Question

The correct statement with respect to dinitrogen is:

JEE Main 2020 (06 Sep Shift 1)

Options

• A: $N_2$ is paramagnetic in nature.
• B: it can combine with dioxygen at $25°\mathrm{C}$
• C:  liquid dinitrogen is not used in cryosurgery.
• D: it can be used as an inert diluent for reactive chemicals

Question

Match List - I with List - II:

Choose the most appropriate answer from the options given below:

JEE Main 2021 (27 Aug Shift 1)

Options

• A: $\left(\mathrm{a}\right)-\left(\mathrm{iii}\right), \left(\mathrm{b}\right)-\left(\mathrm{iv}\right), \left(\mathrm{c}\right)-\left(\mathrm{ii}\right), \left(\mathrm{d}\right)-\left(\mathrm{i}\right)$
• B: $\left(\mathrm{a}\right)-\left(\mathrm{iv}\right), \left(\mathrm{b}\right)-\left(\mathrm{i}\right), \left(\mathrm{c}\right)-\left(\mathrm{ii}\right), \left(\mathrm{d}\right)-\left(\mathrm{iii}\right)$
• C: $\left(\mathrm{a}\right)-\left(\mathrm{iii}\right), \left(\mathrm{b}\right)-\left(\mathrm{ii}\right), \left(\mathrm{c}\right)-\left(\mathrm{iv}\right), \left(\mathrm{d}\right)-\left(\mathrm{i}\right)$
• D: $\left(\mathrm{a}\right)-\left(\mathrm{iv}\right), \left(\mathrm{b}\right)-\left(\mathrm{ii}\right), \left(\mathrm{c}\right)-\left(\mathrm{i}\right), \left(\mathrm{d}\right)-\left(\mathrm{iii}\right)$

Question

Which one of the following elemental forms is not present in the enamel of the teeth?

JEE Main 2022 (24 Jun Shift 1)

Options

• A: ${\mathrm{Ca}}^{2+}$
• B: ${\mathrm{P}}^{3+}$
• C: ${\mathrm{F}}^{-}$
• D: ${\mathrm{P}}^{5+}$

Question

Given below are two statements :

Statement I: The pentavalent oxide of group-$15$ element, ${\mathrm{E}}_2{\mathrm{O}}_5$, is less acidic than trivalent oxide, ${\mathrm{E}}_2{\mathrm{O}}_3$, of the same element.

Statement II : The acidic character of trivalent oxide of group $15$ elements, ${\mathrm{E}}_2{\mathrm{O}}_3$, decreases down the group.

In light of the above statements, choose most appropriate answer from the options given below

JEE Main 2022 (28 Jun Shift 1)

Options

• A: Both Statement I and Statement II are true.
• B: Both Statement I and Statement II are false.
• C: Statement I is false but statement II is true.
• D: Statement I true, but statement II is false.

Question

The strongest reducing agent amont the following is:

JEE Main 2024 (01 Feb Shift 2)

Options

• A: ${\mathrm{NH}}_3$
• B: ${\mathrm{SbH}}_3$
• C: ${\mathrm{BiH}}_3$
• D: ${\mathrm{PH}}_3$

Question

Anomalous behaviour of oxygen is due to its 

JEE Main 2024 (29 Jan Shift 2)

Options

• A:  Large size and high electronegativity 
• B: Small size and low electronegativity 
• C: Small size and high electronegativity 
• D: Large size and low electronegativity

Question

Identify the incorrect statements about group 15 elements : (A) Dinitrogen is a diatomic gas which acts like an inert gas at room temperature. (B) The common oxidation states of these elements are \(-3,+3\) and +5 . (C) Nitrogen has unique ability to form \(\mathrm{p} \pi-\mathrm{p} \pi\) multiple bonds. (D) The stability of +5 oxidation states increases down the group. (E) Nitrogen shows a maximum covalency of 6. Choose the correct answer from the options given below :

JEE Main 2024 (08 Apr Shift 2)

Options

• A: (A), (C), (E) only
• B: (B), (D), (E) only
• C: (D) and (E) only
• D: (A), (B), (D) only

Question

Give below are two statements:

Statement-I : Noble gases have very high boiling points.

Statement-II: Noble gases are monoatomic gases. They are held together by strong dispersion forces. Because of this they are liquefied at very low temperature. Hence, they have very high boiling points.

In the light of the above statements. choose the correct answer from the options given below:

JEE Main 2024 (31 Jan Shift 1)

Options

• A: Statement I is false but Statement II is true
• B: Both Statement I and Statement II are true
• C: Statement I is true but Statement II is false
• D: Both Statement I and Statement II are false

Question

Choose the correct statements about the hydrides of group $15$ elements.
A. The stability of the hydrides decreases in the order ${\mathrm{NH}}_3>{\mathrm{PH}}_3>{\mathrm{AsH}}_3>{\mathrm{SbH}}_3>{\mathrm{BiH}}_3$
B. The reducing ability of the hydrides increases in the order ${\mathrm{NH}}_3<{\mathrm{PH}}_3<{\mathrm{AsH}}_3<{\mathrm{SbH}}_3<{\mathrm{BiH}}_3$
C. Among the hydrides, ${\mathrm{NH}}_3$ is strong reducing agent while ${\mathrm{BiH}}_3$ is mild reducing agent.
D. The basicity of the hydrides increases in the order ${\mathrm{NH}}_3<{\mathrm{PH}}_3<{\mathrm{AsH}}_3<{\mathrm{SbH}}_3<{\mathrm{BiH}}_3$

Choose the most appropriate from the option given below:

JEE Main 2024 (30 Jan Shift 2)

Options

• A: B and C only
• B: C and D only
• C: A and B only
• D: A and D only

Question

Given below are two statements:

Statement (I) : Oxygen being the first member of group $16$ exhibits only$–2$ oxidation state.

Statement (II) : Down the group $16$ stability of $+4$ oxidation state decreases and $+6$ oxidation state increases.

In the light of the above statements, choose the most appropriate answer from the options given below:

JEE Main 2024 (27 Jan Shift 2)

Options

• A: Statement I is correct but Statement II is incorrect 
• B: Both Statement I and Statement II are correct
• C: Both Statement I and Statement II are incorrect
• D: Statement I is incorrect but Statement II is correct

Question

From the given list, the number of compounds with $+4$oxidation state of Sulphur

${\mathrm{SO}}_3,{\mathrm{H}}_2{\mathrm{SO}}_3,{\mathrm{SOCl}}_2,{\mathrm{SF}}_4,{\mathrm{BaSO}}_4,{\mathrm{H}}_2 {\mathrm{S}}_2{\mathrm{O}}_7$

JEE Main 2024 (27 Jan Shift 1)

Enter your answer