NEET Chemistry 2

Question 1

Which of the following has the highest lattice energy?

Accepted Answer

MgO

Answer

MgO has the highest lattice energy due to small ionic radii and high charges (2+ and 2−) of Mg²⁺ and O²⁻.

Question 2

The IUPAC name of CH₃–CH(OH)–CH₂–CHO is:

Accepted Answer

3-hydroxybutanal

Answer

The parent chain is butanal with an –OH group on C-3, giving the name 3-hydroxybutanal.

Question 3

Which quantum number determines the shape of an orbital?

Accepted Answer

Azimuthal quantum number (l)

Answer

The azimuthal (angular momentum) quantum number l determines the shape of atomic orbitals.

Question 4

In the reaction between Na₂S₂O₃ and I₂, the equivalent weight of Na₂S₂O₃ is:

Accepted Answer

M (molecular weight)

Answer

In the reaction 2Na₂S₂O₃ + I₂ → Na₂S₄O₆ + 2NaI, each S changes oxidation state by 1, so n-factor = 1 and equivalent weight = M.

Question 5

Which of the following polymers is used in making bulletproof vests?

Accepted Answer

Kevlar

Answer

Kevlar is an aromatic polyamide with exceptional tensile strength, used in bulletproof vests.

NEET - National Eligibility cum Entrance Test Practice Test