Rutherford's Model

Q. 31 Calculate the standard free energy change for the reaction 4 NH3 (g) + 5O2 (g) 4NO (g) + 6 H2O (l) Given that the free energy change for the formation of NH3 (g), NO (g) and H2O (l) are -16.8, +86.7 and -273.2 kJ/mole respectively. Predict the feasibility of the reaction.

Q.

When X-rays are projected in strong magnetic field it will:-

1. deflect right.

2. deflect left.

3. move in opposite direction to magnetic field

4. not deflect

Q.

WHAT ARE THE ELEMENTARY PARTICLES OF SHORT LIFE TIMES?

Q. A decay is given by ${}_{15}^{32}P{⟶}_{16}^{32}S+A+B$, then A & B are

1. ${\beta }^{-1}$, gamma particle
2. ${\beta }^{-1},\overrightarrow{v}$ (antineutrino)
3. $\alpha ,\overrightarrow{v}$ (antineutrino)
4. ${\beta }^{-1},v$ (neutrino)

Q. A hydrogen atom in ground state absorbs $10.2\text{eV}$ of energy. The orbital angular momentum of the electron is increased by

1. $3.16\times {10}^{-34}\text{Js}$
2. $1.05\times {10}^{-34}\text{Js}$
3. $2.11\times {10}^{-34}\text{Js}$
4. $4.22\times {10}^{-34}\text{Js}$