FUTO Chemistry 2009/2010 Past Questions

Which of the following is a physical change?

In the reaction SnO₂ +2C --> Sn + 2CO the mass of coke containing 80% carbon required to reduce 0.302kg of pure tin oxide is
(Sn = 119, O = 16, C = 12)

The Avogadro number of 24g of magnesium is the same as that of pure tin oxide is

If gas occupies a container of volume 14cm³ at 18°C and 0.971 atm, its volume in cm³ is

The volume occupied by 1.58g of a gas at STP is 500cm³. What is the relative molecular mass of the gas?
(G.M.V. at STP = 22.40dm³)

Equal volumes of CO, SO₂, NO₂, and H₂S were released into a room at the sample point and time, which of the following gives the order of diffusion of the gases to the opposite corner of the room?

A basic postulate of the kinetic theory of gases is that the molecule of a gas moves in straight lines between collsions. This implies that

Which of the following terms indicates the number of bonds that can be formed by an atom?

x_(g) --> x_(g) the type of energy involved in the above transformation is

Chlorine consisting of two isotopes of mass number 35 and 37, has an atomic mass of 35.5 the relative abundance of the isotopes of mass number 37 is

10.0dm³ of air containing H₂S as an impurity was passed through a solution of Pb(NO₃)₂ until all the H₂S had reacted. The precipitate of PbS was found to weigh 5.02g. According to the equation,
Pb (NO₃)2 + H₂S ---> PbS + HNO₂ the percentage by volume of hydrogen sulphide.
(Pb = 207, s = 32, GMV at STP = 22.4dm³)

A blue solid, T, Which weighted 5.0g, was placed on a table. After 8 hours the resulting pink solid was found to 5.5g. It can be inferred that substance is

The effluent of an industrial plant used in the electrolysis of concentrated brine, with a flowering mercury cathode may contain impurities like

The solubility in moles per dm³ of 20g of CuSO₄ dissolved in 100g of water at 18°C is
(Cu = 63.5, S = 32, O = 16)

Smoke consists of

Na₂CrO₄ + CaCl₂ ---> CaCrO₄ + 2NaCl.
Given a solution of sodium oxalate in 50g of water at a temperature, calculate the maximum volume of 0.1M calcium chloride required to produce maximum calcium oxalate using the above equation.

2.0g of monobasic acid was made up to 25cm³ with distilled water 25.00cm³ of this solution required 20.00cm³ of 0.1M NaOH solution for complete neutralization. The molar mass of the acid is

What is the concentration of H⁺ ions in moles per dm³ of a solution 1 dm³ of 0.05M acid?

What volume of 11.0M hydrochloric acid must be diluted to obtain 1dm³ of 0.05M acid?

If 108g of silver is deposited in a silver coulometer connected in series with a copper coulometer, the volume of oxygen liberated is
(Ag = 108, cu = 64, GMV at STP = 22.40dm³)