Chemistry

Which of the following is not a property of magnesium oxide?

A. High melting point B. Dissolution in polar solvents C. Presence of ionic bonds D. Possession of crystal lattice E.…

5 years ago

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

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

5 years ago

A measure of the degree of disorder in a chemical system is known as the?

A. enthalpy B. free energy C. activation energy D. entrophy E. equilibrium Correct Answer: Option D - entrophy

5 years ago

Catalytic hydrogenation of alkenes produces compounds with the general formula?

A. CnH2n+1OH B. CnH2n+1 C. CnH2n+2 D. CnH2n-2 E. Cx(H2O)y Correct Answer: Option C - CnH2n+2 Explanation In a hydrogenation…

5 years ago

The number of replaceable hydrogen atoms in one acid indicates its?

A. basicity B. acidity C. alkalinity D. reactivity E. pH value Correct Answer: Option A - basicity

5 years ago

The components of universal indicator solution can best be separated by?

A. chromatography B. filtration C. evaporation D. crystallization E. fractional distillation Correct Answer: Option A - chromatography

5 years ago

The following salts dissolve readily in cold water except?

A. CaCI2 B. PbSO4 C. (NH4)2SO4 D. Na2CO3 E. Na2SO3 Correct Answer: Option B - PbSO4

5 years ago

Copper (ll) tetraoxosulphate (VI) is often added to swimming pools because it?

A. prevents the growth of algae B. coagulates suspended particles C. neutralizes dissolved gases in water D. reacts with any…

5 years ago

Metals which react with steam only when they are red-hot include?

A. copper B. sodium C. calcium D. gold E. iron Correct Answer: Option E - iron

5 years ago

The function of limestone in the extraction of iron in the blast furnace is?

A. removal of the earthly impurities B. decomposition of the iron ore C. conversion of iron (lll) to iron (ll)…

5 years ago