LMS

Which one of the following is not a molecular ion

One mole of Hydrogen and oxygen have same at STP

Which one is a molecular ion  

The number of moles of CO2 which contains 16g of oxygen 

The weight of 11.2 dm3 of CO2 at STP would be

2.8 g of an unknown gas occupies 2.24 dm3 volume at standard temperature and pressure. The gas may be

1 g. atom of nitrogen at STP represents

Which of the following will weigh more

The weight of 5.6 dm3 of NH3 at STP would be

What volume is occupied by a mixture of 0.5g H2, 16g O2 and 7.0g N2  

Avogadro’s number is the number of molecules present in

The molar volume of a gas depends upon its

The number of atoms in 16g Ozone is approximately

Which of the following are limitations of chemical equations 

Which statement is absolutely correct about the balanced chemical equation i.e it contains equal

Which one act as a limiting reactant when 6g of carbon and 16 g of oxygen react to produce CO2

A sample of CaCO3 has Ca = 40% C = 12% and O = 48%. If the law of constant proportions is true, then the mass of Ca in 5g of CaCO3 will be

In the reaction 4NH3(g) + 5O2(g) 4NO(g) + 6H2O when one mole of ammonia and 1-mole of O2 are made to react to completion, then  

How many moles of potassium chlorate should be decomposed completely to obtain 67.2 dm3 of oxygen at STP?          2KClO32KCl + 3O2  

Find the mass of iron which will be converted into its oxide by the action of 18g of steam as   

The law of conservation of mass and the law of definite proportions are obeyed while doing calculation of

For stoichiometry calculations, we have to assume

21g of CaO is obtained by roasting 50g CaCO3. What is the percentage yield of CaO? 

For stoichiometry calculations, we have to assume

The study of quantitative relationship between reactants and products in a balanced chemical equation is known as 

4.4 g of an unknown gas occupies 2.24 dm3 volume at standard temperature and pressure. The gas may be

The volume of NH3 obtained by the combination of 10 cm3 of N2 and 30 cm3 of H2 at S.T.P. is

CH2O is the empirical formula of

A compound with empirical formula CHO2 and molecular mass 90g / mole. The molecular formula of the compound is  

A compound contains 50% S and 50% O by mass. The empirical formula of compound is 

While determine molecular formula, the simple multiple ‘n’ is not unity for

CH2O is the empirical formula of

An acid with molecular mass 104 contain 34.6%C, 3.85% H and rest is O the molecular formula of acid is  

A compound used as artificial sweetener has formula 

A compound with empirical formula CHO2 and molecular mass 90g / mole. The molecular formula of a compound is  

The most abundant isotope of sulphur is

How many number of electrons are present in 4.2g of azide ion 

3.0 g of NO gas occupies volume

The number of relations used to determine number of moles of a substance may be  

1 mole of different gases have different  

What is the volume (in dm3) of CO2 liberated at STP, when 53gram of sodium carbonate (mol. mass = 106) is treated with excess dilute HCl in following reaction

The number of O-atoms in 45g of C6H12O6

One mole of which of the following will have different number of electrons than others 

One gram molecule of different gases have all the following properties same at STP except 

The total number of atoms in 9g of water are

Which of the following has same number of moles?

1 mole of CH3OH and C2H5OH have equal number

One mole of which of the following will have maximum number of electrons

A pair that have same number of particles

The total number of atoms in 9g of water are