Lustre : Almost all non- metals have a dull surface. As most of them occur as powders and gases, they cannot be polished like metals. Graphite and iodine do show some luster.
Color: Some non- metals are colourless while some are coloured. For example, chlorine is a greenish- yellow gas, bromine is a brown liquid, iodine is a violet solid, and oxygen and nitrogen are colorless gases.
Non-Metals are Not Lustrous. They are Dull. This means that non-metals are not shiny, shiny, they are dull in appearance.
For example, sulphur and phosphorus are solid non-metals which do not have lustre (or shine). They are dull in appearance. There is, however, one exception. Iodine is non-metal having lustre (or chamak). Iodine has a shining surface like that of metals.
Which of the following are correct : (a) Chlorine is a greenish- yellow gas and bromine is a brown liquid. (b) Non-metals are not shiny, they are dull in appearance. | |||
Right Option : C | |||
View Explanation |
Non metal which is solid in appearance is ______________________. | |||
Right Option : D | |||
View Explanation |
________________________ metal is violet solid in appearance. | |||
Right Option : C | |||
View Explanation |
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
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It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
My experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.