Advertisements
Advertisements
Question
The three important metalloids are.............................. and ..........................
Advertisements
Solution
The three important metalloids are boron, silicon, and germanium.
APPEARS IN
RELATED QUESTIONS
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
Solids have definite shape and definite volume.
Name the processes involved in two cases.
Differentiate between an atom and a molecule.
Name the terms for the change of a solid into liquid.
What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain during Brownian motion.
What is meant by saying that non-metals are brittle ?
What elements do the following compounds contain ?
Sugar, Common salt
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
How will you differentiate between a suspension and a colloid ?
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Which of the following is not an emulsion ?
One of the following represents the solution of solid in a solid. This one is :
Explain how, impure copper sulphate can be purified by crystallisation.
The best way to recover sugar from an aqueous sugar solution is :
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Rusting of an article made up of iron is called
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
Define the term matter.
