The alloy used for welding and plumbing contains?
A. aluminum and copper. B. copper and tin C. iron and aluminum. D. lead and antimony. E. lead and tin. Correct Answer: Option E – lead and tin.
“In any chemical reaction, the total mass of products is always equal to that of the reactants”. This statement of the law of?
A. conservation of matter. B. Constant composition C. definite proportions. D. multiple proportions. E. reciprocal proportions. Correct Answer: Option A – conservation of matter.
Which metal will dissolve in aqueous sodium hydroxide?
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?
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?
A. its atomic radius. B. its density. C. its relative atomic mass. D. the number of protons in its atom. E. the number of neutrons in its atoms Correct Answer: Option D – the number of protons in its atom.Products
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