ENNYSTON SCIENCE COMPETITION: 2ND ROUND - SENIOR 3

. Which of the following organs is responsible for the production of insulin?          

• (a) spleen

• (b)  adrenal  gland

• (c)  pancreas

• (d)  thyroid  gland

One of these is not a property of CO₂

• (a) it is a colourless, odourless gas

• (b) it cools and solidify into dry ice

• (c) it changes damp blue litmus paper pink

• (d) it aid combustion.

The alkanol is represented by the structure below CH₂OHCH₂CH₂OH.

• a. Primary and dihydric

• b. secondary and monohydric

• c. tertiary and dihydric

• d. secondary and dihydric.

The general formula for alkynes is

                                           

• a.    C_nH_2n+2  

• b. C_nH_2n 

•     c. C_nH_2n-2

• d. C_2nH_2n

Water is temporarily hard because it contains

                                    

• a.     CaSO₄

• b. MgSO₄  

• c. Cl₂    

• d. Ca(HCO₃)₂

Electrovalent compounds normally

                  

• a. have low boiling point

•   b. have mobile electrons 

• c. conduct electricity in the solid state   

• d. dissolve in polar solvent

Snails  belong   to  the  phylum        

• (a)  Annelid

• (b)  Mollusca

• (c)  Arthropoda

• (d)  Nematoda

Ability   of  the  human  eye  to  focus   image  accurately  on  the  retina  is  called       

• (a)  astigmatism

• (b)  myopia

• (c)  adjustment

•   (d)  accommodation

Which  of   the  following  is  an  emergency    hormone?     

• (a)  insulin

•   (b)  oestrogen 

• (c)  thyroxine 

• (d)  adrenalin

The   maintenance   of   a   constant   internal    environment   in   the   body   of  a   mammal   is   known  as        

• (a)  osmosis

• (b)  plasmolysis

• (c)  excretion

• (d)  homeostasis