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Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines is the emission spectra will be

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Statement-1 : Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion and Statement-II: For heavy nuclei, binding energy per nucleon increases with increasing Z while for light nuclei it decrease with increasing Z

For the following three reactions a, b and c, equilibrium constants are given: a. \displaystyle{C}{O}{\left({g}\right)}+{H}_{{{2}}}{O}{\left({g}\right)}\Leftrightarrow{C}{O}_{{{2}}}{\left({g}\right)}+{H}_{{{2}}}{\left({g}\right)},{K}_{}

Given $P(x)=x_{4}+ax_{3}+cx+d$such that $x=0$is the only real root of \displaystyle{P}'{\left({x}\right)}\text{}=\text{}{0}.\text{}{I}{f}\text{}{P}

Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, the main reason being

If p and q are positive real numbers such that $p_{2}+q_{2}=1$, then the maximum value of $(p+q)$ is

The vapour pressure of water at $20_{2}C$ is 17.5 mm Hf. If 18 g of glucose $(C_{6}H_{12}O_{6})$ is added to 178.2 g of water at $20_{∘}C$, the vapour pressure of the resulting solution will be

Amount of oxalic acid present in a solution can be determined by its titration with $KMnO_{4}$ solution in the presence of $H_{2}SO_{4}$. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl

If the straight lines $kx−1 =2y−2 =3z−3 $ and $3x−2 =ky−3 =2z−1 $intersect at a point, then the integer k is equal to