CPU 1 - General Properties Of 15Th Group (Nitrogen & Phosphorous) - Class 12 MCQ

Boiling point of liquid nitrogen is

Oxidation of ammonia with CuO produce a gaseous chemical which can also be obtained by

Which of the molecular species has unpaired electrons?

Which is the correct order w.r.t the given property?

The ratio of bond pairs and lone pairs in a P₄ molecule is

Direction (Q. Nos. 9-13) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Q. 

Regarding black phosphorus correct statements are

Which are correct statements?

The correct statements regarding N and P are

The correct statements among the given are

Which of the following statements is/are correct?

Direction (Q. Nos. 14 and 15) This section contains a paragraph, describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

Passage

Phosphorus was discovered by Brand (1669), Scheele isolated from bone ash and Lavoisier proved its elemental nature (1777). The principal minerals are phosphate rock, fluoroapatite and chloroapatite. Phosphorus is prepared by the direct reduction of phosphorite by carbon in the presence of silica. It exists in different allotropic forms such as yellow or white, red, α-black, β-black, etc. White P is most reactive, poisonous, glows in dark and readily catches fire due to unstable discrete P₄ molecules. Red P is inert, non-poisonous, does not glow etc., due to its polymeric structure, α-black, β -black allotropes are also chemically inert, do not ignite at normal temperature. It has layer structure like graphite and acts as conductor.

Q. 

The allotrope of phosphorus with low ignition temperature is

Phosphorus was discovered by Brand (1669), Scheele isolated from bone ash and Lavoisier proved its elemental nature (1777). The principal minerals are phosphate rock, fluoroapatite and chloroapatite. Phosphorus is prepared by the direct reduction of phosphorite by carbon in the presence of silica. It exists in different allotropic forms such as yellow or white, red, α-black, β-black, etc. White P is most reactive, poisonous, glows in dark and readily catches fire due to unstable discrete P₄ molecules. Red P is inert, non-poisonous, does not glow etc., due to its polymeric structure, α-black, β -black allotropes are also chemically inert, do not ignite at normal temperature. It has layer structure like graphite and acts as conductor.

Q. 

The allotrope of phosphorus that has layer lattice like graphite is

Direction (Q. Nos. 16 and 17) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

Match the Column I with Column li and mark the correct option from the codes given below. 

Match the Column I with Column II and mark the correct option from the codes given below.

Direction (Q. Nos. 18-20) This section contains 3 questions. When worked out wilt result in an integer from 0 to 9 (both inclusive).

Q. 

How many of the given chemicals liberate dinitrogen on heating?

Number of chemical species having negative oxidation state for nitrogen among

According to moiecular orbital theory, number of electrons present in the antibonding orbitals of dinitrogen.

Direction (Q. No. 21) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

Q. 

Satement I : N₂ is less reactive than P₄.

Statement II : Nitrogen has more electron gain enthalpy than phosphorus.