NEET Chemistry - New - Some p-Block Elements Principles and Process

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Question - 1

Which one of the following elements is unable to form MF63- ion?

  • A B
  • B Al
  • C Ga
  • D In

Question - 2

The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence :

  • A Al < Ga < In < Tl
  • B Tl < In < Ga < Al
  • C In < Tl < Ga < Al
  • D Ga < ln < Al < Tl

Question - 3

The tendency of BF3, BCl3 and BBr3 behave as Lewis acid decreases in the sequence:

  • A BCl3 > BF3 > BBr3
  • B BBr3 > BCl3 > BF3
  • C BBr3 > BF3 > BCl3
  • D BF3 > BCl3 > BBr3

Question - 4

Boric acid is an acid because its molecule :

  • A Contains replaceable H+ ion
  • B Gives up a proton
  • C Accepts OH- from water releasing proton
  • D Combines with proton from water molecule

Question - 5

AlF3 is soluble in HF only in presence of KF. It is due to the formation of :

  • A K3[AlF3H3]
  • B K3[AlF6]
  • C AlH3
  • D K[AlF3H]

Question - 6

Which of the following structure is similar to graphite?

  • A BN
  • B B
  • C B4C
  • D B2H6

Question - 7

Which one of the following molecular hydrides acts as a Lewis acid?

  • A NH3
  • B H2O
  • C B2H6
  • D CH4

Question - 8

Al2O3 can be converted into anhydrous AlCl3 by heating :

  • A Al2O3 with HCl gas
  • B Al2O3 with NaCl in solid state
  • C A mixture of Al2O3 and carbon in dry Cl2 gas
  • D Al2O3 with Cl2 gas

Question - 9

Which of, the following is the electron deficient molecule?

  • A B2H6
  • B C2H6
  • C PH3
  • D SiH4

Question - 10

In borax bead test which compound is formed?

  • A Ortho borate
  • B Meta borate
  • C Double oxide
  • D Tetra borate