Chemistry Question Bank

What quantity of limestone \(\mathrm{CaCO_3}\) on heating will give 56 Kg of CaO?

The chloride of a metal contains 71% chlorine by weight and the vapour density of it is 50. The atomic weight of the metal will be

The hydrated salt \(\mathrm{Na_2SO_410H_2O}\) undergoes X% loss in weight on heating and becomes anhydrous. The value of X will be

The simplest formula of a compound containing 50% by mass of element X (at. wt. 10) and 50% by mass of element Y (at. wt. 20) is ;

The total number of protons in 8.4 g of \(\mathrm{MgCO_3}\) is (NA = 6.021023) :

A person adds 3.42 of sucrose \(\mathrm{C_12H_22O_11}\) in his cup of tea to sweeten it. How many atoms of carbon does he add?

The number of water molecules present in a drop of water weighing 0.018 g is

The number of molecules of water in 333 g of \(\mathrm{Al_2SO_4H_2O}\) is

The no. of silver atoms present in a 90% pure silver wire weighing 10 g. is (at.wt. of Ag=108)

How many molecules of \(\mathrm{H_2O}\) are contained in 2.48 g of \(\mathrm{Na_2S_2O_3H_2O}\) (at.wt. of Na=23,S=32)

How many electrons are present in 180 gm. of water

The largest no. of molecules is in

The mass of carbon present in 0.5 moles of \(\mathrm{K_4FeCN}\) is

The no. of electrons in 2 gm ion of nitrate ion \(\mathrm{NO_3}\) is

The no. of atoms in 52 a.m.u. of He is

Which one of the following samples contains the largest number of atoms.

Which of the following has the highest mass

The molecular wt. of green vitriol is \(\mathrm{M_0}\) The wt. of 103 NA molecules of it is

In which of the following pairs both members have same no. of atoms

Total no. of protons in 36 ml of water at 4°C (where of water = 1 g/ml) is

3 mol of ammonia contains:

Choose the wrong statement:-

The number of moles of \(\mathrm{H_2}\) in 0.224 litre of hydrogen gas at NTP is:

19.7 kg of gold was recovered from a smuggler. The atoms of gold recovered are: (Au = 197)

At NTP 1.0 g of hydrogen gas has volume in litre: