Chemistry

The following are ores of metals EXCEPT?

A. bauxite B. dolomite C. graphite D. haematite E. magnetite Correct Answer: Option C - graphite

3 years ago

The green house effect is a climatic condition associated with the presence of excess?

A. carbon (II) oxide B. carbon (IV) oxide C. hydrogen sulphide D. nitrogen (II) oxide E. oxygen Correct Answer: Option…

3 years ago

Which of the following is a solid at room temperature?

A. Argon B. Bromine C. Chlorine D. Fluorine E. Iodine Correct Answer: Option E - Iodine

3 years ago

The relationship between equilibrium constant and free energy change is represented as?

A. δ G° = -nFE ° B. δG°-RT ln K C. δ G°= + RT In k D. δG° =…

3 years ago

Non-polar molecules are held together by?

A. co-ordinate bond B. covalent bond C. electromagnetic force D. hydrogen bond E. Van der Waals forces Correct Answer: Option…

3 years ago

The Ideal Gas Law is expressed mathematically as?

A. P1 /T1 = P2/T2 B. P1/V1 = P2V2 C. PV =nRT D. PV =KT E. V1/T1 = V2/T2 Correct…

3 years ago

Two elements X and Y with electronic configurations 2,8,2 and 2,8,7 respectively, are likely to combine by _________bonding

A. covalent B. dative C. electrovalent D. hydrogen E. metallic Correct Answer: Option C - electrovalent

3 years ago

The furring of kettles and boilers are caused by?

A. calcium hydroxide B. calcium hydrogen trioxocarbonate (IV) C. calcium trioxocarbonate (IV) D. calcium tetraoxocarbonate E. magnesium tetraoxocarbonate (VI) Correct…

3 years ago

How many zones are present in a luminous Bunsen burner flame?

A. 2 B. 3 C. 4 D. 5 E. 6 Correct Answer: Option C - 4

3 years ago

When air is passed through alkaline pyrogallol and then lime water, the gases left are?

A. nitrogen and carbon (IV) oxide B. nitrogen and noble gases C. nitrogen and oxygen D. nitrogen, carbon (VI) oxide…

3 years ago
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