Chemistry

When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as?

A. disintegration B. polymerization C. cracking D. degradation Correct Answer: Option C - cracking Explanation Cracking is the breakdown of…

5 years ago

Which of the compounds is composed of Al, Si, O and H?

A. Epson salt B. Limestone C. Clay D. Urea Correct Answer: Option C - Clay Explanation Between the five main…

5 years ago

H2S(g) + Cl2(g) → 2HCl(g) + S(g) In the reaction below, the substance that is reduced is?

H2S(g) + Cl2(g) → 2HCl(g) + S(g) A. H2S B. S C. HCl D. Cl2 Correct Answer: Option D -…

5 years ago

The elements in the periodic table are listed in order of increasing?

A. relative atomic number B. atomic mass C. relative isotopic mass D. nuclear charge Correct Answer: Option A - relative…

5 years ago

The alkanoic acid found in human sweat is?

A. CH3-COOH B. CH3—CH2—COOH C. H-COOH D. CH3 Correct Answer: Option B - CH3—CH2—COOH Explanation Bacteria of the genus Propionibacterium…

5 years ago

The general formula of alkanones is?

A. RCHO B. R2CO C. RCOOH D. RCOOR Correct Answer: Option B - R2CO Explanation Alkanones also is known as…

5 years ago

The situation obtained when a perfect gas expands into a vacuum is?

A. ΔH is positive and TΔ S is zero B. ΔH is positive and T Δ S is negative C.…

5 years ago

Sieving is a technique used to separate mixtures containing solid particles of?

A. small sizes B. large sizes C. different sizes D. the same size Correct Answer: Option C - different sizes…

5 years ago

If the molecular mass of tetraoxosulphate (VI) acid is 98, calculate its vapour density.

A. 196 B. 49 C. 106 D. 82 Correct Answer: Option B = 49 Explanation Molecular mass = Vapour Density…

5 years ago

Which of these alloys contains copper?

A. solder B. steel C. permalloy D. bronze Correct Answer: Option D - bronze Explanation Bronze is an alloy consisting…

5 years ago