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JEE Mains | PYQ

Dinitrogen is a robust compound, but reacts at high altitudes to form oxides. The oxide of nitrogen that can damage plant leaves and retard photosynthesis is:

Aqueous solution of which of the following boron compounds will be strongly basic in nature?

Among the following basic oxide is:

Given below are two statements: one is labelled as Assertion \( (A) \) and the other is labelled as Reason \( (R) \).
Assertion \( (A) \): Boron is unable to form \( \mathrm{BF}_6^{3-} \)
Reason \( (R) \): Size of \( \mathrm{B} \) is very small.

The total number of acidic oxides from the following list is:
\( \text{NO} \), \( \text{N}_2\text{O} \), \( \text{B}_2\text{O}_3 \), \( \text{N}_2\text{O}_5 \), \( \text{CO} \), \( \text{SO}_3 \), \( \text{P}_4\text{O}_{10} \)

Match List –I with List – II

Match List – I with List – II.

Choose the most appropriate answer from the options given below:

Nitrogen gas is obtained by thermal decomposition of:

Number of electron deficient molecules among the following \( \mathrm{PH_3} \), \( \mathrm{B_2H_6} \), \( \mathrm{CCl_4} \), \( \mathrm{NH_3} \), \( \mathrm{LiH} \) and \( \mathrm{BCl_3} \) is:

Given below are two statements:
Statement-I: The pentavalent oxide of group-\( 15 \) element, \( \mathrm{E_2O_5} \), is less acidic than trivalent oxide, \( \mathrm{E_2O_3} \), of the same element.
Statement-II: The acidic character of trivalent oxide of group \( 15 \) elements, \( \mathrm{E_2O_3} \), decreases down the group.
In light of the above statements, choose most appropriate answer from the options given below:

Borazine, also known as inorganic benzene, can be prepared by the reaction of \( 3 \)-equivalents of “X” with \( 6 \)-equivalents of “Y”. “X” and “Y”, respectively are:

Match List –I with List –II, match the gas evolved during each reaction.

Choose the correct answer form the options given below:

Match List-I with List-II.

Choose the correct answer from the options given below:

Heating white phosphorous with conc. \( \mathrm{NaOH} \) solution gives mainly: