II PUC CHEMISTRY PREPARATORY EXAM - 1 Questions & answers

SPANDANA PU SCIENCE COLLEGE, ILKAL – 587 125
II PUC COLLEGE LEVEL PREPARATORY EXAMINATION, JAN – 2023
Sub : Chemistry (34)
Date : 05.01.2023 Max.Marks = 70

Instructions: i) The question paper has four part. All the four parts are compulsory.
PART – A carries 20 marks. Each question carries one mark.
PART – B carries 8 marks. Each question carries two marks.
PART – C carries 12 marks. Each question carries three marks.
PART – D carries 30 marks. Each question carries five marks.
ii) Write balanced chemical equations and draw diagrams wherever necessary. Use log
table and simple calculator if necessary ( use of scientific calculator is not allowed )

PART – A
I. Select the correct option from the given choice. 15 x 1=15

1. In the calculation of density of a unit cell by using formula, = , the value of
‘z’ for a simple cubic unit cell is
a) one b) two c) three d) four

2. What happens to freezing point of benzene when naphthalene is dissolved?
a) Increases b) Decreases
c) Remains unchanged d) First decreased decreases and then increases

3. Unit of molarity is;
a) moles/litre b) moles/kg c) kg/moles d) millimoles/gram

4. H2 – O2 fuel cell will use H2 and O2 in the ratio _____ by mole;
a) 2 : 1 b) 1 : 2 c) 1 : 4 d) 1 : 16

5. For a reaction 2HI → H2 + I2, the rate of reaction at a given instant can be
represented by;
[ ] [ ] [ ] [ ] [ ] [ ]
a) =− =− b) − =− =−
[ ] [ ] [ ] [ ] [ ] [ ]
c) − = = d) − = =

6. The size of the colloidal particle is;
a) 10−9− 10−6m b) 10−9– 10 −12m c) 10−3– 10−9m d) 10−3 –10−6m

7. Mond’s process is used to refine;
a) Gold b) Al c) Ni d) Zn

8. A radioactive noble gas is
a) Ne b) Ra c) He d) Ar

9. Manganese exhibits maximum oxidation state of;
a) +6 b) +5 c) +7 d) +2