LMS

Which one is incorrect relation at STP 

Avogadro’s number is the number of molecules present in

The volume of oxygen gas is 1.12dm3 at STP , the mass of oxygen approximately is 

The number of ions present in 111g of CaCl2 , when fully dissociated in aqueous solution will be  

The total number of atoms in 10 g of calcium carbonate is (NA = 6.02 × 1023) 

Volume occupied by 7g of N2  present in a mixture

2.24 dm3 of CO2 gas at S.T.P has mass

Which one of the following is correct formula to find number of molecules 

Which of the following term is not used for ionic compounds?

Which is correct statement 

Elemental analysis is performed to determine 

There are different steps in determining the empirical formulaStep I. Calculating the number of gram atom Step II. Determining the atomic ratioStep III. Determining the percentage compositionWhat is the correct sequence of the above steps?

The value of “n” in determining molecular formula is obtained from the relation 

The simplest formula of a compound containing 50% of element X (At.wt = 10) and 50% of element Y (At. wt = 20) is

An unknown compound has empirical formula CH3O. Its molar mass is 62g/mole. The compound may be (write formulas)

An acid with molecular mass 104 contains 34.6%C, 3.85% H and rest is O. The molecular formula of acid is  

The simplest formula of a compound containing 50% of element X (At.wt = 10) and 50% of element Y (At. wt = 20) is

An unknown compound has empirical formula CH3O. Its molar mass is 62g/mole. The compound may be 

When 0.1 kg of CaCO3 is decomposed the CO2 produced occupies a volume at STP

Stoichiometric calculation assume that 

A limiting reactant is one which 

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

If a sample of ammonium phosphate, (NH4)3PO4 contains 6 moles of hydrogen atoms. Then number of moles of oxygen atoms in the sample is

A chemist is more interested about _______ to express the efficiency of a chemical process

“X” gram of calcium carbonate was completely burnt in air as  . The weight of solid residue formed is 14g. What is value of “X” in grams 

Balance chemical equation tells us about 

The relation which works best in stoichiometry

The yield which reflects the efficiency of a reaction

How many moles of neutron are present in one mole of heavy water?

79g of KMnO4 contains how many moles of oxygen atoms

Which of the following can be used to form a molecular ion 

Haemoglobin molecule is _________ times then heavier H2

The formation of which ion is exothermic

Haemoglobin molecule is times heavier than He

An elementary particle is 

CN-1 is iso-electronic with

Boron has two stable isotopes, 10B (19%) and 11B (81%) Find the average atomic mass of Boron

Bromine has two isotopes having relative abundance as and the average atomic mass of bromine is about 

In nature the ratio of relative percentage abundance of the isotopes 35Cl and 37Cl is_______ respectively

Two or more atoms having same atomic masses but different atomic number are called 

18.0g of glucose contains number of hydrogen atoms 

Which one has maximum number of atoms

Which of the following contains same number of atoms as 6g of Magnesium?

The number of hydrogen atoms in 36 g of NH4+1 is approximately 

Maximum number of molecules will be in 

How many moles of neutron are present in one mole of heavy water

3.01×1023 molecules of CO2 are added into 22g of CO2 at STP. The total moles of CO2 become  

500 ml of NH3 contains 6.00 × 1023 molecules at S.T.P. How many molecules are present in 100 ml of CO2 at S.T.P? 

The volume occupied by 1.6g of O2 at STP is

15 gram of a gas occupies 11.2 dm3 at S.T.P, the gas is