NEET (UG) entrance exam Question Bank Solutions for Chemistry

Some of the polar crystals when heated produces small electrical current. This phenomenon is called ______.

If the atomic mass unit ‘u’ were defined to be `1/5 "th"` of the mass of an atom of C-12, what would be the atomic weight of nitrogen in amu or ‘u’ in this state? Atomic weight of N on the conventional scale is 14.

Write the IUPAC name of the following compound.

During preparation of ice-cream gelatin is added in ice-creams. What could be the role of gelatin in the process?

Which of the following statements are correct?

1. The hybridisation found in cation of solid PCl5 is sp³.
2. In AB₂L₂ type, the BAB bond angle is always greater than the normal tetrahedral bond angle.
3. In \[\ce{ClO^{-}_3}\] NH₃ and XeO₃, the hybridisation and the number of lone pairs on the central atoms are same.
4. In· discrete P₄ molecule, there are six P—P bonds and four lone pairs of electrons.

For the irreversible expansion of an ideal gas under isothermal conditions, the correct option is ______.

The modem atomic mass scale is based on ______.

Isopropyl methyl ether when treated with hydrogen iodide gives ______.

In which of the following molecule does the central atom have two p-orbitals unused?

Which of the following is NOT correct?

An organic compound 'X' (molecular formula C₆H₇O₂N) has six carbons in a ring system, two double bonds and also a nitro group as a substituent, 'X' is ______. 

The total number of orbitals in a shell with the principal quantum number n is ______.

The number ratio of σ and π bonds in benzene is ______. 

The following is a method to determine the surface tension of liquids:

For the reaction, \[\ce{X2O_{4(l)} -> 2XO_{2(g)}}\] ΔU = 2.1 kcal, ΔS = 20 cal K^–1 at 300 K Hence: ΔG is:

Mark the incorrect statement from the following:

A mixture of benzaldehyde and formaldehyde on heating with 50% NaOH solution gives

Diethyl ether finds use in medicine as ______.

The second law of thermodynamics states that ______.

Acidity of BF₃ can be explained on the basis of which of the following concepts?