Mass of 1 atom of Hydrogen is
Which of the following contains the largest number of atoms -
Four containers of 2L capacity contains dinitrogen as described below. Which one contains maximum number of molecules under similar conditions.
What is correct for 10 g of CaCO3 -
The total number of electrons present in 18 mL water (density 1 g/mL) is -
4.0 g of caustic soda (mol mass 40) contains same number of sodium ions as are present in-
One atom of an element ‘X’ weighs 6.664 × 10–23 gm. The number of gram atoms in 40 kg of it is -
The number of oxygen atoms present in 14.6 g of magnesium bicarbonate [Mg(HCO3 ) 2 ] is
One mole of P4 molecules contains -
he total number of protons , electrons and neutrons in 12gm of 6C12 is
The number of sodium atoms in 2 moles of sodium ferrocyanide Na4 [Fe(CN)6 ], is-
Out of 1.0 g dioxygen, 1.0 g (atomic) oxygen and 1.0 g of ozone, the maximum number of oxygen atoms are contained in -
Number of Ca+2 and Cl– ion in 111 g of anhydrous CaCl2 are -
2 moles of H2 at NTP occupy a volume of
4.48 litres of methane at N.T.P. correspond to-
The weight of a substance that displaces 22.4 litre air at NTP is -
Mol. wt. = vapour density × 2, is valid for -
5.6 litre of a gas at N.T.P. weighs equal to 8 gm the vapour density of gas is -
The maximum volume at N.T.P. is occupied by-
Equal masses of O2 , H2 and CH4 are taken in a container. The respective mole ratio of these gases in container is -
Number of moles of water in 488 gm of BaCl2 .2H2O are - (Ba = 137)
16 gm of SOx occupies 5.6 litre at STP. Assuming ideal gas nature, the value of x is -
The percentage of nitrogen in urea is about
The mass of carbon present in 0.5 mole of K4 [Fe(CN)6 ] is -
1.2 gm of Mg (At. mass 24) will produce MgO equal to -
Insulin contains 3.4% sulphur by mass. What will be the minimum molecular weight of insulin -
The percent of N in 66% pure (NH4 ) 2 SO4 sample is -
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 -