The p-Block Ele...

The electronic configuration of four atoms are given in brackets:

\(L:\left(1 s^{2} 2 s^{2} 2 p^{1}\right)\)

\(M:\left(1 s^{2} 2 s^{2} 2 p^{5}\right)\)

\(Q:\left(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}\right)\)

\(R:\left(1 s^{2} 2 s^{2} 2 p^{2}\right)\)

The element that would most readily form a diatomic molecule is:

Ammonia is used in detection of \(C u^{2+}\) ion because:

Choose the correct statements from the following?

A mixture is known to contain \(N O_{ {3}}^-\) and \(N O_{ {2}}^-\). Before performing ring test for \(N O_{ {3}}^-\) the aqueous solution should be made free of \(N O_{ {2}}^-\). This is done by heating aqueous extract with:

Atomicity of phosphorus is:

In the clathrates of xenon with water the nature of bonding in \(\mathrm{Xe}\) and \(\mathrm{H}_{2} \mathrm{O}\) molecule is:

Phosphours sulphide \(P_{4} S_{3}\), a well known chemical used in match industry has many \(P-S\) bonds?

Select correct statement for \(\mathrm{B r F_{5}}\).

In solid state \(N_{2} O_{5}\) exists as:

Nitrogen shows different oxidation states ranging from:

For the reaction \(\mathrm{N}_{2} \mathrm{O}_{4}(g) \rightleftharpoons 2 \mathrm{NO}_{2}(g)\), if percentage of \(\mathrm{N}_{2} \mathrm{O}_{4}\) are \(25 \%, 50 \%, 75 \%\) and \(100 \%\), then the sequence of observed vapour densities will be

One of the acid listed below is formed only from \(\mathrm{P_{2} O_{3}}\), the rest are formed from \(\mathrm{P}_{2} \mathrm{O}_{5}\). Acid formed from \(\mathrm{P}_{2} \mathrm{O}_{3}\) is:

The total number of electrons that take part in forming bonds in \(\mathrm{N}_2\) is:

Elements of the group-15 form compounds in +5 oxidation state. However, bismuth forms only one well-characterized compound in +5 oxidation state. The compound is:

_______ group elements are known as chalcogens.

Phosphine \(\left[\mathrm{P H_{3}}\right]\) decomposes to produce \(\mathrm{P_{4}(g)}\) and \(\mathrm{H_{2}(g)}\). What would be the change in volume when \(100 \mathrm{ml}\) of \(\mathrm{P H_{3}(g)}\) is completely decomposed?

Which of the nitrogenous fertilizers can meet the needs for immediate requirement of the crop?

Which of the following is not formed when \(\mathrm{H_{2} S}\) reacts with acidic \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) solution?

The products formed by the complete hydrolysis of \(\mathrm{PCl}_{3}\) are:

Which of the following statement is wrong?

Nitrogen is relatively inactive element because:

Bond angle in \(\mathrm{H_{2} O\left(104.5^{\circ}\right)}\) is higher than the bond angle of \(\mathrm{H_{2} S\left(92.1^{\circ}\right)}\). The difference is due to:

The ions \(\mathrm{Mg}^{+2}\) and \(\mathrm{PO}_{4}^{-3}\) combine to form compounds:

Which of the following factors would favour the formation of ammonia?

Nitrogen liberated by the thermal decomposition of only :

The correct structure of \(\mathrm{P C l_{3} B r_{2}}\) is:

The structure of white phosphorus is:

Strongest acid among the following is:

Which gas is produced when calcium nitride \(\left(C a_{3} N_{2}\right)\) is hydrolyzed by water?

Xenon has closed shell configuration but is known to give compounds with fluorine because: