One gram of hydrogen is found to combine with 80 g of bromine the equivalent weight of calcium is
The correct order for homolytic bond dissociation energies (AH in kcal/mol) for CH4 (A), C2 H6 (B) and CH3 Br (C), under identical..
2.76 g of silver carbonate on being strongly heated yields a residue weighing
What volume of NH3 gas at STP would be needed to prepare 100 ml of 2.5 molal (2.5m) ammonium hydroxide solution
An element, x has the following isotopic composition l.
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
Chlorobenzene is o, p -directing in electrophilic substitution reaction. The directing influence is explained by
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..
IUPAC name of CH3 COCH (CH3)2 is
Number of moles of MnO4 required to oxidize one mole of ferrous oxalate completely in acidic medium will be :
The weight of a molecule of the compound C60 H1
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..
which is wrong IUPAC name ?
arrange the carbanions, (CH3)3 C, CCI3,
Boron has two stable isotopes, 10 B (19%) and 11 B(18%). Average atomic weight for boron in the periodic table is
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
Density of a 2.05 M solution of acetic acid water is 1.02
a gaseous hydrocarbon gives upon combustion, 0.72 g
The number of stereoisomers obtained by bromination of trans-2-butene is
Which has maximum number of atoms?
An element, X has the following isotopic composition:
200X:90%, 190X:8.0%, 202X:2.0%
Which kind of fission is favoured by sunlight?
The state of hybridization of C2, C3, C5 and C6 of the hydrocarbon,
The maximum number of possible optical isomers in 1-bromo-2-methyl cyclobutane is
Identify, which of the below does not possess any element of symmetry ?
Least stable conformer of cyclohexane is
Optical isomerism is shown by
Geometrical isomerism is possible in
Geometry of methyl free radical is
The correct order regarding the electronegativity of hybrid orbitals of carbon is
Haemoglobin contains 0.334 % of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron ato..
The maximum number of molecules is present in
Which is the most stable carbocation?
The reaction intermediate produced by homolytic cleavage of a bond is called
The IUPAC name of the following compound is
In the hydrocarbon
The drug which is used for treating AIDS victims is
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