The following alloys contain copper except

A. magnalium

B. duralumn

C. bronze

D. brass

E. type metal

How many mole of AgNO ₃ are there in 500cm³ of 0.01MAgNO₃ solution?

A. 0.005 mole

B. 0.05 mole

C. 0.5 mole

D. 5 moles

E. 1 mole

Which of the following statements explains why tetraoxosulphate (IV) acid is reqarded as a strong acid?

A. Tetraoxosulphate (IV) acid is dibasic

B. the acid is concentrated

C. the acid is complately ionized in aqueous solution

D. tetraxosulphate (IV) ions are very reactive

E. the acid is highly corrosive

Which of the following is not correct of glucose and fructose?They

A. are structural isomers

B. reduce fehling's solution

C. can be obtained by the hydrolysis of starch

D. are readily fermented by enzymes

E. are soluble in water

To what temperature must a gas be raised from 273K in order to double both its volume and pressure?``

A. 298k

B. 300k

C. 546k

D. 819k

E. 1092k

Which of the following explains why trioxonitrate (V) acid is not used for preparing hydrogen from metals?

A. it is volatile

B. it is strongly oxidizing

C. it forms a layer of oxide on the metal

D. trioxonitrate (V) salts are soluble in water

E. it renders the metals passive

Which of the following is normally used for drying ammonia gas?

A. Concentrated tetraoxonitrate (Vl) acid

B. Calcium oxide

C. anhydrous calcium chloride

D. phosphorus (V) oxide

E. anhydrous copper (ll) tetraoxosulphate (VI)

Nuclear reactions can be used in the following except

A. gauging the thickness of objects

B. making atomic bombs

C. curing cancer

D. generating electricity

E. purifying water

The decomposition of hydrogen peroxide is represented by the equation: 2H₂O_(l) + O_2(g) what mass of hydrogen peroxide would be required to produce 22.4dm₃ of oxygen at s.t.p? (H = 1, O = 16, molar volume of a gas at s.t.p. = 22.4dm₃)

A. 18 g

B. 34 g

C. 36 g

D. 64 g

E. 68 g

Which of the following compounds crystallizes without water of crystallization?

A. Na₂CO₃

B. CuSO₄

C. MgSO₄

D. NaCI

E. FeSO₄