Mole Concept

Q. Mass of a mole of electrons is

1. 0.20mg
2. 1.00mg
3. 0.02mg
4. 0.55mg

Q. An atom is 10 times heavier than $\frac{1}{{12}^{th}}$ of mass of a C-12 . The mass of the atom in amu is:

1. 10
2. 1.2
3. 12
4. 120

Q. The total no of ions present in 111 g of $CaC{l}_2$ is

1. One mole
2. Two mole
3. Three mole
4. Four mole

Q. One mole of $P_4$ molecules contains

1. 4 molecules of p
2. 23 6.022 atoms of p
3. 1 molecule of p
4. atoms of p

Q. The average mass of one atom of gold is $3.2707\times {10}^{-22}$ g. The molar mass of gold is:

1. 
   
2. cannot caluculate
   
3. 
4. 
   

Q. Avogadro’s number represents the number of atoms in

1. 32g of oxygen
2. 12g of C -12
3. 32g of sulphur
4. 12.7g of iodine

Q. The number of molecules in 89.6 L of a gas at STP are:

1. 
   
2. 
3. 
   
4. 
   

Q. A piece of Cu contains $6.022\times {10}^{24}$ atoms. How many mole of Cu atoms does it contain?

1. 10 mole
2. 5 mole
3. 2 mole
4. 1 mole

Q. Which of the following contains maximum no. of molecules?

1. 150 cc of at S.T.P
2. 200 cc of at S.T.P
3. 50 cc of at S.T.
4. 150 cc of at S.T.P

Q. Which of the following is correct?

1. Mole = g-mol.wt
2. None of the above
3. g-mol.wt = mol. wt in gm = wt. of atom
4. Mole = molecules = molecules