NTA JEE Mains 22nd Jan 2025 Shift 2

The compound with molecular formula $$C_{6}H_{6}$$, which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has ________ electrons.

20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration of the solution is _______ $$\times 10^{-2}M$$.(Nearest integer)

Consider the following cases of standard enthalpy of reaction ($$\Delta H_{r}^{\circ}$$ in kJ $$mol^{-1}$$)
$$C_{2}H_{6}(g)+\frac{7}{2}O_{2}(g) \rightarrow 2CO_{2}(g)+3H_{2}O(1)\Delta H_{1}^{\circ}=-1550$$
$$C(graphite)+O_{2}(g)\rightarrow CO_{2}(g)$$ $$\Delta H_{2}^{\circ}=-393.5$$ The magnitude of $$\Delta H_{fC_{2}H_{6}(g)}^{\circ}$$ is_______
$$H_{2}(g)+\frac{1}{2}O_{2}(g)\rightarrow H_{2}O(1)$$ $$\Delta H_{3}^{\circ}=-286$$
$$kJ mol^{-1}$$ (Nearest integer).

Niobium ( Nb ) and ruthenium (Ru) have "x" and "y" number of electrons in their respective 4 d orbitals The value of x+y is _______.

The complex of $$Ni^{2+}$$ ion and dimethyl glyoxime contains ________ number of Hydrogen (H) atoms.