What volume of NH3 gas at STP would be needed to prepare 100 ml of 2.5 molal (2.5m) ammonium hydroxide solution
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..
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?
Number of atoms in 558.5g Fe (At. wt. 55.85) is
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
The number of oxygen atoms 4.4g of CO2 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
2.76 g of silver carbonate on being strongly heated yields a residue weighing
The number of stereoisomers obtained by bromination of trans-2-butene is
How many significant digits are there in 0.5?
If Na is avogadros number then number of valence electrons in 4.2 g of nitride icons N^3_ is
the density of a solution presented by dissolving 120 g of urea
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..
a gaseous hydrocarbon gives upon combustion, 0.72 g
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..
Boron has two stable isotopes, 10 B (19%) and 11 B(18%). Average atomic weight for boron in the periodic table is
Chlorobenzene is o, p -directing in electrophilic substitution reaction. The directing influence is explained by
The weight of a molecule of the compound C60 H1
Density of a 2.05 M solution of acetic acid water is 1.02
The same amount of zinc is treated separately with excess of sulphuric acid and excess of solution hydroxide. What will be the rat..
1 L oxygen gas at STP will weigh
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?
Which is the most stable carbocation?
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
Haemoglobin contains 0.334 % of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron ato..
Geometrical isomerism is possible in
The reaction intermediate produced by homolytic cleavage of a bond is called
Geometry of methyl free radical is
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