With respect to electrophilic aromatic substitution, reactivity order of pyrrole, pyridine, furan and indole is:
The major product of the following reaction is:
Which has least negative ∆combH?
In a multi layered close-packed structure:
Red color complex ion formed on adding FeCl3 to sodium extract, when N and S both are present in organic compounds is:
The thermal stability among B2X4 is:
The reaction that yields Li[AlH4] is:
Vairation of log10 K with1/T is shown by the following graph in which straight line is at 45°, hence ∆H° is:
Release of O2 from oxy-haemoglobin is favoured by
Hydrolysis of sucrose is called?
How many sigma and pi bonds are present in tetracyanoethylene?
Arrange the following in increasing order of C-O stretching frequency
(I) CO (II) (NH3)5M(CO) (III) CO+ (IV) (PH3)5M(CO) (V) (PF3)5MCO
The process of removing lighter gangue particles by washing in a current of water is called:
Low oxidation state complexes are often air-sensitive, but are rarely water sensitive because:
Plot of magnetic susceptibility with temperature show variation as given below. Such behaviour corresponds to:
Identify the product of the following reaction
The suitable reaction steps for the following transformation:
Major product formed in the given reaction is:
Consider following reagent:
(I) Br2 water (II) Tollen's reagent (III) Fehling's solution
Which can be used to make distinction between an aldose and a ketone?
Major product formed during the given reaction is:
For a particle with projection r = 2i – 3j + k and momentum p = i + 2j – 2k in meter and Kg m/sec respectively, calculate the magnitude of angular momentum:
If the radius of first Bohr orbit be ao, then the radius of third orbit would be:
In the following radioactive decay, 232X92 → 220Y89. How many a and β- particles are ejected from X to form Y?
If excluded volume is taken zero, compressibility factor Z is
At a certain temperature vapour pressure of pure ether is 646 mm and that of pure acetone is 283 mm. Calculate the mole fraction of each component in the vapour state if the mole fraction of ether in the solution is 0.50?
Compounds K2Ba[Cu(NO2)6] (A) and Cs2Ba[Cu(NO2)6] (B) exhibit tetragonal elongation and tetragonal compression, respectively. The unpaired electron in A and B are found respectively, in orbitals:
The correct order of energy level of d-orbital or ferrocene is:
Calculate ΔH at 358 K for the reaction
Given that DH298 = – 33.29 kJ mole–1 and Cp for Fe2O3(S), Fe(s), H2O(l) and H2(g) are 103.8, 25.1, 75.3 and 28.8 J/k mole respectively.
The virial expansion for a real gas can be written in either of the following forms:
If Bv = aBp, the value of a would be
In the 1H NMR spectrum of myrtenal, the two methyl groups are expected to display signals at (chemical shift values (δ) m ppm)
Which of following compound(s) is/are aromatic:
Which of the following statement(s) is/are true?
Which of the following statements are correct:
Among the following, the amino acid(s) which is/are acidic in nature:
At 35°C, the vapour pressure, of CS2 is 512 mmHg, and of acetone is 344 mmHg. A solution of CS2 and acetone, is which the mole fraction of CS2 is 0.25, has a total vapour pressure of 600 mmHg
Which of the following statements is/are correct?
Which of the following indicator(s) is/are used in the complexometric titration for the estimation of Mg2+:
The correct statement(s) pertaining to the adsorption of a gas on a solid surface is(are):
Based on the behavior of the metalloenzymes, choose the correct statement(s):
Which of the following reaction conversion is/are correct:
Identify the pairs in which the covalent radii of elements are almost similar:
The equilibrium constant of a reaction → at 100°C is 50 if a one litre flask containing one mole of A2 is connected to a two litre flask containing two moles of B. How many moles of AB will be formed at 373 K.
The Rh—Rh bond order in [Rh(CO)(CS) (μ-Br)]2 is:
Number of correct statement(s) among following in reference to P4O10 is/are:
I. The structure of the P4O10 cage is reminiscent of adamantane with Td symmetry point group.
II. It is closely related to the corresponding anhydride of phosphorous acid, P4O6..
III. Phosphorus pentaoxide is a potent dehydrating agent as indicated by the exothermic nature of its hydrolysis.
IV. P4O10 is prepared by burning tetraphosphorus with sufficient supply of oxygen
Calculate the quantity of electricity that would be required to reduce 12.3 gm nitrobenzene to aniline, if the current efficiency for the process is 50%. How many Faradays will be required for complete conversion? (rounded up to first decimal place
The magnetic field (in Tesla) required for flipping a 1H nucleus in an NMR spectrometer operating at 400 MHz is ………………. (rounded up to two decimal place)
When 0.045 mole of NaOH was added to one litre of buffer solution, its pH changes from 5.72 to 5.92. Calculate buffer index (rounded up to three decimal places):
Number of isoprene units present in lupeol is:
The wave function of a particle confined in a box of length a is
Find probability of finding the particle at x = a (rounded up to two decimal place):
The total number of reactions which show the formation of benzyl chloride?
A cylinder containing cooking gas can withstand a pressure of 14.9 atm. The pressure gauge of cylinder indicates 12 atm at 27OC. Due to sudden fire in the building, its temperature starts rising. At what temp. the cylinder will explode?
Calculate the sum of vibrational modes of energy for the electronically non-deficient gaseous hydrides of elements of second period.
How much heat is required to change 10 g ice at 0°C to steam at 100°C? Heat of fusion and heat of vaporization for H2O are 80 cal/gm and 540 cal/gm respectively. Sp. heat of water is 1 cal/g. (in cal.)
The standard reduction potential of Cu2+/Cu is 0.34 V. If Ksp of Cu(OH)2 is 1.0 × 10–18. Calculate the reduction potential (in Volt) at pH = 10?
The dipole moment of KCl is 3.336 × 10-29 coulomb meter. The inter-atomic distance is 260 pm. Calculate %-ionic character of KCl if there were opposite charges of fundamental unit located at each nucleus.
How many number of compound having IR – stretching frequency higher than 1720:
Number of reagents which correctly match in the reference to reaction on double bonds:
i) CH2I2/ Zn-Cu 4
(ii) mCPBA (Peroxy acid) 2
(iii) (PPh3)3RhCl/H2 3
(iv) H2O2 / NaOH/H2O 1
(v) O3/Zn/H2O 4
(vi) Na/Liq.NH3/EtOH 2
Number of correct statement/s about given reaction is/are:
Jmax for a rigid diatomic molecule is 3 at 300 K. Calculate the value of rotational constant (in cm-1, rounded up to first decimal place):
What is the oxidation number of lead in litharge?
The specific conductivity of a saturated solution of AgCl is 3.40 × 10–6 ohm–1 cm–1 at 25°C. If , the solubility of AgCl at 25°C is X × 10–5, then what is the value of X?
(rounded up to first decimal place)