NECO Chemistry 2023 Questions and Answers Expo Obj & Essay Free

2

NECO Chemistry 2023 Questions & Answers: Get NECO Chemistry 2023 answers Objective and Essay for Monday, 24th July 2023, Paper III & II: Objective & Essay – Chemistry – 10:00am- 1:00pm.NECO Chemistry 2023 Answers Objective and Essay | Get Now

NECO Chemistry 2023 Answers Objective and Essay

01-10: DEADADECAD
11-20: BAE… for more click HERE now

(3a)(i) Classifying the alkanols:
– Butan-2-ol: secondary alkanol
– 2-methylpropanol: secondary alkanol
– 2-methylpropan-2-ol: tertiary alkanolNECO Chemistry 2023 Questions and Answers Expo Free

3a(ii) Two methods to prepare ethanol commercially:
– Fermentation: Ethanol can be produced by the fermentation of sugars using yeast. This is commonly used to produce alcoholic beverages and biofuels.
– Hydration of ethene: Ethanol can be produced by the hydration of ethene (ethylene) in the presence of a catalyst, such as phosphoric acid.

3a(iii) To calculate the relative molecular mass of Z, we need to compare the rates of effusion or diffusion of Z and hydrogen. The rate of effusion/diffusion is inversely proportional to the square root of the molar mass. Since hydrogen diffuses 6 times as fast, the molar mass of Z is 6 times larger than the molar mass of hydrogen. Therefore, the relative molecular mass of Z is 6 * 2 = 12.NECO Chemistry 2023 Questions and Answers Expo Free

(3bi) The elec…

For more NECO 2023 Chemistry Objective and Essay Answers, click HERE now.

or

https://wa.link/mz5r

Loading….

NECO 2023 Chemistry Questions and Answers 

(3civ) Three uses of hydrogen:
(i) Hydrogen is used as a fuel for combustion engines and fuel cells.
(ii) It is used in the production of ammonia for fertilizer and other chemicals.
(iii) Hydrogen is used in the hydrogenation of oils and fats in the food industry.

For more / assistance click Here now

or

https://paystack.com/pay/necopayment

Thanks for reading.

2 COMMENTS

LEAVE A REPLY

Please enter your comment!
Please enter your name here