Explore topic-wise InterviewSolutions in .

20 gm sample containing Mg. is treated with excess of 2M HCl. As a result 11.2 litre of H_(2) gas at NTP was evolved. Find % purity of Mg in sample

2.0 g of sample containing Na_(2)CO_(3) and NaHCO_(3), loses 0.248 g when heated to 300^(@) C, the temperature of which NaHCO_(3) decomposes to Na_(2)CO_(3) and H_(2)O. What is % of Na_(2)CO_(3) in mixture?

2.0g of mixture of carconate , bicarbonate and chloride of sodium , on heating , produced 56 mL of CO_(2) at NTP . 1.6g of the same mixture required 25 mL of N HCl solution for neutralisation . Calculate the percentage ofNa_(2)CO_(3), NaHCO_(3) and NaCl in the mixture from the given data .

2.0 g of benzoic acid dissolved in 25.0 g of benzene shows a depression in freezing point equal to 1.62 K. Molal depression constant (K_(f)) of benzene is "4.9 K kg mol"^(-1). What is the percentage association of the acid if it forms dimer in the solution?

20 g of hydrogen is present in 5 litre vessel. The molar concentration of hydrogen is

20 g of hydrogen is present in 5 litre vessel, The molar concentration of hydrogen is :

20 g of a monobasic acid furnishes 0.5 moles of H_3O^(+) ions in its aqueous solution. The value of 1 g eq. of the acid will be

20 g of a substance in 2 litre of solution at 10^@C produces an osmotic pressure of 0.68 atm, the mol. wt. of solute is

20 g of a sample of Ba(OH)_(2) is dissolved in 50 ml. of 0.1 N HCl solution. The excess of HCl was titrated with 0.1 N NaOH. The volume of NaOH used was 20cc. Calculate the % Ba(OH)_(2) in the sample.

20 g of a non-volatile solute is added to 500 g of solvent. Freezing point of solvent = 5.48^(@)C and solution = 4.47^(@)C. K_(f)=1.93^(@)//m. Molecular mas of the solute is

20 g of a binary electrolyte (mol. Wt. = 100) are dissolved in 500 g of water. The freezing point of the solution is -0.74^@C, K = 1.86 k molality^-1. The degree of ionization of the electrolyte is:

2.0 g mixture of sodium carbonate and sodium bicarbonate on heating to constant mass gave 224mL of CO_(2), at NTP. The % mass of sodium bicarbonate in the mixture is:

20% first order reaction is completed in 50 minute. Time required for the completion of 60% of the reaction is

20 cm^(3)" so "SO_(2) diffuses through a porous plug in 60 sec. What volume of O_(2) will diffuse under similar conditions in 30 sec ?

20 cc of a hydrocarbon mixed with 66 cc of oxygen were exploded in a eudiometer tube. The residual gases after cooling occupied 56 cc. On treatment with KOH solution, the volume decreased to 16 cc. Find the formula of the hydrocarbon.

20 CC of hydro carbon were exploded with excess of oxygen. After explosion and cooling a contracting of was noted on addition of KOH another contraction of 40 CC was noted. The molecular formula of hydrocarbon is

20% aqueous FeCl_(3) solution has density of 1.1 gm/mL then molar concentration of this solution is ……….

2 SO_3 rarr 2SO_2 + O_2 is at equilibrium. The SO_2concentration is 0.6 M. Initial concentration of SO_3 is 1M. The equilibrium constant is:

2-propylbenzene on air oxidation and followed by decomposition by dilute acid gives

2-propanol when heated with copper at 570 k yields:

2-Propanol reacts with sulphuric acid at 170^(@)C, gives an alkene which reacts with bromine to give dibromoalkane. Alcoholic potassium hydroxide dehydrogenates the dibromo product to X. The structure of X is :

"2-propanol "+NaBr overset("Reflux")rarr X. What is X ?

2-Phenylethanol may be prepared by the reactionof phenylmagnesium bromide with

2-Phenylcycloprop-2-en-1-one is allowed to react with phenylmagnesium bromide and the reaction mixture is hydrolysed with perchloric acid.The product formed is

2-Phenylbutan-2-ol is best prepared by which of the following combinations?

2-Phenyl propene on acidic hydration gives ,

2-phenyl prop-1-ene on oxidation by ozone and followed by hydrolysis in the presence of zinc gives

2-phenyl ethyl chloride undergoes alkaline hydrolysis to give 2-phenyl ethanol with

2-Phenyl-2-hexanol can be prepared by Grignard synthesis The pair of compounds giving the desired product is

2-Phenyl butane on oxidation by KOH+KMnO_(4) gives

2-Pentanone can be differentiated from 3-Pentanone by_____.

2-Phentlethanol may be prepared by the reaction of phenylmagnesium chloride with

2-pentanone and 3-pentanone can be distinguished by one of the following:

2-pentanone and 3-pentanone are predominantly

2-pentanone and 3- pentanone are

2-Pentanone and 3-methylbutan-2-one are

2% of aqueous urea and 6% of aqueous 'X' are isotonic. If 'X' is a molecular solid, calculate its molar mass.

2-nitro 2 -methylpropaneon reductiongives

2- Nitrbutanceis heated with dilH_(2)SO_(4) gives

2 N HCl solution will have same molar conc. as a

2 moles of the same gas are enclosed in two containers A and B at 27^(@)C and at pressure 2 and 3 atms respectively. The rms velocity .

2 "mole" of PCl_(5) were heated in a closed vessel of 2 litre capacity. At equilibrium 40% of PCl_(5) dissociated into PCl_(3) and Cl_(2). The value of the equilibrium constant is:

2 moles of N_(2) O_(4 (g)) is kept in a closed container at 298 K and under 1 atm pressure . It is heated to 596 K when 20% by mass of N_(2) O_(4 (g)) decomposes to NO_(2) . The resulting pressure is

2 moles of helium gas expanded isothermally and irreversibly at 27^(@)C from volume 1 dm^(3) to 1 m^(3) at constant pressure of 100 kPa. Calculate the work done.

2 moles of H_(2)SO_(4) is kept in a beaker. Find (i) Moles of H-atoms (ii) Moles of S-atoms (iii) Moles of O-atoms (iv) Number of O-atoms

2 moles of H_2 at NTP occupy a volume of

2 moles of ann ideal gas at 27^(@)C are expanded reversibly from 2L to 20 L. find entropy change. (R=2 cal/mol K)