Acids and salt assessment

1. Definitions and properties

a. Highlight which of the following is a basic oxide.

•Lithium oxide
•Aluminium oxide
•nitrogen dioxide

b. Define what is meant by a strong acid.

c. For the weak alkali ethyl amine, predict its likely pH (at 1 mol/dm), and the
colour it will turn universal indicator.

d. Explain two ways strong acids can be differentiated from weak acids without
the use of universal indicator.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.