Chemistry

Which of the following results in the fall of acid rain?

A. oxide of lead B. particulate matter C. oxides of sulphur D. gaseous hydrocarbon Correct Answer: Option C - oxides…

5 years ago

Detergents are manufacture with strength hydrocarbon chains is to make them?

A. soluble B. biodegradable C. cheaper D. foamy Correct Answer: Option B - biodegradable Explanation Biodegradable because the straight hydrocarbons…

5 years ago

The entropy change in the system below is?

NH3(g) + HCl(s) → NH4Cl (s) A. positive B. zero C. negative D. intermediate Correct Answer: Option C - negative…

5 years ago

When sugar is dissolve in ten, the reaction is accomplished by?

A. positive change B. negative entropy change C. no entropy change D. a minimum entropy change Correct Answer: Option C…

5 years ago

The elements that belong to the third period of periodic table are?

A. Li, Be, Al and D B. Na, P, O and Cl C. B, C, N, and O D. Na,…

5 years ago

An oxidation state of Cr in K2Cr2O7?

A. 7 B. 6 C. 5 D. 4 Correct Answer: Option B - 6 Explanation The oxidation state of K2Cr2O7…

5 years ago

A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180, Find the molecular formula [H = 1, C = 12, O = 16)

A. CH2O B. C3H6O3 C. C6H12O6 D. C6H12O3 Correct Answer: Option C - C6H12O6 Explanation C = 40%, 40/12 =…

5 years ago

The energy value of petrol can be determined by?

A. Bomb calorimeter B. Catalytic cracker C. Fractionating column D. Thermometer Correct Answer: Option C - Fractionating column Explanation Fractionating…

5 years ago

There are basic particles from which matter called be made except?

A. Salt B. Atom C. Ion D. Molecule Correct Answer: Option A - Salt Explanation Salt is a chemical used…

5 years ago

The number of isomers formed by C6H14 is?

C6H14 A. 4 B. 5 C. 2 D. 3 Correct Answer: Option B = 5 Explanation The number of isomers…

5 years ago
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