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Questions >> JEEMAIN and NEET >> Chemistry

Chemistry

The formula weight of an acid is 82.0. $100cm^3$ of a solution of this acid containing 39.0g of the acid per litre were completely neutralized by $95.0cm^3$ of aqueous NaOH containing 40.0g of NaOH per litre.What is the basicity of the acid?

asked Oct 31, 2013 by sreemathi.v

1 answer

Calculate the normality of the resulting solution made by adding 2drops(0.1ml) of 0.1N $H_2SO_4$ in 1litre of distilled water.

asked Oct 31, 2013 by sreemathi.v

1 answer

What is the strength in g per litre of a solution $H_2SO_4$ ,12ml of which neutralized 15ml of W/10 of NaOH solution?

asked Oct 31, 2013 by sreemathi.v

1 answer

How many milliliter of 0.5M $H_2SO_4$ are needed to dissolve 0.5g of copper II carbonate?

asked Oct 31, 2013 by sreemathi.v

1 answer

Calculate the weight of iron which will be converted into its oxide by the action of 18g of steam

asked Oct 31, 2013 by sreemathi.v

1 answer

$Mg(OH)_2$ in the form of milk of magnesia is used to neutralize excess stomach acid .How many moles of stomach acid can be neutralized by 1g of $Mg(OH)_2$ ? (Molar mass of $Mg(OH)_2=58.33)$

asked Oct 30, 2013 by sreemathi.v

1 answer

Calculate the number of atoms of oxygen present in 88g $CO_2$ .What would be the weight of CO having the same no of oxygen atoms ?

asked Oct 30, 2013 by sreemathi.v

1 answer

$5ml$ of a gaseous hydrocarbon was exposed to $30ml$ of $O_2$ .The resultant gas,on cooling is found to measure $25\;ml$ of which $10\;ml$ are obsorbed by NaOH and the remainder by pyrogallol.Determine molecular formula of hydrocarbons .All measurement are made at constant pressure and temperature.

asked Oct 30, 2013 by sreemathi.v

1 answer

Calculate number of oxalic acid molecules in 100ml of 0.02N oxalic acid

asked Oct 30, 2013 by sreemathi.v

1 answer

Calculate molecules of methane,C and H atoms in 25g methane

asked Oct 30, 2013 by sreemathi.v

1 answer

The vapour density of a mixture containing $NO_2$ and $N_2O_4$ is 38.3 at $27^{\large\circ}C$ .Calculate the mole of $NO_2$ in 100g mixture

asked Oct 30, 2013 by sreemathi.v

1 answer

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

The molality of 1 litre solution with $X\%$ by weight $H_2SO_4$ is equal to 9.The weight of the solvent present in the solution is 910g.The value of $X$ :

asked Oct 29, 2013 by sreemathi.v

1 answer

If sea water contains 63ppm $NO_3^{-1}$ and its density is 1.01g/ml,the approximate molarity of sea water is

asked Oct 28, 2013 by sreemathi.v

1 answer

The molality of 1M solution of NaCl (specific gravity $1.0585g/ml$ ) is :

asked Oct 28, 2013 by sreemathi.v

1 answer

The amount of $H_2SO_4$ present in 1200ml of 0.1m solution is

asked Oct 28, 2013 by sreemathi.v

1 answer

Consider the following reaction: $2NH_3(g)+CO_2(g)\rightarrow (NH_2)_2CO(aq)+H_2O(l)$ . If $637.2\;g$ $NH_3$ and $1142\;g$ $CO_2$ are allowed to react, then which one is the limiting reagent ?

asked Oct 28, 2013 by sreemathi.v

1 answer

Total number of atoms present in $1.0cm^3$ of solid urea (density 0.3g/ $cm^3$ ) at $25^{\large\circ}$ are

asked Oct 28, 2013 by sreemathi.v

1 answer

If molecular weight of glucose-1-phosphate is 260 and its density is 1.5g $cm^{-3}$ ,what is the average volume occupied by 1 molecule of this compound ?

asked Oct 28, 2013 by sreemathi.v

1 answer

A gaseous alkane was exploded with oxygen.The volume of $O_2$ for complete combustion to $CO_2$ formed was in the ratio of 7 : 4.The molecular formula of alkane is

asked Oct 28, 2013 by sreemathi.v

1 answer

Amount of oxygen required for combustion of 1kg of a mixture of butane and isobutane is

asked Oct 28, 2013 by sreemathi.v

1 answer

To neutralize completely 20ml of 0.1m aqueous solution of phosphorus $(H_3PO_3)$ acid the volume of 0.1m aqueous KOH solution required is

asked Oct 28, 2013 by sreemathi.v

1 answer

$6.02\times 10^{20}$ molecules of urea are present in 100ml solution.The concentration of urea solution is

asked Oct 28, 2013 by sreemathi.v

1 answer

25ml of a solution of barium hydroxide titration with 0.1molar solution of hydro-chloric acid gave a titre value of 35ml.The molarity of barium hydroxide is

asked Oct 28, 2013 by sreemathi.v

1 answer

What volume of hydrogen gas at 273K and 1atm pressure will be consumed in obtaining 21.6g of element boron (at.mass=0.8) from the reduction of boron trichloride with hydrogen ?

asked Oct 28, 2013 by sreemathi.v

1 answer

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