Classification of elements and Periodicity in properties MCQs for NEET — Chemistry Questions with Answers

  Lewis acidity order : ${\mathrm{SiF}}_4<{\mathrm{SiCl}}_4<{\mathrm{SiBr}}_4<{\mathrm{SiI}}_4$ 

Melting point : ${\mathrm{NH}}_3>{\mathrm{SbH}}_3>{\mathrm{AsH}}_3>{\mathrm{PH}}_3$

Boiling point : ${\mathrm{NH}}_3>{\mathrm{SbH}}_3>{\mathrm{AsH}}_3>{\mathrm{PH}}_3$

Dipole moment order : ${\mathrm{NH}}_3>{\mathrm{SbH}}_3>{\mathrm{AsH}}_3>{\mathrm{PH}}_3$

(a) FTFT        (b) TFTF        (c) FFTT         (d) FFTF

M can form multiple bond

M is of second period element 

Atomicity of non-metal is 4

The range of oxidation number for M is +5 to -3

Acidic character of oxy acids increases with increasing value of n.

oxidising power of oxy acids increases with decreasing value of n.

Thermal stability of oxy acids decreases with increasing value of n.

$\text{'}\mathrm{C}—\mathrm{O}\text{'}$ bond order decreases with decreasing value of n  

On decreasing value of $\text{'}\mathrm{n}\text{'}, \text{'}\mathrm{Cl}—\mathrm{O}\text{'}$ bond order increases 

On the increasing value of $\text{'}\mathrm{n}\text{'}, \text{'}\mathrm{Cl}—\mathrm{O}\text{'}$ bond length increases

On the increasing value of $\mathrm{n},$ oxidation number of central atom increases 

On the increasing value of  $\mathrm{n},$ hybrid orbitals on the central atom increase

Colourless gas insoluble in        Silver/grey solid reacts with ${\mathrm{H}}_2\mathrm{O}$      Colourless gas forms a strong

        ${\mathrm{H}}_2\mathrm{O}$                                        to form an alkali                                 acid in ${\mathrm{H}}_2\mathrm{O}$

Colourless liquid, no reaction    Silver/grey solid forms ${\mathrm{H}}_2$ and          Ionic solid with formula $\mathrm{ZH}$

        with ${\mathrm{H}}_2\mathrm{O}$                                  ${\mathrm{H}}_2\mathrm{O}$                                

Non-polar compound reacts       Silver/grey ionic solid with               Forms when water is added

     with ${\mathrm{Cl}}_2$ in light                            formula ${\mathrm{YH}}_2$                                 to phosphorus and element Z

Colourless gas which burns        Silver/grey solid which reacts           Colourless, corrosive liquid

          with air                                     violently with acids                             at STP

The order of stability of oxidation state for +3 is $B{i}^{3+}>S{b}^{3+}>A{s}^{3+}$ and for +5 is $B{i}^{5+}<S{b}^{5+}<A{s}^{5+}$

In the case of nitrogen, all oxidation states from +1 to +4 tend to disproportionate in acid solution.

There is considerable increase in covalent radius from N to P but from As to Bi only a small increase in covalent radius is observed.

All of these.

Na₂O

Al₂O₃

P₂O₅

SO₃

P₄O₆ 

 P₄O₁₀ 

As₄O₆ 

 As₄O₁₀ 

The oxidation state of oxygen is +2 in OF₂.

Acidic character follows the order H₂O < H₂S < H₂Se < H₂Te.

The tendency to form multiple bonds increases in moving down the group from sulphur to tellurium (towards C and N)

Sulphur has a strong tendency to catenate while oxygen shows this tendency to a limited extent.

Among HClO₃, HClO₄,HClO and HClO₂, HClO₃ is the weakest acid.

Bromide ion can be oxidised to Br₂ by chlorine.

Cl₂O₇ is the anhydride of HClO₄.

Among halide ions, F^- has the highest hydration energy.