1-Phenylethanol can be prepared by the reaction of benzaldehyde with:
Phenols are more acidic than alcohols because ______.
Phenol is more acidic than cyclohexanol and acyclic alcohols because the phenoxide ion is more stable than the alkoxide ion. In an alkoxide ion, such as the one derived from cyclohexanol, the negative charge is localized at the oxygen atom.
Which is most ionic?
For a compound to be ionic there must be:
Lesser the number of charge, which is there in MnO.
Electrophiles are ______.
The effect of atoms or groups loosing electrons towards a carbon atom is called:
Electronic configuration of deuterium atom is:
If principal quantum no. of atom is 3, then its azimuthal quantum number is:
Principle quantum no. (n) represent shell no. while azimuthal quantum no. (l) represent sub shell no.
Among the following the achiral amino acid is:
It is achiral as it has two (−CH2OH)(−CH2OH) groups
Which of the following is paramagnetic species?
KO2 is a superoxide having anion as( O2)^(-1) and so number of valence electrons = odd and hence it is paramagnetic
The IUPAC name for the complex
[Co(NO2) (NH3)5] Cl2 is :
The IUPAC name of the given coordination complex according to the nomenclature rules is Pentamminenitrito-N-cobalt(III)chloride. Hence the correct option is B.
How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?
An octahedral complex has 6 bonds around the central atom. One EDTA molecule complexes with one molecule of calcium cation to form octahedral complex.
The correct IUPAC name of the structure given below is :
Low spin complexes are generally formed by the elements of:
This is because pairing in these (5d & 4d series) elements does not depend upon strength of ligand. it takes almost always, forming low spin complex, unlike 3-d series elements , pairing in 3d series elements depends upon strength of ligand.
Which of the following is not correct?
There are three sigma bonds and three pi bonds showing a hybridization type: sp3 type.
When HCl gas is passed through a saturated solution of common salt, pure NaCl is precipitated because
But-1-ene and cyclobutane exhibit :
But-1-ene and cyclobutane exhibits ring chain isomerism.
Which of the following is used in paints?
It is a thermosetting plastic. It is obtained by condensation of ethylene glycol and phthalic acid or glycerol and phthalic acid. When its solution in a suitable solvent is evaporated, it leaves a tough but non-flexible film. It is, therefore, used in the manufacture of paints and lacquers.
Which of the following statement is correct with respect to property of elements with an increase in atomic no. in the carbon family?
A non-volatile electrolyte dissolved in an aqueous solution in same molal proportion as non-electrolyte produces ______.
Which of the following alkali metals has the highest tendency for the half cell reaction?
M(g) → M(g)+ + e-
As the given reaction is oxidation reaction and lithium has highest oxidation potential, so it has highest tendency for this half reaction.
Determine total number of atoms in per unit formula of (A), (B) & (C).
(A) = CrO2Cl2
(B) = Na2CrO4
(C) = CrO5
4 mole of a mixture of Mohr's salt and Fe2(SO4)3 requires 500 mL of 1 M K2Cr2O7 for complete oxidation in acidic medium. The mole % of the Mohr's salt in the mixture is :-
FeSO4 (NH4)2 SO4 . 6H2O + Fe2 (SO4)3
x mol (4–x) mol
∵ (Eq) K2Cr2O7 = (Eq) Mohr solt
(Cr+6 → Cr+3) (Fe+2 → Fe+3)
N × V(L) = mol × n factor
1 × 6 × 0.5 = x × 1
x = 3 mol
The half-life of decomposition of gaseous CH3CHO at initial pressure of 364 mm and 182 mm of Hg were 440 sec and 880 sec respectively. The order of the reaction is :-
If rate of formation of SO3 is 0.8 g.lit–1.sec–1 then calculate the rate of disappearance of O2 in g.lit–1.sec–1 for the reaction 2SO2 + O2 → 2SO3
The total number of possible isomers with molecular formula C6H12 that contain a cyclobutane ring.