Recent questions in Some Basic concepts in Chemistry

A plant virus is found to consist of uniform cylindrical particles of 150A in diameter and 5000A long.The specific volume of the virus is $0.75cm^3/g$ .If the virus is considered to be a single particle and its molecular weight

asked Oct 30, 2013 by sreemathi.v

1 answer

Find the number of g-molecules of oxygen in $6.023\times 10^{24}$ CO molecules

asked Oct 30, 2013 by sreemathi.v

1 answer

Calculate the mass of $CaO$ that shall be obtained by heating 20 kg of 80 % pure lime-stone $(CaCO_3)$

asked Oct 30, 2013 by sreemathi.v

1 answer

$H_2O_2$ is marked 22.4 volume.How much of it is required to oxidize 3.5g $H_2S$ gas ?

asked Oct 30, 2013 by sreemathi.v

1 answer

How many moles of electron weigh one kilogram ?

asked Oct 30, 2013 by sreemathi.v

1 answer

The density (in $gml^{-1})$ of a 3.60M sulphuric acid solution that is 29% $H_2SO_4$ (Molar mass= $98gmol^{-1})$ by mass will be :

asked Oct 30, 2013 by sreemathi.v

1 answer

In the reaction $2Al(s)+6HCl(aq)\rightarrow 2Al^{3+}(aq)+6Cl^{-1}(aq)+3H_2(g)$

asked Oct 30, 2013 by sreemathi.v

1 answer

Density of a 2.05M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is

asked Oct 30, 2013 by sreemathi.v

1 answer

How many EDTA (ethylene diamine tetracetic acid)molecules are required to make an octahedral complex with a $Ca^{2+}$ ion ?

asked Oct 30, 2013 by sreemathi.v

2 answers

How many moles of magnesium phosphate $Mg(PO_4)_2$ will contain 0.25 mole of oxygen atom ?

asked Oct 30, 2013 by sreemathi.v

1 answer

If $\large\frac{1}{6}$ , in place of $\large\frac{1}{12}$ mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will :

asked Oct 30, 2013 by sreemathi.v

1 answer

Two solution of a substance (non-electrolyte) are mixed in the following manner,480ml of 0.5M of first solution with 520 ml of 1.2m of second solution.The molarity of final solution is

asked Oct 29, 2013 by sreemathi.v

1 answer

$3.92g$ of ferrous ammonium sulphate crystals are dissolved in 100ml of water.20ml of this solution requires 18ml of potassium permanganate during titration for complete oxidation .The weight of $KMnO_4$ present in one litre of the solution is

asked Oct 29, 2013 by sreemathi.v

1 answer

$8g$ of sulphur are burnt to form $SO_2$ ,which is oxidized by $Cl_2$ .The solution is treated with $BaC_2$ solution.The amount of $BaSO_4$ percipitated is

asked Oct 29, 2013 by sreemathi.v

1 answer

Consider the decomposition reaction of nitroglycerine $4C_3H_5N_3O_9\rightarrow 6N_2+12CO_2+10H_2O+O_2$ . If $200g$ nitroglycerine gives 6.55g $O_2$ , then percent yield of the reaction is

asked Oct 29, 2013 by sreemathi.v

1 answer

$100\;mL$ of a mixture of $NaOH$ and $Na_2SO_4$ is neutralized by $10\;mL$ of $0.5\;M$ $H_2SO_4$ . Hence $NaOH$ in $100\;mL$ solution is

asked Oct 29, 2013 by sreemathi.v

1 answer

Volume of 2m HCl required to neutralize the solution containing 1 mole of $NH_4Cl$ and $1$ mole of NaOH is

asked Oct 29, 2013 by sreemathi.v

1 answer

Mole fraction of $I_2$ in $C_6H_6$ is 0.2.The molality of $I_2$ in $C_6H_6$ is

asked Oct 29, 2013 by sreemathi.v

1 answer

The mole fraction of the solute in one molar aqueous solution is

asked Oct 29, 2013 by sreemathi.v

1 answer

3.0mole NaOH solution has a density of 1.110g/ml.The molarity of the solution is

asked Oct 29, 2013 by sreemathi.v

1 answer

Molarity of $H_2SO_4$ (density 1.8g/ml) is 18m.The molality of this $H_2SO_4$ is

asked Oct 29, 2013 by sreemathi.v

1 answer

If $30ml$ of $H_2$ and $20ml$ of $O_2$ react to form water,what is left at the end of the reaction

asked Oct 29, 2013 by sreemathi.v

1 answer

The dehydration yield of cyclohexanol to cyclohexene is 75%.What would be the yield if 100g of cyclohexanol is dehydrated?

asked Oct 29, 2013 by sreemathi.v

1 answer

The no of moles of $KMnO_4$ that will be needed to react with one mole of sulphite ion in acidic solution

asked Oct 29, 2013 by sreemathi.v

1 answer

A solution is 0.5m in $MgSO_4$ ,0.1M $Alcl_3$ and 0.2M in $(NH_4)_2SO_4.$ The total ionic strength is

asked Oct 29, 2013 by sreemathi.v

1 answer

The total ionic strength (total molarity of all ions) Containing 0.1m of $CuSO_4$ and 0.1m of $Al_2(SO_4)_3$ is

asked Oct 29, 2013 by sreemathi.v

1 answer