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The standard enthalpies of formation

The standard enthalpies of formation of Al2O3 and CaO are –1675 kJ mol–1 and –635 kJ mol–1 respectively. For the reaction... View Article

The oxygen dissolved in water exerts a partial pressure

The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above water. The molar solubility of oxygen in water is _____... View Article

The reaction of white phosphorus on boiling with alkali

The reaction of white phosphorus on boiling with alkali in an inert atmosphere resulted in the formation of product ‘A’. The reaction... View Article

15 mL of an aqueous solution of Fe²⁺in the acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr₂O₇^2-. The molarity of the Fe²⁺solution is _____× 10^–2M.(Round off to the Nearest Integer).

Answer: 24 By law of equivalence Meq of Fe2+ = Meq of Cr 2O72- M × 15 × 1 = 0.03 × 6 × 20 M = 0.24 M = 24 × 10–2 M... View Article

A certain orbital has n = 4 and m_l = –3. The number of radial nodes in this orbital is ____.(Round off to the Nearest Integer).

Answer: 0 Number of radial nodes = n – l– 1 n = 4, ml =–3 so l =3 radial nodes = 4 – 3 – 1 = 0... View Article

Which of the following compound CANNOT act as a Lewis base?

a. ClF3 b. PCl5 c. NF3 d. SF4 Answer: (b) NF3 has no vacant orbital neither in nitrogen nor in fluorine so it cannot accept the electron and... View Article

The product “A” in the above reaction is:

The product “A” in the above reaction is: Answer: (b) Hence the answer is b... View Article

Hoffmann bromamide degradation of benzamide gives product A, which upon heating with CHCl3 and NaOH gives product B. The structures of A and B are:

Hoffmann bromamide degradation of benzamide gives product A, which upon heating with CHCl3 and NaOH gives product B. The structures of A and B... View Article

With respect to drug-enzyme interaction, identify the wrong statement.

a. Allosteric inhibitor competes with the enzyme’s active site b. Competitive inhibitor binds to the enzyme’s active site... View Article

Which of the following is an aromatic compound?

Which of the following is an aromatic compound? Answer: (a) hence the answer is 6... View Article

Reducing smog is a mixture of:

a. Smoke, fog and N2O3 b. Smoke, fog and O3 c. Smoke, fog and SO2 d. Smoke, fog and CH2=CH–CHO Answer: (c) Reducing smog = smoke + fog + SO2... View Article

Which of the following reaction is an example of ammonolysis?

Which of the following reaction is an example of ammonolysis? a. C6H5CH2CN → C6H5CH2CH2NH2 b. C6H5COCl + C6H5NH2 → C6H5CONHC6H5 c. C6H5CH2Cl... View Article

The absolute value of the electron gain enthalpy of halogen satisfies:

a. I > Br >Cl> F b. F >Cl> Br > I c. Cl> F > Br > I d. Cl> Br > F > I Answer: (c) Chlorine has higher... View Article

A colloidal system consisting of a gas dispersed in a solid is called a/an:

a. Aerosol b. Solid Sol c. Foam d. Gel Answer: (b) Dispersed phase Dispersion medium Type of colloid Gas... View Article

The correct order of conductivity of ions in water is:

The correct order of conductivity of ions in water is: a. Cs+>Rb+> K+> Na+ b. K+> Na+> Cs+>Rb+ c. Rb+> Na+> K+>Li+... View Article

The reaction given below requires which of the following reaction conditions:

The reaction given below requires which of the following reaction conditions: a. 623 K, 300 atm b. 573 K, 300 atm c. 573 K, Cu, 300... View Article

The point of intersection and sudden increase in the slope, in the diagram given below respectively, indicates:

The point of intersection and sudden increase in the slope, in the diagram given below respectively, indicates: a. ΔG = 0 and melting... View Article

Product A in the below chemical reaction is:

Product “A” in the below chemical reaction is: Answer: (d) hence the answer is d... View Article

A central atom in a molecule has two lone pairs of electrons

A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is: a. Trigonal pyramidal... View Article

What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in its aqueous solution?

What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in its aqueous solution? a. 5.92 b. 5.26 c.... View Article

M	T	W	T	F	S	S
			1	2	3	4
5	6	7	8	9	10	11
12	13	14	15	16	17	18
19	20	21	22	23	24	25
26	27	28	29	30	31