CBSE
Multiple Choice Questions2.5 g of the carbonate of a metal was treated with 100 mL of 1N H2SO4. After the completion of the reaction, the solution was boiled off to expel CO2 and was then titrated against 1N NaOH solution. The volume of alkali that would be consumed, if the equivalent weight of the metal is 20
50
25
75
100
When 25 g of Na2SO4 is dissolved in 10 kg of solution, its concentration will be
2.5 ppm
25 ppm
250 ppm
100 ppm
Percentage of Se (at. mass= 78.4) in peroxidase anhydrase enzyme is 0.5% by weight, then minimum molecular mass ofperoxidase anhydrase enzyme is
1.576 x 104
1.576 X 103
15.76
2.136 X 104.
Assertion : The molality of the solution does not change with change in tempe-rature.
Reason : The molality is expressed in units of moles per 1000 g of solvent.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Stomach acid, a dilute solution of HCl in water,can be neutralized by reaction with sodium hydrogen carbonate,
How many milliliters of 0.125 M NaHCO2 solution are needed to neutralize 18.0 mL of 0. 100 M HCl?
14.4 ml
12.0 mL
14.0 mL
13.2 ml
The volume of 10N and 4N HCl required to make 1 L of 7N HCl are :
0.50 L of 10N HCl and 0.50 L of 4N HCl
0.60 L of 10N HCl and 0.40 L of 4N HCl
0.80 L of 10N HCl and 0.20 L of 4N HCl
0.75 L of 10N HCl and 0.25 L of 4N HCl
What is the molarity of H2SO4 solution that has a density of 1.84 g/cc at 35C and contains 98% by weight?
4.18 M
8.14 M
18.4 M
18 M
Assertion : S. l. unit of atomic mass and molecular mass is kilograms.
Reason : Atomic mass is equal to the mass of 6.023x 1024atoms.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Hydroxyl ion concentration of 10-2 M HCl is :
1 x 101 mol dm-3
1 x 10-12 mol dm-3
1 x 10-1 mol dm-3
1 x 10-14 mol dm-3
If the Vrms is 30 R1/2 at 27oC then calculate the molar mass of gas in kilogram .
1 Kg
2 Kg
0.001 Kg
0.002 Kg
