Atoms in a $P_4$ molecule of white phosphorus are arranged regularly in space in which of the following way?

  • A
    At the corners of a tetrahedron
  • B
    At the corners of a cube
  • C
    At the corners of a four-membered ring
  • D
    At the centre and corners of an equilateral triangle

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In which oxidation state,group $15$ elements act as Lewis base?

In $P_4$ (tetrahedral) molecule:

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The number of $P-OH$ bonds and the oxidation state of the phosphorus atom in pyrophosphoric acid $(H_4P_2O_7)$ respectively are

Which of the following reactions correctly represent the products formed upon heating?
$(a) \ NH_4NO_2 \xrightarrow{\Delta } N_2 + 2H_2O$
$(b) \ NH_4NO_3 \xrightarrow{\Delta } N_2O + 2H_2O$
$(c) \ Na_2CO_3 \xrightarrow{\Delta } Na_2O + CO_2$
$(d) \ NH_4Cl \xrightarrow{\Delta } NH_3 + HCl$

Strong reducing behaviour of $H_3PO_2$ is due to

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