TN State Board 10th Science Question Paper 2024

The reaction in option C is not an element + element → compound type reaction because CO is a compound, not an element. Here, a compound reacts with oxygen to form another compound. Options A, B, and D are all combinations of two elements forming a compound.

Cancer of epithelial cells is called carcinoma. Leukaemia is cancer of blood-forming tissues, sarcoma arises from connective tissues, and lipoma is a benign tumour of fat tissue.

The coefficient of apparent expansion is the apparent increase in volume of a liquid per unit original volume per degree rise in temperature. It is given by $$\gamma_a = \frac{\text{apparent increase in volume}}{V_0\,\Delta T}$$ where $V_0$ is the original volume and $\Delta T$ is the rise in temperature.

Tungsten is used in bulbs because it has a very high melting point and can withstand the high temperature produced when current passes through it. It is not used as fuse wire because a fuse wire should have a low melting point so that it melts quickly and breaks the circuit during excess current.

Any three features of natural and artificial radioactivity are: 1. Natural radioactivity is a spontaneous process, whereas artificial radioactivity is induced by bombarding a stable nucleus with suitable particles. 2. In both natural and artificial radioactivity, unstable nuclei emit alpha, beta, or gamma radiations to become more stable. 3. Both processes are nuclear phenomena and are not affected by physical or chemical changes such as temperature, pressure, or chemical combination. 4. Natural radioactivity occurs in naturally occurring elements like uranium and radium, while artificial radioactivity is produced in the laboratory.