Write your observation
Test tube 2 : ……………

5ml water is taken in 3 test tubes. Copper, sodium and magnesium of equal mass are dropped in different test tubes. Test tubes having copper and magnesium are heated: Write the observations in the heated test tubes.

Write any two observations of the photoelectric effect experiment.

5ml water is taken in 3 test tubes. Copper, sodium and magnesium of equal mass are dropped in different test tubes. Test tubes having copper and magnesium are heated: Write the equations for the reaction in the test tube in which sodium is dropped.

Suppose the mean of certain number of observation is 50 and the sum of all the observation is 450. Write down the number of observations.

Primary,secondary and tertiary alcohols can be distinguished by Lucas test. Write the observations for primary, secondary and tertiary alcohols in Lucas test.

Take a few sodium carbonate in a test tube and let it react with dilute sulphuric acid. The gas formed is passed through lime water. What do you observe? Which gas is formed? Write the chemical equation.