Dual Nature of Radiation and Matter is an important topic in the Chemistry section in BITSAT exam. Practising this topic will increase your score overall and make your conceptual grip on BITSAT exam stronger.
This article gives you a full set of BITSAT PYQs for Dual Nature of Radiation and Matter with explanations for effective preparation. Practice of BITSAT Chemistry PYQs including Dual Nature of Radiation and Matter questions regularly will improve accuracy, speed, and confidence in the BITSAT 2026 exam.
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BITSAT PYQs for Dual Nature of Radiation and Matter with Solutions
1.
If enthalpies of formation of \( {C}_2{H}_4(g) \), \( {CO}_2(g) \) and \( {H}_2{O}(l) \) at 25°C and 1 atm pressure are 52, 394 and -286 kJ/mol respectively, the change in enthalpy for combustion of \( {C}_2{H}_4 \) is equal to:- -141.2 kJ/mol
- -1412 kJ/mol
- +14.2 kJ/mol
- +1412 kJ/mol
2.
A particle of mass \( m \) is projected with a velocity \( u \) making an angle of \( 30^\circ \) with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height \( h \) is:- \( \frac{\sqrt{3}}{16} \frac{m u^3}{g} \)
- \( \frac{\sqrt{3}}{2} \frac{m u^2}{g} \)
- \( \frac{m u^3}{\sqrt{2} g} \)
- zero
3.
Young's double slit experiment is performed in a medium of refractive index \( 1.33 \). The maximum intensity is \( I_0 \). The intensity at a point on the screen where the path difference between the light coming out from slits is \( \lambda/4 \), is:- \( 0 \)
- \( \frac{I_0}{2} \)
- \( \frac{3I_0}{8} \)
- \( \frac{2I_0}{3} \)
4.
A proton (\( p \)) and an electron (\( e \)) will have the same de-Broglie wavelength when the ratio of their momenta is
(Assume \( m_p = 1849 m_e \)):- \( 1:43 \)
- \( 43:1 \)
- \( 1:1849 \)
- \( 1:1 \)
5.
A 100m long wire having cross-sectional area \( 6.25 \times 10^{-4} \, {m}^2 \) and Young's modulus is \( 10^{10} \, {Nm}^{-2} \) is subjected to a load of 250N, then the elongation in the wire will be:- \( 6.25 \times 10^{-3} \, {m} \)
- \( 4 \times 10^{-4} \, {m} \)
- \( 6.25 \times 10^{-6} \, {m} \)
- \( 4 \times 10^{-3} \, {m} \)
6.
The probability density plots of 1s and 2s orbitals are given in figure.
The density of dots in a region represents the probability density of finding electrons in the region. On the basis of the above diagram, which of the following statements is incorrect?
- 1s and 2s orbitals are spherical in shape.
- The probability of finding the electron is maximum near the nucleus.
- The probability of finding the electron at a given distance is equal in all directions.
- The probability density of electrons for 2s orbital decreases uniformly as distance from the nucleus increases.
7.
A dust particle of mass \(4 \times 10^{-12} \, {mg}\) is suspended in air under the influence of an electric field of 50 N/C directed vertically upwards. How many electrons were removed from the neutral dust particle? [Take, \(g = 10 \, {m/s}^2\)]- 15
- 8
- 5
- 4
8.
Which of the following will precipitate first when an aqueous solution containing sulphate ions is added?- \( {Mg}^{2+} \)
- \( {Ca}^{2+} \)
- \( {Sr}^{2+} \)
- \( {Ba}^{2+} \)
9.
How much ethyl alcohol must be added to 1 litre of water so that the solution will freeze at \(-14^\circ \text{C}\)?
(Kf for water = 1.86 °C/mol)
- 7.5 mol
- 8.5 mol
- 9.5 mol
- 10.5 mol
10.
Among the given halides, which one will give the same product in both S\(_N1\) and S\(_N2\) reactions?
- (III) only
- (I) and (II)
- (III) and (IV)
- (I), (III), and (IV)
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