Hydrogen bonding and metallic bonding — practice questions

Question 1 · difficulty L2 · understanding

Number of molecules from the following which can exhibit hydrogen bonding is _________. (nearest integer)

Question 2 · difficulty L2 · understanding

In an ice crystal, each water molecule is hydrogen bonded to ____________ neighbouring molecules.

Question 3 · difficulty L2 · understanding

The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO 4 .5H 2 O is ____________.

Question 4 · difficulty L2 · understanding

Given below are two statements: Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes. Statement II : Intermolecular hydrogen bonding with water molecule is more in nylon-based clothes than in the case of cotton clothes. In the light of above statements, choose the correct answer from the options given below

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

Question 5 · difficulty L2 · understanding

Given below are two statements: one is labelled as Assertion (A ) and the other is labelled as Reason (R) . Assertion (A) : $\mathrm{PH}_3$ has lower boiling point than $\mathrm{NH}_3$. Reason (R) : In liquid state $\mathrm{NH}_3$ molecules are associated through vander Waal's forces, but $\mathrm{PH}_3$ molecules are associated through hydrogen bonding. In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. (A) is not correct but (R) is correct
• C. (A) is correct but (R) is not correct
• D. Both $(\mathbf{A})$ and $(\mathbf{R})$ are correct but $(\mathbf{R})$ is not the correct explanation of $(\mathbf{A})$

Question 6 · difficulty L2 · understanding

Decreasing order of the hydrogen bonding in following forms of water is correctly represented by A. Liquid water B. Ice C. Impure water Choose the correct answer from the options given below :

• A. A = B > C
• B. B > A > C
• C. A > B > C
• D. C > B > A

Question 7 · difficulty L2 · understanding

The correct order of increasing intermolecular hydrogen bond strength is :

• A. HCN < H 2 O < NH 3
• B. HCN < CH 4 < NH 3
• C. CH 4 < HCN < NH 3
• D. CH 4 < NH 3 < HCN

Question 8 · difficulty L3 · understanding

Consider the following reactions The number of protons that do not involve in hydrogen bonding in the product B is _________.

Question 9 · difficulty L3 · understanding

The correct statement/s about Hydrogen bonding is/are A. Hydrogen bonding exists when H is covalently bonded to the highly electro negative atom. B. Intermolecular H bonding is present in $$o$$-nitro phenol C. Intramolecular $$\mathrm{H}$$ bonding is present in HF. D. The magnitude of $$\mathrm{H}$$ bonding depends on the physical state of the compound. E. H-bonding has powerful effect on the structure and properties of compounds Choose the correct answer from the options given below:

• A. A, B, C only
• B. A only
• C. A, D, E only
• D. A, B, D only

Question 10 · difficulty L3 · understanding

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation. Reason R : Fluorine is the most electronegative element and hydrogen bonds in HF are symmetrical. In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Both A and R are true and R is the correct explanation of A
• B. A is true but R is false
• C. A is false but R is true
• D. Both A and R are true but R is NOT the correct explanation of A