Longitudinal and Transverse Waves — Prelims Questions

Which of the following statements is INCORRECT regarding longitudinal and transverse waves?

A wave travels at a speed of $300,\text{m/s}$ in a medium. If its frequency is $150,\text{Hz}$, what is its wavelength?

A wave passes from a rarer medium to a denser medium. Which of the following quantities remains unchanged?

Which of the following is an example of a transverse wave that does NOT require a material medium for its propagation?

A transverse wave is propagating in the positive x-direction. If the particles of the medium are oscillating in the y-z plane, which of the following statements is true?

A sound wave has a frequency of $200,\text{Hz}$ and travels in a medium where its wavelength is $1.7,\text{m}$. If this sound wave enters a new medium where its speed becomes $425,\text{m/s}$, what will be its new wavelength?