Exercise
NCERT Science Solutions for Exercise
Simple step-by-step solutions to Exercise questions of Life Processes from Science Textbook of Competency Based Questions for Class X. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from Exercise with Hints & Solutions
How cake becomes fluffy?
Which of the following salts is not soluble in cold water?
The beautiful ceiling design is intricately made now a days as an ornamentation of the mansions. These are made by plaster of Paris- a salt that is made from gypsum. Not only in modern days, Plaster of Paris is used since ancient times. Plaster of Paris was first made ago and has been used by Ancient Egypt, Greek and Roman civilizations.
In , a fire raged across London, destroying many parts of it. After the investigation, the king of France ordered that all the walls made of wood in Paris be covered with Plaster. This resulted in the large-scale mining of gypsum which was available around Paris in huge amounts. Thus, Paris became the centre of Plaster production and the compound was commonly called as called Plaster of Paris (POP).
Gypsum is a dihydrated salt of calcium that on heating converts into a hemihydrated salt of calcium which is known as POP.
What is the correct combination for the chemical representation of POP and its property that has been analysed by the king of France?
Small hair-like structures line the upper part of the human respiratory tract. These structures trap the dust particles, germs and chemicals entering the human body during breathing.
Smoking is likely to cause infections in the respiratory tract.
Which statement best explains the fact?
Read the following two statements and answer the question.
Gatroparesis is a disease in which the muscles of the stomach become paralysed and cannot contract or relax.
Foods high in fat can delay the process of digestion and the emptying of the stomach.
Which of the following food would be advised to a patient suffering from Gastroparesis?
A major portion of the carbohydrates produced by plants is stored in different parts of the plant (storage organs). Explain the mechanism by which this stored food is made available when different organs need it for growth.
There are various muscles present in the human digestive system known as sphincters. Two examples of those are given below:
1. Pyloric sphincter- at the junction of the stomach and small intestine.
2. Anal sphincter- at the anus.
Give ONE most likely consequence of malfunctioning of each of these sphincters?
The below diagram shows the respiratory system of human beings.
Identify the correct function of the part labelled as 'X'.
