390
Question
Write answers to the following
a. What is meant by radioactivity?
b. When is said to be the nucleus unstable?
c. Which diseases are caused by artificial food colours ?
d. Where in the industrial field is radioactivity used?
e. Write down properties of teflon.
f. What type of colours will you use to celebrate ecofriendly Rang Panchami? Why?
g. Why has the use of methods like Teflon coating become more common?
Write answers to the following
a. What is meant by radioactivity?
b. When is said to be the nucleus unstable?
c. Which diseases are caused by artificial food colours ?
d. Where in the industrial field is radioactivity used?
e. Write down properties of teflon.
f. What type of colours will you use to celebrate ecofriendly Rang Panchami? Why?
g. Why has the use of methods like Teflon coating become more common?
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Solution
a. The property of disintegration of an unstable atomic nucleus into a stable atomic nucleus, by the emission of radiations, is known as radioactivity.
b. Nucleus of certain elements such as uranium, thorium, radium have a property of spontaneously emitting invisible, highly penetrating and high energy radiation. The unstable nucleus of radioactive substances undergoes spontaneous decay by self emission of either alpha (), beta (), or gamma () radiations to form a more stable nucleus.
c. Cosumption of food with artificial food colours can result in the development of the diseases like ADHD (Attention Deficit Hyperactivity Disorder) which can affect children.
d. Radioactivity has various industrial application:
- It is used as a fuel in nuclear reactors to generate power.
- It is used in controlling the thickness of paper, plastic and metal sheets during their manufacturing.
- It is used in the manufacturing of luminescent paints and objects which show radioluminance. For example, substances such as radium, promethium etc. are used to make objects which glow in the dark like hands of clock. Similarly, krypton-85 is used in high intensity discharge lamps.
- Radioactive substances are used in ceramics, utensils, plates etc. to obtain luminous colours.
e. Teflon has the following properties:
- it is inert to the atmosphere and chemical substances
- both water and oil do not stick to the teflon coated articles
- it has a high melting point i.e. 3270 C which means there is no effect of high temperatures on it
- it is easier to clean teflon coated articles
f. We should use eco friendly colours for celebratind an ecio friendly Rang Panchami. These natural colours can be made from natural ingredients likebeet root, flowers of flame of forest, spinach, flame tree (gulmohar) etc. These are natural colours which do not pose any threat to our health or the environment. The synthetic/artificial colours which we use are a seriou threat to our health as they can lead to problems like blindness, skin cancer, asthma, itching of the skin, permanent blocking of sweat pores etc.
g. Teflon is a substance which is inert to chemicals, stable at higher temperatures, easy to clean and non stick. All these properties make it an ideal substance for coating.
a. The property of disintegration of an unstable atomic nucleus into a stable atomic nucleus, by the emission of radiations, is known as radioactivity.
b. Nucleus of certain elements such as uranium, thorium, radium have a property of spontaneously emitting invisible, highly penetrating and high energy radiation. The unstable nucleus of radioactive substances undergoes spontaneous decay by self emission of either alpha (), beta (), or gamma () radiations to form a more stable nucleus.
c. Cosumption of food with artificial food colours can result in the development of the diseases like ADHD (Attention Deficit Hyperactivity Disorder) which can affect children.
d. Radioactivity has various industrial application:
b. Nucleus of certain elements such as uranium, thorium, radium have a property of spontaneously emitting invisible, highly penetrating and high energy radiation. The unstable nucleus of radioactive substances undergoes spontaneous decay by self emission of either alpha (), beta (), or gamma () radiations to form a more stable nucleus.
c. Cosumption of food with artificial food colours can result in the development of the diseases like ADHD (Attention Deficit Hyperactivity Disorder) which can affect children.
d. Radioactivity has various industrial application:
- It is used as a fuel in nuclear reactors to generate power.
- It is used in controlling the thickness of paper, plastic and metal sheets during their manufacturing.
- It is used in the manufacturing of luminescent paints and objects which show radioluminance. For example, substances such as radium, promethium etc. are used to make objects which glow in the dark like hands of clock. Similarly, krypton-85 is used in high intensity discharge lamps.
- Radioactive substances are used in ceramics, utensils, plates etc. to obtain luminous colours.
- it is inert to the atmosphere and chemical substances
- both water and oil do not stick to the teflon coated articles
- it has a high melting point i.e. 3270 C which means there is no effect of high temperatures on it
- it is easier to clean teflon coated articles
g. Teflon is a substance which is inert to chemicals, stable at higher temperatures, easy to clean and non stick. All these properties make it an ideal substance for coating.
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