Question # 1

The color of Fe(OH)₂ ppt is.

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White

Brown

Muddy green

Blue

The process of removing temporary hardness of water.

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Clark's method

Washing soda method

Sodium zeolite

Filteration method

In the troposphere (lowest layer), the temperature decreases form 17°C to;

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-58°C

-93°C

-61°C

-49°C

Which of the following thing is a lewis base?

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NH₃

BF₃

H⁺

AlCl₃

Formula of acetaldehyde is:

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The gas used by animals to perform respiration.

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O₂

N₂

SO₂

Cl₂

Chemical form of gypsum.

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MgSO₄. 5H₂O

CaSO₄. 2H₂O

FeSO₄. 5H₂O

CuSO₄. 5H₂O

Acid occurring in sour milk

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Citric acid

Lactic acid

Bytyric acid

Malic acid

The residual oil is heated above 400 c to produce.

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Lubricants

Paraffin wax

Asphalt

All

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What formula could be of the X.

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C₃H₈

C₆H₁₂

C₄H₁₀

C₇H₁₆

At dynamic equilibrium:

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The reactions stops to proceed

The amounts of reactants and products are equal

The speed of the forward is reverse reactions are equal

The reaction can no longer be reversed

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

Red hair contains compound of.

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Iron

copper

titanium

Molybdenum

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