SS3 JAMB PRACTISE

Consider the reaction represented by the following equation: ¹⁴₇N + ⁴₂He ¹⁷₈^O + ¹₁Z. Z represents

• a proton

• an electron

• a beta particle

• helium nucleus

Which of the following elements exhibits variable oxidation states and forms complex ions?

• ₁₃Al

• ₁₅P

• ₂₀Ca

• ₂₄Cr

An element, W forms oxides with the formulae WO and W₂O. W is likely to be

• an alkali

• an alkaline earth metal

• a halogen

• a transition element

The type of bond formed when ₆X and ₁₇Y combine is

• metallic

• ionic

• hydrogen

• covalent

Which of the following metals will displace Zn from ZnSO_4(aq)?

• Calcium

• Copper

• Lead

• Silver

If metal M forms a chloride MCl_2, then the formula for its trioxocarbonate(IV)salt would be

• M₃(CO₃)₂

• M(CO₃)₂

• M₂CO₃

• MCO₃

What is the empirical formulae of an oxide of copper containing 4.48g of copper and 1.12g of oxygen? [Cu = 64, O = 16]

• Cu₂O₃

• Cu₂O

• CuO₂

• CuO

The mass of Nitrogen present in 20g NaNO_3(s) is [N = 14, O = 16, Na = 23]

• 0.165g

• 3.30g

• 4.0g

• 5.41g

How many atoms are contained in 0.6g Na? [Na = 23, Avogadro constant = 6.02 x10²³]

• 1.57 x 10²³

• 1.57 x 10²²

• 3.7 x 10²³

• 3.7 x 10²²

If the volume of a gas is 63.0cm³ at a temperature when the volume is increased to 84.0cm³ at constant pressure?

• 147⁰C

• 145⁰C

• 143⁰C

• 141⁰C