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प्रश्न
Fill in the blan
An ________ is a homogeneous mixture of two or more metals.
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उत्तर १
An alloy is a homogeneous mixture of two or more metals.
उत्तर २
An alloy is a homogeneous mixture of two or more metals.
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संबंधित प्रश्न
Name the substance you will add to speed up sedimentation.
Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.
Give two examples of the following.
Non-metals which are solids
Define: Molecule
Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.
Fill in the blank
The most abundant element in the atmosphere is _______.
Tick (√) the correct alternative from the choice given for the following statement.
Brass and bronze are
Write the names of elements from the following symbol:
Cu
Explain the difference between Metals and non-metals.
State four differences between – elements, compounds and mixtures with suitable examples.
Explain the term ‘mixture’.
Differentiate between homogenous & heterogeneous mixtures.
Give an example of two liquids that form heterogeneous mixtures.
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Select the correct answer from the choice given below to complete the sentence :
Compounds are ____________ in nature.
The first letter of an element is always written in ______ letter.
Higher Order Thinking Skills.
List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.
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 other than carbon that shows allotropy.
Complete the table:
| Element | Latin Name | Symbol |
| Mercury | ______ | Hg |
| Lead | Plumbum | ______ |
| Iron | ______ | Fe |
| Potassium | Kalium | ______ |
