“In any chemical reaction, the total mass of products is always equal to that of the reactants”. This statement of the law of?

5 years ago

A. conservation of matter. B. Constant composition C. definite proportions. D. multiple proportions. E. reciprocal proportions. Correct Answer: Option A…

Which metal will dissolve in aqueous sodium hydroxide?

5 years ago

A. aluminium B. copper C. iron D. sikeer E. tin Correct Answer: Option A - aluminium

Which compound can be used as a reducing agent in a reaction?

5 years ago

A. Cl2 B. KMnO4 C. K2Cr2O7 D. MnO2 E. Na2SO3 Correct Answer: Option E - Na2SO3

The position of an element in the Periodic Table is determined by?

5 years ago

A. its atomic radius. B. its density. C. its relative atomic mass. D. the number of protons in its atom.…

Which element contains the greatest number of moles?

5 years ago

A. 8 g of Helium B. 48 g of Carbon C. 78 g of Potassium D. 130g of Zinc E.…

The use of sulphur to vulcanize rubber is to make it?

5 years ago

A. blacker B. cheaper C. more elastic D. tougher E. softer Correct Answer: Option D - tougher

The atomic number of iron is 56. The number of unpaired electrons in the Fe3+ ion is?

5 years ago

A. 1 B. 2 C. 3 D. 4 E. 5 Correct Answer: Option C - 3

Animal charcoal differs from wood charcoal in that it?

5 years ago

A. has a dark colour B. has a high carbon content C. is a good absorbent D. is crystalline. E.…

Which statement BEST describes the process of oxidation?

5 years ago

A. addition of hydrogen B. loss of oxygen C. decrease in oxidation number D. loss of electrons E. gain of…

The decreasing order of the oxidizing power of the halogens is?

5 years ago

A. Br>I>Cl>F B. F>I>Cl>Br C. F>Cl>Br>l D. I>Br>Cl>F E. Cl>Br>F>I   Correct Answer: Option C - F>Cl>Br>l

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