Archives

Assertion : Fluorine (F_(2)) is a stronger oxidising agent than chlorine. Reason : Fluorine is more electrongegative than chlorine.

Because fluorine is more electronegative than chlorine, it may more easily and strongly attract a shared pair of electrons.As a result, it... View Article

Assertion: Plaster of paris is stored in a moisture proof container. Reason: Plaster of paris set into a hard mass on wetting with water to form anhydrous calcium sulphate.

A and R are both right, and R is the correct explanation for A.Plaster of Paris is a quick-setting gypsum plaster made out of a fine white powder... View Article

Which of the following terms are unitless? (i) Molality (ii) Molarity (iii) Mole fraction (iv) Mass percent

(Mass of solute/Mass of solution) / 100 = mass percentThe Mole Fraction is the proportion of a component's moles to the total number of... View Article

Which of the following statements are correct for carbenes? only one unshared electron is present in each orbital, there is only one unpaired electron, hybridisation of c is sp3, all of the above.

only one unshared electron is present in each orbital, there is only one unpaired electron, hybridisation of c is sp3, all of the above.... View Article

when a gas is compressed keeping temperature constant it results in

Gas is compressed at a fixed temperature. According to Boyle's law, the volume in which gas is travelling decreases while pressure rises. There... View Article

what energy photon is necessary to raise an electron in hydrogen from the n = 1 to the n = 3 energy level?

Energy of nth excited state is En = − 13.6/n2 The energy absorbed is equal to the difference between these two energy levels, i.e. the energy... View Article

The correct order of strength of acidity of the following compounds is

Answer The presence of electron withdrawing groups, such as nitro, increases the acidic strength of phenol, whereas the presence of electron... View Article

If the distance between Na+ and Cl− ions in a sodium chloride crystal is X pm, the length of the edge of the unit cell is

Chloride ions at the corner and sodium ions at the edge centre touch each other in the fcc unit cell of NaCl along a specific edge.As a result,... View Article

The rate constant of a reaction depends on temperature, initial concentration of the reactants, time of reaction, extent of reaction

The rate constant of a reaction increases as the temperature rises, but it is unaffected by the initial concentration of reactants, reaction... View Article

Which of the ethers will produce methyl alcohol on treatment with hot concentrated HI?

When tert butyl methyl ether is treated with hot concentrated HI, it produces methyl alcohol. Tert butyl iodide is the other product.... View Article

Which of the following ions has the least flocculation value Cl−, SO2−4, PO3−4, [Fe(CN)6]4−

The higher the valence of the flocculating ion added, the more powerful it is in causing precipitation. This is referred to as the Hardy-Schulze... View Article

The correct order of the O−O bond length in O2,H2O2 and O3 is

The bond length of O−O in H2O2 is 147.5pm, in O3 is 128pm and in O2 it is 121pm, so the correct order is O2<O3<H2O2.... View Article

The hexaaquomanganese (II) ion contains five unpaired electrons while the hexacyano ion contains only one unpaired electron.

The electronic configuration of Mn(II) is 3d54s0. The ligand connected to the metal in the instance of hexaaquomanganese (II) ion is water, which... View Article

1ch4 4cl2 =ccl4 4hcl find equivalent mass

The number of g equivalent weight of CH4 is equal to the number of g equivalent weight of HCl, according to the law of equivalence. The law of... View Article

the electronic configuration of an element is [ne]3s2 3p3. what is the atomic number of the element which is just below the above element in the periodic table? *1 point

The element which present just below this element will have outermost electronic configuration as 4s24p3, so its full electronic configuration is... View Article

which of the following is most reactive towards hcn

Acetone Formaldehyde Acetaldehyde Diethyl Ketone Answer The addition reaction of hydrogen cyanide to create cyanohydrin is most... View Article

what is the weight of available oxygen from a solution of h2o2, if 20 ml of this solution needs 25 ml, N/20 kmno4 for complete oxidation?

Hydrogen peroxide reacts with potassium permanganate to get converted to oxygen as potassium permanganate is a very strong oxidizing agent that... View Article

the density of ethanol 60 y wiegth is 0.8937 g/ml what is mlarity

The weight percentage or %w/w represents the weight ratio of solute and the solution.Molarity = Moles of solute/Volume of solution(L) Formula for... View Article

How many of the following can react with bases? (1) Al2O3 (2) MgO (3) BeO (4) SeO2 (5) NO2 (6) PbO (7) As2O3

Answer: An amphoteric compound is a molecule or ion that can react both as an acid and as a base. Since water has the potential to act both as... View Article

for the elementary reaction, 2a b → products, the active mass of b is kept constant, and that of a is doubled. the rate of reaction will be

On doubling the active mass of A the rate of reaction increases 4 times. Rate = K[A]2[B]... 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