SSLC (English Medium) इयत्ता १० - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Why does an empty vessel produce more sound than a filled one?

Mention two cases in which there is no Doppler effect in sound?

Two observers are stationed in two boats 4.5 km apart. A sound signal sent by one, under water, reaches the other after 3 seconds. What is the speed of sound in the water?

Name three animals which can hear ultrasonic vibrations.

Suppose that a sound wave and a light wave have the same frequency, then which one has a longer wavelength?

Unit of radioactivity is _______

Which of the following statements is/are correct?

1. α particles are photons
2. Penetrating power of γ radiation is very low
3. Ionization power is maximum for α rays
4. Penetrating power of γ radiation is very high

₈₈Ra²²⁶ experiences three α - decay. Find the number of neutrons in the daughter element.

Match the following

Planting trees increases the groundwater level.

The volume occupied by 4.4 g of CO₂ at S.T.P ______

The volume occupied by 1 mole of a diatomic gas at S.T.P is ______

In the nucleus of `""_20"Ca"^40`, there are ______

Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars. 

Atoms of different elements having the same number of ______ are called isotones.

Atoms of one element can be transmuted into atoms of other elements by ______

The number of atoms present in a molecule is called its ______.

1 mole of Gold and Silver contain same number of atoms.

Give the salient features of “Modern atomic theory”.

The number of periods and groups in the periodic table are ______