NTA JEE Main 8th April 2019 Shift 1

The quantum number of four electrons are given below:
I. $$n = 4, l = 2, m_l = -2, m_s = -1/2$$
II. $$n = 3, l = 2, m_l = 1, m_s = +1/2$$
III. $$n = 4, l = 1, m_l = 0, m_s = +1/2$$
IV. $$n = 3, l = 1, m_l = 1, m_s = -1/2$$
The correct order of their increasing energies will be:

The size of the iso-electronic species Cl$$^{-}$$, Ar and Ca$$^{2+}$$ is affected by:

Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas? (Assume non-expansion work is zero)

For silver, $$C_p$$ (J K$$^{-1}$$ mol$$^{-1}$$) = 23 + 0.01T. If the temperature T of 3 moles of silver is raised from 300 K to 1000 K at 1 atm pressure, the value of $$\Delta H$$ will be close to:

If solubility product of Zr$$_3$$(PO$$_4$$)$$_4$$ is denoted by K$$_{sp}$$ and its molar solubility is denoted by S, then which of the following relation between S and K$$_{sp}$$ is correct?

In order to oxidize a mixture of one mole of each of FeC$$_2$$O$$_4$$, Fe$$_2$$(C$$_2$$O$$_4$$)$$_3$$, FeSO$$_4$$ and Fe$$_2$$(SO$$_4$$)$$_3$$ in acidic medium, the number of moles of KMnO$$_4$$ is:

Given that,
$$E^{0}_{O_2/H_2O} = +1.23$$ V;
$$E^{0}_{S_2O_8^{2-}/SO_4^{2-}} = 2.05$$ V;
$$E^{0}_{Br_2/Br^{-}} = +1.09$$ V;
$$E^{0}_{Au^{3+}/Au} = 1.4$$ V

The strongest oxidizing agent is:

100 mL of a water sample contains 0.81 g of calcium bicarbonate and 0.73 g of magnesium bicarbonate. The hardness of this water sample expressed in terms of equivalents of CaCO$$_3$$ is: (molar mass of calcium bicarbonate is 162 g mol$$^{-1}$$ and magnesium bicarbonate is 146 g mol$$^{-1}$$)

The correct order of hydration enthalpies of alkali metal ions is:

Diborane B$$_2$$H$$_6$$ reacts independently with O$$_2$$ and H$$_2$$O to produce, respectively: