DELSU Chemistry 2013/2014 Past Questions

If concentrated H₂SO₄, is added to sugar and warned gently, the sugar changes from white brown and finally to a black mass of carbon. In this reaction, concentrated H₂SO₄ is acting as:

Which of the following can have an isomer?

The final products of the reaction between methane and chlorine in the presence of ultraviolet light are hydrogen chloride and:

In the electrolysis of brine, the anode is

In the electrolytic extraction of aluminum the function of molten cryolite is to

0.05 moldm^-3 HCL is neutralized by 25cm³ 3 NaOH. If the solvent volume of the acid used is 32.00 cm What is the concentration of the base?

The periodic classification of the elements is an arrangement of the elements in order of their

Helium atoms are chemically unreactive because:

How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm³ of 6MHCI? (Mg= 24 H=1, CI = 35.5)

A sample of orange juice is foundida pH of 3.80. What is the concentration of the hydroxide ion in the juice?

CaO + H2O → Ca(OH)_2(s) Δ H-65kj. The process represented by the above equation is known as

The modern process of manufacturing steel from irorn is by