Question

1. Write a short note on hydrotropism.
2. Solid sodium chloride does not conduct electricity whereas molten sodium chloride
conducts electricity. Explain.
3. Write the chemical properties of metals. (Any 2)
4. Write the physical properties and use of ethanol.
5. What is eterification?​

Answer 1

Answer:

1.Hydrotropism (hydro- "water"; tropism "involuntary orientation by an organism, that involves turning or curving as a positive or negative response to a stimulus")[1] is a plant's growth response in which the direction of growth is determined by a stimulus or gradient in water concentration. A common example is a plant root growing in humid air bending toward a higher relative humidity level.

Explanation:

This is of biological significance as it helps to increase efficiency of the plant in its ecosystem.

The process of hydrotropism is started by the root cap sensing water and sending a signal to the elongating part of the root. Hydrotropism is difficult to observe in underground roots, since the roots are not readily observable, and root gravitropism is usually more influential than root hydrotropism.[2] Water readily moves in soil and soil water content is constantly changing so any gradients in soil moisture are not stable. Hydrotropism may have importance for plants grown in space, where it may allow roots to orient themselves in a microgravity environment.

Answer 2

Answer:

1.Hydrotropism is a plant growth response in which the direction of growth is determined by a stimulus gradient in water concentration a common example is a plant root growing in humid air bending towards higher relative humidity level.