SSLC (English Medium) Class 10 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

A whistle giving out a sound of frequency 450 Hz, approaches a stationary observer at a speed of 33 ms^–1. The frequency heard by the observer is (speed of sound = 330 ms^–1) ______.

What is the audible range of frequency?

What will be the frequency sound having 0.20 m as its wavelength, when it travels with a speed of 331 ms^–1?

A sound wave has a frequency of 200 Hz and a speed of 400 ms^–1 in a medium. Find the wavelength of the sound wave.

A person who is sitting at a distance of 400 m from a source of sound is listening to a sound of 600 Hz. Find the time period between successive compressions from the source?

_______ isotope is used for the treatment of cancer.

Increasing crops : Radio phosphorous, Effective functioning of heart : _____

Which radioactive material is present in the ore of pitchblende?

Write any two elements which are used for inducing radioactivity?

Which hazardous radiation is the cause for genetic disease?

What is the amount of radiation that may cause the death of a person when exposed to it?

Write any three features of natural and artificial radioactivity.

Define one roentgen.

State Soddy and Fajan’s displacement law.

Give any two uses of radio isotopes in the field of agriculture?

'X – rays should not be taken often'. Give the reason.

Higher Order Thinking Skill (HOT)

Although coal and petroleum are produced by degradation of biomass, yet we need to conserve them. Why?

A is a reddish-brown metal, which combines with O₂ at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.

Why does the reaction rate of a reaction increase on raising the temperature?

Explain the factors influencing the rate of a reaction.