Chemistry Questions and Answers

A piece of metal (M) is dissolved in nitric acid and the resulting solution is treated with a small quantity of sodium hydroxide to produce a white precipitate (B) which redissolves on the addition of excess alkali. The precipitate (B)when ignited in a crucible produces the oxide of the metal(m). The METAL M is

Which of the following raw materials would be required from the smelting of iron ore in a blast furnace?

When excess ethanol is heated to 145 ^oC in the presence of concentrated sulphuric acid, the product is

A gas occupies 30.0 dm³ at S.T.P. What volume would it occupy at 91^oC and 380 mm Hg?

One of the following techniques can be used to show that chlorophyll pigment is a mixture of chemical compounds and not a single coloured compound