxide solution
The number of oxygen atoms in 4.4 g of CO2 is
What is the mass of precipitate formed when 50 mL of 16.9 % solution of AgNO3 is mixed with 50 mL of 5.8% NaCI solution?
the density of a solution presented by dissolving 120 g of urea
0.75g plantic chloride, a monoacid base on ignition gave 0.245g plantinum. The molecular weight of the base is
74.5g of a metallic chloride contain 35.5 g of chlorine The equivalent weight of the metal is
What is the concentration of nitrate ions if equal volumes of o.1 M AgNO3 and 0.1 M NaCI are mixed together
The number of oxygen atoms 4.4g of CO2 is
The number of stereoisomers obtained by bromination of trans-2-butene is
An element, x has the following isotopic composition l.
2.76 g of silver carbonate on being strongly heated yields a residue weighing
How many significant digits are there in 0.5?
The correct order for homolytic bond dissociation energies (AH in kcal/mol) for CH4 (A), C2 H6 (B) and CH3 Br (C), under identical..
Number of moles of MnO4 required to oxidize one mole of ferrous oxalate completely in acidic medium will be :
Chlorobenzene is o, p -directing in electrophilic substitution reaction. The directing influence is explained by
If Na is avogadros number then number of valence electrons in 4.2 g of nitride icons N^3_ 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..
Number of atoms in 558.5g Fe (At. wt. 55.85) is
a gaseous hydrocarbon gives upon combustion, 0.72 g
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..
The weight of a molecule of the compound C60 H1
1 L oxygen gas at STP will weigh
Density of a 2.05 M solution of acetic acid water is 1.02
Boron has two stable isotopes, 10 B (19%) and 11 B(18%). Average atomic weight for boron in the periodic table is
arrange the carbanions, (CH3)3 C, CCI3,
The same amount of zinc is treated separately with excess of sulphuric acid and excess of solution hydroxide. What will be the rat..
Which kind of fission is favoured by sunlight?
Identify, which of the below does not possess any element of symmetry ?
An element, X has the following isotopic composition:
200X:90%, 190X:8.0%, 202X:2.0%
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,
Which is the most stable carbocation?
Least stable conformer of cyclohexane is
Geometrical isomerism is possible in
Optical isomerism is shown by
The maximum number of molecules is present in
The reaction intermediate produced by homolytic cleavage of a bond is called
Geometry of methyl free radical is
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