Archives

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 Vol. = 200/4 = 50 ml ... 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 , 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. At equilibrium, the concentration... 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... 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) IV < I < II < III 3) I <... View Article

The correct order of the ionic radii of O^2–, N ^3–, F^–, Mg²⁺, Na⁺ and Al³⁺ is:

1) N3– < O2– < F– < Na+ < Mg2+ < Al3+ 2) N3– < F– < O2– < Mg2+ < Na+ < Al3+... 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 Body centre... 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 active. 3) Both (A) and (B) cannot be... 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.... View Article

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) NCl3 and NH4Cl Solution: Hence option 3 is... 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... View Article

The final major product of the following reaction is:

The final major product of the following reaction is: Answer: (3) Hence option 3 is the answer.... View Article

The variation of molar conductivity with concentration of an electrolyte (X) in aqueous solution is shown in the given figure. The electrolyte X is:

1) HCl 2) CH3COOH 3) NaCl 4) KNO3 Answer: (2) Such type of variation is always for weak electrolyte. Hence Ans. (2) CH3COOH... 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

Archives

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)

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.

The one that is NOT suitable for the removal of permanent hardness of water is:

The increasing order of boiling points

The correct order of the ionic radii of O^2–, N ^3–, F^–, Mg²⁺, Na⁺ and Al³⁺ is:

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:

Consider the complex ions, trans-[Co(en)₂Cl₂]⁺ (A) and cis-[Co(en)₂Cl₂]⁺ (B). The correct statement regarding them is

Which one of the following polymers is not obtained by condensation polymerisation?

Reaction of ammonia with excess Cl₂ gives:

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

The final major product of the following reaction is:

The variation of molar conductivity with concentration of an electrolyte (X) in aqueous solution is shown in the given figure. The electrolyte X is:

The rate constant (k) of a reaction is measured at different temperatures

The correct statement about probability density (except at infinite distance from nucleus) is :

The compound that has the largest H–M–H bond angle (M=N, O, S, C) is:

Adsorption of a gas follows Freundlich adsorption isotherm

Among the following compounds, geometrical isomerism

The following molecule acts as an:

Boron and silicon of very high purity can be obtained through:

Hydrogen peroxide, in the pure state, is: