Which of the following carbonates of alkali metals has least thermal stability?
For the following equilibrium, N2O4(g) → 2NO2(g) Kp is found to be equal to Kc. This is attained when:
Aluminium-25 decay by emitting a positron. The species immediately produced has:
The temperature coefficient of two reactions are 2 and 3 respectively. Which would be correct for these reactions?
Which of the following amino acid is hydrophobic?
Arrange the following in decreasing order of stretching frequency of C-O bond (cm–1):
(I) Mo(CO)3(NMe3)3 (II) Mo(CO)3[P(OPh)3]3
(III) Mo(CO)3(PMe3)3 (IV) Mo(CO)3(PCl3)3
Which of the following form stable for CN—CH2—CH2—CN?
Given Which of the following holds true?
By Cannizaro reaction A changes to B and C as given. Hence, A is:
Emf of Cd-cell is 1.018 V at 25°C. The temperature coefficient of cell is –5.2 × 10–5 VK–1. How cell temperature will change during operation?
Match the correctly:
(W) 12C O16 (k) 2160
(X) 13C O16 (l) 1830
(Y) 13C O17 (m) 1951
(Z) 12C O17 (n) 2106
Calculate En if represents state of a particle in 1-D box of length 1nm:
The given carbocation rearrangement into:
The self-ionization constant for pure formic, acid, has been estimated as 10–6 at room temperature. The density of formic acid is 1.15 g/cm3. The percentage of formic acid molecules in pure formic acid are converted to formate ion:
Products A and B are:
25 mL of hydrogen and 18 mL of Iodine when heated in closed container, produced 30.8 mL of HI at equilibrium. Calculate degree of dissociation of HI at same temperature:
For a surface inactive substance (excessive concentration of solute per unit area of surface) is essentially:
Which of the following does not show facial & meridonial isomerism?
The plane(s) which show allowed reflection in both bcc and fcc lattices is/are:
(I) 100 (II) 111 (III) 110
Consider μ1, μ2, μ3 are dipole moments of Pyrrole, Furan, Thiopene respectively. Which of the following holds true:
The product B is:
Which of the following conversion take place in bourdon tubes?
In bourdon tubes converts input pressure into displacement and displacement of the needle will be directly proportional to input pressure.
Which of the following is true about Osazone formation in carbohydrates?
If bond length of CO bond in carbon monoxide is 1.128 Å, then, what is the value of CO bond length in Fe(CO)5?
Consider borax. Chemical formula of which is Na2B4O7. 10H2O. Choose the incorrect statement:
Which of the following will give different product on hydrolysis (among others)?
1H NMR spectrum of a compound with molecular formula C4H9NO2 shows:
d 5.30 (broad, 1H); d 4.10 (q, 2H); d 2.80 (d, 3H); d 1.20 (t, 3H). The structure of compound that is consistence with the above data is:
How are the following compounds related?
If sin2q = 0.1198, 0.2395, 0.3588, 0.4793, 0.5984. Find lattice type:
Which of the following conversions is/are correctly presented?
Select the correct statement with respect to alkali metals.
Choose the correct statement/s:
Incorrect statement regarding above compounds:
(I) A and C are enantiomer (II) B and D are diastereomers
(III) C and D are enantiomers (IV) A and B are homomer
Choose the correct statement/s among following:
Select the correct statements.
Which statement is incorrect about the following reaction?
Which of the following is/are correct in reference to RNA?
Which of following conversions is/are correct in reference to peri-cyclic reactions?
Which of the following conversion is/are incorrectly presented?
What is the spin multiplicity of Fischer carbene?
How many signals are obtained for the following compound in 1H NMR spectroscopy?
M/O2 (where M = Metal center) binding ratio in Hemocyanin is:
Given is the ester hydrolysis reaction Order of reaction is __________?
The number of S–S bonds, in sulphur trioxide trimer (S3O9) is :
Number of 2c -2e- bonds in Al2(CH3)6 :
Root mean square velocity of H2 molecule having density 0.09 gL–1 at 1 atm is x × 103 ms-1 then what is the value of x? (rounded up to first decimal place)
100 ml of unknown reducing agent is reacted with 500 mL, 0.1 M excess I2 solution. If remaining I2 required 0.1 M, 200 mL Na2S2O3 solution for complete neutralization. Calculate normality of unknown reducing agent.
Consider the silicate Ba2NaxSi5O15. What is the value of ‘x’?
A sample of rock from moon contains equal number of atoms of uranium and lead. The age of the rock would be (in years, rounded up to first decimal place, in the multiple of 109) of the mineral. (Half-life of 238U is 4.5 × 109 years):
If one of the bonds in NH3 molecule has 22% s-character, how much percentage of it is expected to be present in lone pair? (rounded up to first decimal place)
Depression of freezing point of 0.01 molal aq. CH3COOH solution is 0.02046°. 1 molal urea solution freezes at – 1.86°C. Assuming molality equal to molarity, pH (rounded up to first decimal place) of CH3COOH solution is?
A solution made up to be 0.0100 M Co(NO3)2 and 0.0200 M N2H4 was found to have an equilibrium concentration of [Co2+] is 6 × 10–3 M. Assuming that the only complex formed was Co(N2H4)2+, what is the apparent Kf for complex formation? (rounded up to two decimal place)
Number of metal-metal bond in [Re2Cl4(PPhMe2)4] is?
The pKa values for the three ionizable groups, X, Y and Z of glutamic acid are 4.3, 9.7 and 2.2 respectively:
The isoelectric point for the amino acid is:
Find the value of lmax in (nm) in following compound.
Given: Base value of Heteroannular component = 214 nm
Homoannular component = 253 nm
Increment for each extra double bond = 30 nm
Exocyclic bond = 5 nm; Alkyl/Ring residues = 5 nm
How many of the following ores contain both iron & copper?
Cuprite, Chalcocite, Chalcopyrite, Malachite, Copper Glance.
What is the group number of the element having electronic configuration [Xe]4F145S2?
Among the following, the number of molecules that possess C2 axis of symmetry is ________:
BF3 ; BGCI3 ; 2,5 -dimethythiophene
Calculate the specific rotations (in 0°C) of the following sample taken at 25°C using the sodium D line. 1.00 g of sample is dissolved in 20.0 mL of ethanol. Then 5.00 mL of this solution is placed in a 20.0 cm polarimeter tube. The observed is 1.25° counterclockwise.