The equation that represents the water-gas shift reaction is:
Solution: (1) Water-gas shift reaction: CO(g) + H2O –> CO2(g) + H2(g)
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A diatomic molecule X2 has a body-centred cubic
A diatomic molecule X2 has a body-centred cubic (bcc) structure with a cell edge of 300 pm. The density of... View Article
The structure of PCl5 in the solid state is
1) Square planar [PCl4]+ and octahedral [PCl6]– 2) Tetrahedral [PCl4]+ and octahedral [PCl6]– 3) Trigonal bipyramidal 4) Square pyramidal Solution:... View Article
Which of the following derivatives of alcohols is unstable in an aqueous base?
Solution: (1) Hydrolysis of ester occurs in basic medium.
Which of the following is not an essential amino acid?
1) Valine 2) Tyrosine 3) Lysine 4) Leucine Solution : (2) Tyrosine in not an essential amino acid. Hence option... View Article
The most appropriate reagent for conversion of C2H5CN into CH3CH2CH2NH2 is
1) NaBH4 2) Na(CN)BH3 3) CaH2 4) LiAlH4 Solution: LiAlH4 is the answer.
The potential energy curve for the H2 molecule
The potential energy curve for the H2 molecule as a function of internuclear distance is: Solution: (2)
The number of chiral carbons present in sucrose is
Answer: (9) The number of chiral carbons present in sucrose is 9.
For a dimerization reaction
For a dimerization reaction 2A(g) –> A2(g) at 298 K, ∆U– = -20KJ mol-1, ∆S– = 30KJ mol-1, then the... View Article
Considering that ∆0 > P, the magnetic moment (in BM) of [Ru(H2O)6] 2+ would be
Solution: [Ru(H2O)6)2+ Ru 2+ = 3d6(∆0 > P) = t2g6 eg0 n = 0, u = 0
The volume, in mL, of 0.02 M K2Cr2O7 solution required to react with 0.288 g of ferrous oxalate in acidic medium is ________. (Molar mass of Fe= 56 g mol–1)
Answer: (50 ml) K2Cr2O7+ FeC2O4 → Cr3+ + Fe3+ + CO2 \(\begin{array}{l}\frac{0.02\times vol\times 6}{1000}=3 \times \frac{0.288}{144}\times 100\end{array} \) Vol. =... View Article
For a reaction [latex]X + Yrightleftharpoons 2Z[/latex] , 1.0 mol of X, 1.5 mol of Y and 0.5 mol of Z were taken in a 1 L vessel and allowed to react.
For a reaction \(\begin{array}{l}X+Y\rightleftharpoons 2Z\end{array} \), 1.0 mol of X, 1.5 mol of Y and 0.5 mol of Z were... View Article
The one that is NOT suitable for the removal of permanent hardness of water is:
1) Ion-exchange method 2) Calgon’s method 3) Treatment with sodium carbonate 4) Clark’s method Answer: (4) Clark’s method is used... View Article
The increasing order of boiling points
The increasing order of boiling points of the following compounds is: 1) I < III < IV < II 2)... View Article
The correct order of the ionic radii of O2–, N 3–, F–, Mg2+, Na+ and Al3+ is:
1) N3– < O2– < F– < Na+ < Mg2+ < Al3+ 2) N3– < F– < O2– < Mg2+... View Article
An element crystallises in a face-centred cubic (fcc) unit cell with cell edge a. The distance between the centres of two nearest octahedral voids in the crystal lattice is:
1) a 2) a/2 3) √2a 4) a/√2 Answer: (4) Nearest octahedral voids One along edge center & other at... View Article
Consider the complex ions, trans-[Co(en)2Cl2]+ (A) and cis-[Co(en)2Cl2]+ (B). The correct statement regarding them is
1) Both (A) and (B) can be optically active. 2) (A) can be optically active, but (B) cannot be optically... View Article
Which one of the following polymers is not obtained by condensation polymerisation?
1) Bakelite 2) Nylon 6 3) Buna-N 4) Nylon 6, 6 Solution: Option 3 is the answer.
Reaction of ammonia with excess Cl2 gives:
Reaction of ammonia with excess Cl2 gives: 1) NH4Cl and N2 2) NH4Cl and HCl 3) NCl3 and HCl 4)... View Article
Lattice enthalpy and enthalpy of solution of NaCl are 788 kJ mol–1, and 4 kJ mol–1, respectively. The hydration enthalpy of NaCl is
1) –780kJ mol–1 2) 784kJ mol–1 3) –784kJ mol–1 4) 780kJ mol–1 Answer: (3) ΔHsol=L.E + ΔHhyd 4 = 788... View Article
