Silver article turns black when kept in the open for a few days due to formation of
The decreasing order of the first ionization energy of the following elements is
Which of these compounds are not aromatic in character ?
R- alanine is represented by______
Toluene when refluxed with bromine in the Presence of light gives mainly______
An element X on exposure to moist air turns reddish-brown and a new compound Y is formed. The substance X and Y are
If a Particle has linear momentum then its angular momentum is ________
The chemical formula of lead sulphate is
An electron is found in an orbital with one radial node and two angular nodes. Which orbital electron is it ?
For 4d orbital, n = 4 and l = 2
Number of radial nodes = n - l -1 = 4 - 2 - 1 = 1
Number of angular nodes = l = 2
The number of angular and radial nodes of 4d orbital are 2 and 1 respectively.
n- simple molecule of solute A associate in solution as The degree of association is x. what is the number of particles at equilibrium ?
The final product of the reaction is:
In the given reaction -
reagent may be:
In the given reaction sequence
(B) is _______
Chloroform when react with hv Phosgene (CCl2O).
and when phosgene react with alcohol dialkyl carbonate is produced.
In the given reaction
In the given reaction
When sulphanilic acid is treated with excess of bromine water, it gives _____
Which of the following will be more reactive for E1 reaction?
The shape of which one of the orbitals corresponds to the angular wave function in the figure given above ?
The ground stable energy of hydrogen atom is - 13.6 ev what is the ground state energy of atom?
For n=1 me -13.6ev and n=2 me -3.4ev then excitation energy = final - initial energy then 10.2ev.
Taking into account the isoelectronic Principle and VSEPR Theory, predict in which one of the following pairs, both molecular species have Pyramidal geometry ?
XeF3+ belongs to which one of the following AXnEm nomenclature (A = Central, X = singly bonded liquid and E = an unshared electron pair) ?
Consider the 0.1N aqueous solutions of the following electrolytes:
The correct sequence of their increasing ph is
The molecule N (Sime3)3 has a
Haemoglobin a complex containing iron is a constituent of blood. The oxidation state of iron of the complex is ________
Match list- I (The metallozymes) with list- II (The metal present in the enzyme) and select the correct answer using the codes given below the lists:
The isomerism that are possible in the w(III) complexes [Co(NH3)3 (NO2/3)] and [Co(NH3)3 NO2]Cl2 respectively, are _______
For the reaction :
2Cl(g) → Cl (g)
the thermodynamic properties
For an enzyme catalysed reaction
Where the symbol have their usual meaning, using the steady state approximation for [ES]. The overall rate equation workout to be
The standard oxidation potential of copper and silver electrodes are -
Respectively, an electrochemical cell containing a copper electrode dipping in a 0.1m CuSO4 solution and a silver electrode dipping in a 0.1m AgNO3 solution is formed using a salt bridge when current is drawn from the cell.
Which of the following are aromatic ?
Which of the following compounds has (L) configuration ?
Which among these can exist tautomerism ?
Lysione is not used as :
Which of the following is correct about ΔG ?
The angular momentum of electron can have the value (s) ___
The correct starting material and product of different disintegration series are______
In which of the following set, both the species are isoelectronic and and isostructural?
Which of the following statement is/are correct
In which of these compounds does the carbon atom (underlined) nor use Sp3 hybridization for bond formation.
How many d- electrons in Cu+ (At. No. = 29) can have the spin quantum number
One gram of 226Rq has an activity of nearly 1 Ci. The half life of 226Ra is ____ years.
The non- compressive volume of a gas is ____ times than the actual volume of gas molecules.
Calculate the enthalpy of the following reaction :
H2C = CH2(g) + H2(g) → CH3 – CH3(g)
The bond energies of C- H, C- C, C=C and H- H are 99, 83, 147 and 104 kcal respectively.
For a reaction A+B → C+D. If the concentration of A is doubled without altering the concentration of B, the rate gets doubled, if the concentration of B is increased by nine times without altering the concentration of A, the rate gets tripled. The order of reaction is _____
For the hopothetical reactions, the equilibrium constant (k) values are given below:
The equilibrium constant (k) for the reaction
What current strength in ampere will be required to liberate 10g of chlorine from sodium chloride solution in one hour?
How many stereoisomers exist with the following basic connectivity?
Br CH2 CH (CH3). CH2 CH3
Use the following data to answer the question below:
The resonance energy of anthracene is _____
From first reaction we see that for hydrogenation of one double bond we need -28.6 kcal energy.And we know that anthracene contain 7 double bond .So calculated value of hydrogenation of anthracene is (7*-28.6=-200.2).
Resonance energy =Experimental -Calculated
Density of lithium atom is 0.53 g/cm3. The edge length of Li is 3.5 A°. Find out the number of lithium atoms is a unit cell. (N0 = 6.022 x1023/mol& M = 6.94)
What value of n in Huckel's rule applies to the aromatic compound shown above?
When methyl glucopyranoside reacts with periodic acid, how many moles of the oxidising agent are consumed per mole of sugar ?
How many isomeric aldehydes are possible with formula C5H10O ?
The ionic radius of the fluoride ion is ____ using only the following interionic distance and the radius of the iodide ion 2.19A°.
How many nearest, neighbours are there in an atom or ions for an octahedral hole of a closed packed structure ?
In hydrogen atom, energy of first excited state is - 3.4ev, then the K.E. of same orbital of hydrogen atom is ____ev
The molecular MLx is planar with 7 pairs of electrons around M in the valence shell, the value of x is ______.
In the electronic structure of H2SO4, the total number of unshared electrons is ____.
The dissociation constant of a substituted benzoic acid at 25°C is 1.0 × 10–4. The pH of a 0.01 M solution of its sodium salt is _______.
An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium (III) chloride. The number of moles of AgCl precipitate would be