class ten holiday home work

ARMY PUBLIC SCHOOL GOLCONDA

SUB: SCIENCE                                   HOLIDAY HOME WORK                                                 CLASS :  X            

BIOLOGY:

1 .Collect the pictures of HEART (internal structure).

1.       FISH

2.       FROG

3.       CROCODILE

4.       BIRD

5.       HUMAN

2. Draw and label KIDNEY diagram

CHEMISTRY:

1.       Balance the following equations step wise.

a.       H₂S + Cl₂                               HCl +  S

b.      Fe₃O₄  + Al                           Fe  + Al₂O₃

c.       FeCl₃  + H₂                           FeCl₂  + HCl

d.      C₂H₆  + O₂                            CO₂ + H₂O

e.      V₂O₅ + Ca                             V + CaO

f.        Cr₂O₃ + Al                            Al₂O₃ + Cr

g.       PbO₂  + HCl                         PbCl₂ + Cl₂ + H₂O

h.      NH₃ + O₂                              NO  + H₂O

i.         NaNO₃                                  NaNO₂ + O₂

j.        LiNO₃                                     Li₂O + NO₂ + O₂