Group VA and VIA elements in the periodic table include nitrogen, phosphorus, arsenic, antimony, and bismuth in Group VA, and oxygen, sulfur, selenium and tellurium, in Group VIA. These elements are essential in chemistry, biology, and industry, with important roles in compounds and reactions.
Chemistry Class 12 Chapter 4 Notes
Out of all the elements of groups VI-A the highest melting and boiling points is shown by the element: Po
Which metal is redered passive by HNO3due to formation of a film of metal oxide over the metal: CO
The brown gas formed when metal reduces HNO3: NO2
Out of all the elements of group VA, the highest ionization energy is possessed by: N
Laughing gas is chemically: N2O
Which of the following gives acidic oxide: N
The oxidation of NO in air produces: NO2
The most electronegative element of group V-A is: N
Which of the following is a reddish brown gas: NO2
Oxidation of NO in air produces: N2O4
In group V-A elements the most electronegative elements is: N
The brown gas formed, when metal reduce HNO3: NO2
Maximum number of unpaired electrons is in: O2
Out of all the elements of Group V-A the highest ionization energy is possessed by: N
Which catalyst is used in contact process: V2O5
Gold dissolves in “Aqua Regia” due to formation of Halide. Point out correct halide: AuCl3
What is %age of calcium phosphate in bone ash: 80
Which metal is redered passive by HNO<sub>3</sub>due to formation of a film of metal oxide over the metal: CO
The brown gas formed, when metal reduce HNO<sub>3</sub>: NO<sub>2</sub>
The oxidation of NO in air produces: NO<sub>2</sub>
The brown gas formed when metal reduces HNO<sub>3</sub>: NO<sub>2</sub>
The most electronegative element of group V-A is: N
Out of all the elements of Group V-A the highest ionization energy is possessed by: N
The composition of oleum is: H2S2O7
The element which is present in earth crust about 50% is: Oxygen
Oxidation of NO in air produces: N<sub>2</sub>O<sub>4</sub>
In which substance phosphorus is not present: Galena
Important : Review all previous years’ 12 class past papers for comprehensive practice and better exam preparation.