Chemistry Question Bank

In which of the following pairs do 1 g of each have an equal number of molecules?

The volume of 3M HCl required to completely react with 1.431g of sodium carbonate

How many grams are contained in 1 g atom of Nitrogen

Ratio of carbon to hydrogen atom is maximum in:

Which of the following has the highest mass:

Weight ratio of Fe:C in \(\mathrm{Fe_2FeCN}\) is:

One atom of an element weighs 3.981023g. Its atomic mass is

In what volume ratio a 0.36 M solution should be mixed with another 0.15 M solution to obtain a 0.24 M solution?

A mixture contains and . If both and provide equal number of sulphate ions then, the ratio of and ions in mixture is

25.4 g of iodine and 14.2g of chlorine are made to react completely to yield a mixture of ICl and \(\mathrm{ICl_3}\) Calcualte the ratio of moles of ICl and \(\mathrm{ICl_3}\)

If 224 ml of a triatomic gas has a mass of 1 g at 273 K and 1 atm pressure, then the mass of one atom is

A certain compound has the molecular formula \(\mathrm{X_4O_6}\) if 10 g of \(\mathrm{X_4O_6}\) has 5.72 g of X, atomic mass of X is :

On reduction with hydrogen, 3.6 g of an oxide of metal left 3.2 g of the metal. If the atomic weight of the metal is 64, the simplest formula of the oxide would be

Two flasks of equal volumes are evacuated, then one is filled with gas A and other with gas B at the same temperature and pressure. The weight of B was found to be 0.80 gm while the weight of gas A is found to be 1.40…

\(\mathrm{N_2}\) and \(\mathrm{H_2}\) are mixed in 14:3 mass ratio. After certain time ammonia was found to be 40% by mol. The mole fraction of \(\mathrm{N_2}\) at that time in the mixture of \(\mathrm{N_2}\) \(\mathr…

Hydrogen evolved at NTP on complete reaction of 27 gm of Al with excess of aq NaOH would be (Chemical reaction: 2Al + 2NaOH + \(\mathrm{H_2O}\) \(\mathrm{NaAlO_2}\) + \(\mathrm{H_2}\)

An ore contains 1.34% of the mineral argentite, \(\mathrm{Ag_2S}\) by weight. How many grams of this ore would have to be processed in order to obtain 1.00 g of pure solid silver, Ag?

The number of electron in the telluride ion. \(\mathrm{Te_2}\) is

What is the total number of atoms present in 25.0 mg of camphor \(\mathrm{C_10H_16O}\)

Chlorophyll contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 3.00 gms of chlorophyll.

At room temperature and pressure two flask of equal volumes are filled with \(\mathrm{H_2}\) and \(\mathrm{SO_2}\) respectively. Particles which are equal in number in two flasks are

Simplest formulae of a compound containing 20% of element X (atomic weight 10) and 80% of element Y (atomic weight 20) is

Which of the following samples contains 2.0 1023 atoms?

A copper sulphate solution contains 1.595% of \(\mathrm{CuSO_4}\) by weight. Its density is 1.2 g / ml, Its molarity will be

6.023 ×1023 molecules of Ca (OH)₂ react with 3.01×1022 molecules of HCl, number of moles of \(\mathrm{CaCl_2}\) obtained are