AIPMT 2005 | Atoms and Nuclei Question 94 | Physics

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AIPMT 2005

MCQ (Single Correct Answer)

-1

Out of Syllabus

Which one of the following pairs of nuclei are isotones ?

₃₄Se⁷⁴, ₃₁Ga⁷¹

₃₈Sr⁸⁴, ₃₈Sr⁸⁶

₄₂Mo⁹², ₄₀Zr⁹²

₂₀Ca⁴⁰, ₁₆S³²

AIPMT 2005

MCQ (Single Correct Answer)

-1

In the reaction $${}_1^2$$H + $${}_1^3$$H $$ \to $$ $${}_2^4$$He + $${}_0^1$$n, if the binding
energies of $${}_1^2$$ H, $${}_1^3$$H and $${}_2^4$$He are respectively a, b and c (in MeV),
then the energy (in MeV) released in this reaction is

a + b + c

a + b $$-$$ c

c $$-$$ a $$-$$ b

c + a $$-$$ b

AIPMT 2005

MCQ (Single Correct Answer)

-1

The total energy of an electron in the first excited state of hydrogen atom is about $$-$$ 3.4 eV. Its kinetic energy in this state is

3.4 eV

6.8 eV

$$-$$ 3.4 eV

$$-$$ 6.8 eV

AIPMT 2005

MCQ (Single Correct Answer)

-1

Energy levels A, B and C of a certain atom corresponding to increasing values of energy i.e. E_A < E_B < E_C. If $$\lambda $$₁, $$\lambda $$₂ and $$\lambda $$₃ are wavelengths of radioations corresponding to transitions C to B, B to A and C to A respectively, which of the following relations is correct?

$${\lambda _3} = {\lambda _1} + {\lambda _2}$$

$${\lambda _3} = {{{\lambda _1}{\lambda _2}} \over {{\lambda _1} + {\lambda _2}}}$$

$${\lambda _1} + {\lambda _2} + {\lambda _3} = 0$$

$${\lambda _3}^2 = {\lambda _1}^2 + {\lambda _2}^2$$

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