Test paper chemistry -1
By:Ayushkumar
Mole concept-1
Time :1hour
M.M : 30
All questions are compulsory :
Section A
2. One mole of any substance contains how much particles ?
2marks
1mark
3.
4.
5.
6.
7.
1 mark
1 mark
1 mark
2 mark
2marks
1. Calculate no.of electron,proton and nuetron in caco3,co2,NH2CONH2?
What is the charge on one electron , proton and neutron?
What is the volume of one mole of any substances at STP ?
What is the difference between atomic mass and gram atomic mass?
Calculate the charge on 1 mole of electron ?
Calculate the molecular mass of glucose and sucrose?
Section B(Question 13 CARRY 3 MARKS AND QUESTION 4 CARRY MARKS)
8. Calculate number of atoms and gram atoms in the following:
i.
1mg of c
ii.
71g of Cl
iii.
iv.
22.4 g of Fe
60 kg of c
4 marks
9. One atom of an element weigh 9.75 ×10-23 g .calculate its atomic mass?
10.Calculate number of moles in the following:
i.
31.6 gm of kmno4
2 marks
ii.
63 gm of H2C2O4.2H2O
2 marks
iii.
29.4 gm of k2Cr2O7
11. Average atomic mass of a substance having two isotopes of atomic masses 470 and
600 amu respectively is 496 amu.calculate percentage of both isotopes in the
sample?
2 marks
12.Define the following:
i.
Avogadro hypothesis
ii.
Law of conservation of mass
3 marks
iii.
Law of definite proportion
13. Calculate number of atoms of carbon,hydrogen, oxygen in 6.84 mg of sucrose.
14.Calculate number of moles and molecules in 200 gm of caco3
i. also calculate no of atoms of ca,c,o
j. And also calculate no.of electron,proton and neutron?