NTA JEE Main 13th April 2023 Shift 1

The energy of an electron in the first Bohr orbit of hydrogen atom is $$-2.18 \times 10^{-18}$$ J. Its energy in the third Bohr orbit is _____.

Which of the following statements are not correct?
A. The electron gain enthalpy of F is more negative than that of Cl.
B. Ionization enthalpy decreases in a group of periodic table.
C. The electronegativity of an atom depends upon the atoms bonded to it.
D. Al$$_2$$O$$_3$$ and NO are examples of amphoteric oxides.
Choose the most appropriate answer from the options given below:

In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one?

ClF$$_5$$ at room temperature is a

Among the following compounds, the one which shows highest dipole moment is

Given below are two statements:
Statement I: Permutit process is more efficient compared to the synthetic resin method for the softening of water.
Statement II: Synthetic resin method results in the formation of soluble sodium salts.
In the light of the above statements, choose the most appropriate answer from the options given below:

Be(OH)$$_2$$ reacts with Sr(OH)$$_2$$ to yield an ionic salt. Choose the incorrect option related to this reaction from the following

In the following reaction 'X' is
CH$$_3$$(CH$$_2$$)$$_4$$CH$$_3$$ $$\xrightarrow{\text{Anhy. AlCl}_3 / \text{HCl}, \Delta}$$ X (major product)

The radical which mainly causes ozone depletion in the presence of UV radiations is :

What happens when a lyophilic sol is added to a lyophobic sol?