1990 JAMB UTME Chemistry Past Questions

1990

A cycloalkane with the molecular formula C5H10 has ?

1990

Which of the following compounds gives a yellow residue when heated and also reacts with aqueous sodium hydroxide to give a white gelatinous precipitate soluble in excess sodium hydroxide solution?

1990

To make coloured glasses, small quantities of oxides of metals which form coloured silicates are often added to the reaction mixture consisting of Na2CO3 and SiO2. Such a metals is a?.

1990

Equal volumes of CO,SO2, and H2S were released into a room at the same point and time. Which of the following gives the order of diffusion of the gases to the opposite corner of the room?(S = 32, C = 12, O = 16, N = 14,…

1990

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

1990

If a gas occupies a container of volume 146 cm3 at 18°C and 0.97`atm, its volume 146cm3 at s.t.p is?

1990

Which of the following is formed when maltose reacts with concentrated tetraoxosulphate (VI) acid ?

1990

The octane number of a fuel whose performance is the same as that of a mixture of 55 g of 2,2,4- trimethly pentane and 45 g of n-heptane is ?

1990

X(g) → X(g). The type of energy involved in the above transformation is?

1990

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

1990

.....................P....Q.....R......SProton..............13....16....17.....19Electron............13....16....17.....19Neutron.............14....16....35.....20Which of the four atoms P,q,R and in S in the above data…

1990

A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that?

1990

Na2C2O4 + CaCl2 → CaC2O4 + 2NaCl. Given a solution of 1.9g of sodium oxalate in 50g of water at room temperature, calculate the minimum volume of 0.1 M calcium oxalate using the above equation?

1990

Smoke consist of?

1990

The solubility in moles per dm3 of 20g of CuSO4 dissolve in 100 of water at 180°C is?(Cu = 63.5, S = 32, O = 16)

1990

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

1990

10.0 dm3 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 5.02 g. According to the equation: Pb(NO3)2 + H2S → PbS + 2…

1990

0.1 faraday of electricity deposited 2.95 g of nickel during electrolysis of an aqueous solution.Calculate the number of moles of nickel that will be deposited by 0.4 faraday? (Ni = 58.7)

1990

If 10.8 g of silver is deposited in a silver coulometer volume of oxygen liberated is?

1990

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

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