General Knowledge - Chemistry

Exercise :: Chemistry - Section 1

  • Chemistry - Section 1
49. 

The high reactivity of fluorine is due to

A. its high electro negativity
B. small size of fluorine atom
C. availability of d-orbitals
D. strong F - F bond

Answer: Option A

Explanation:

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50. 

The iron ore magnetite consists of

A. Fe2O3
B. Fe3OH4
C. FeCO3
D. 3Fe2O3 .. 3H2O

Answer: Option A

Explanation:

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51. 

The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

A. 5x/36
B. 5x
C. 7.2 x
D. x/6

Answer: Option A

Explanation:

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52. 

The major constituent of air is

A. nitrogen
B. carbon dioxide
C. oxygen
D. hydrogen

Answer: Option A

Explanation:

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53. 

The main chemical constituent of clay is

A. silicon oxide
B. aluminium borosilicate
C. zeolites
D. aluminium silicate

Answer: Option D

Explanation:

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54. 

The mineral containing both magnesium and calcium is

A. magnesite
B. calcite
C. carnallite
D. dolomite

Answer: Option D

Explanation:

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