P Block Elements - Topic Wise Multiple Choice Questions (MCQ)
Topic Wise free P Block Elements MCQ for 11th 12th exam Practice Multiple Choice Questions and answer for JEE-mains State CET Engineering Entrance GATE free Online Test
11 )
Diborane combines with ammonia at 1200 C to give
B2H6 NH3
B2H6. 2NH3 ✔
B2H6.3NH3
B2H6 . 4 NH3
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12 )
Cohen Orthoboric acid (H3BO3) is strongly heated, the residue is
Boron
Meta boric acid ✔
Al2O3, 2H2O
None of above
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13 )
Which of the statements about anhydrous aluminium chloride is correct
It exists as AlCl3 molecule
It is not easily hydrolysed
It sublimes at 100 deg C under vacuum ✔
It is a strong lewis base
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14 )
When Al is added to KOH solution
No action takes place
Oxygen is evolved
Water is produced
Hydrogen is evolved ✔
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15 )
Aluminium is more reactive than iron. But Aluminium is less easily corroded than iron because
Aluminium is noble metal
Oxygen forms a protective oxide layer
Iron undergoes reaction easily with water ✔
Iron forms mono and divalent ions
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