Ondo State Joint Exam 2018 Chemistry Expo Answer

Ondo state Joint Promotional Geography OBJ, THEORY/ESSAY Questions and Answer – 2017 Expo Runz

(1a)

Law of conservation of mass states that energy cannot neither be created nor destroy but changed from one form to another.

(ci)

Biotechnology is Biotechnology is the use of living systems and organisms to develop or make products, or “any technological application that uses biological systems, living organisms, or derivatives thereof, to make or modify products or processes for specific use.

(cii)

Biogas is a renewable energy that is gotten from the waste product material

(ciii)

Heavy Chemical are chemical that is manufactured in lager quantities and are required in large quantities in industry

e.g Ammonia, Sodium hydroxide etc

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(3ai)

Avogadro’s Law states that equal volumes of all gasses at the same temperature and pressure contain the same number of molecules.

(3bi)

(i)NaHCO 3 – Sodium hydrogen – trioxocarbonate (iv)

(ii)

(iii) KMnO4 – Potassium

Tetraoxosulphate (iv)

(iv) H 2 C= C(CL)CH =CH 2

2- Chlorobuta 1,3-diene

(3c)

(i) Cemment – Calcium oxide and clay

(ii) Glass – Sand, soda, line

(iii) Ceramics – Silica and oxides of magnesium ;Aluminum

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4)

(4ai)

Faraday’s first law of electrolysis states that the mass (m) of an element discharged during an electrolysis is directly proportional to the Quantity of electricity (Q) passing through it.

i.e M=Eit (Where E is constant)

(4bi)

1. Purification of metals Eg Cu Hg

2. Electroplating of one metal by another

3. Extraction of element e.g Na,K,H 2 , F2

4. Preparation of certain important compound e.g NaoH

Note: 2 is require.

(4ci)

1. Rhombic Sulphur

2.Monoclinic Sulphur

(4cii)

Draw a Tabular form as in the picture below ;

CLICK HERE FOR THE IMAGE

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(3ai)

Avogadro’s Law states that equal volumes of all gasses at the same temperature and pressure contain the same number of molecules.

(3aii)

(3bi)

(i)NaHCO 3 – Sodium hydrogen – trioxocarbonate (iv)

(ii)

(iii) KMnO4 – Potassium

Tetraoxosulphate (iv)

(iv) H 2 C= C(CL)CH =CH 2

2- Chlorobuta 1,3-diene

(3c)

(i) Cemment – Calcium oxide and clay

(ii) Glass – Sand, soda, line

(iii) Ceramics – Silica and oxides of magnesium ;Aluminum

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CLICK HERE FOR NUMBER 1Di CALCULATION

CLICK HERE FOR NUMBER 1Dii CALCULATION

(1a)

Law of conservation of mass states that energy cannot neither be created nor destroy but changed from one form to another.

(ci)

Biotechnology is Biotechnology is the use of living systems and organisms to develop or make products, or “any technological application that uses biological systems, living organisms, or derivatives thereof, to make or modify products or processes for specific use.

(cii)

Biogas is a renewable energy that is gotten from the waste product material

(ciii)

Heavy Chemical are chemical that is manufactured in lager quantities and are required in large quantities in industry

e.g Ammonia, Sodium hydroxide etc….

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