DELSU Chemistry 2014/2015 Past Questions

A certain compound, on analysis gave 2.028 of Carbon, 0.35g of Hydrogen, and 2.08g of Oxygen. If the molecular mass is 90, calculate the molecular formula.

An effect of thermal pollution in watler bodies is that the

Which of the following compounds is soapless detergent

How many atoms are present in 6.0g of magnesium
[Mg = 24, Na = 6.02 x 10²³ /mol]

Which of the following pollutants is associated with brain damage?

The maximum number electrons in the L shell of an atom is

Calculate the volume of 0.5moldm^-3 H₂SO₄ that is neutralized by 25cm^{3 of 0.1 mol dm-3 NaOH}

82. Which one of these is not found in an atom

The number of isomers that can be obtained from C₄H₁₀ is

Which of the 3d, 4s, 4p, 4d has the lowest energy

Carbon is often deposited in the exhaust pipe of cars because of the

Plaster of Paris (P.O.P) used for making cast in hospitals is