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प्रश्न
The elements which normally exist in the liquid state are :
पर्याय
bromine and iodine
mercury and chlorine
iodine and mercury
bromine and mercury
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उत्तर
bromine and iodine
Mercury is a metal that exists in liquid state and bromine is a non-metal that exists in liquid state.
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संबंधित प्रश्न
Differentiate between an atom and a molecule.
Fill in the blank
All matter is made up of tiny particles called ______
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Name a non-metal which is a good conductor of electricity.
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
State two physical properties on the basis of which metals can be distinguished from non-metals.
Draw a flow-chart for the schematic representation of different types of matter.
A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.
Name the process which can be used to recover salt from an aqueous salt solution.
How will you separate a mixture containing sand and sugar ?
How would you separate iodine from a mixture of iodine and common salt ?
How will you separate iron pins from sand ?
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
Which among the following is not a matter?
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
The physical state of water at 373 K is ______.
Atoms are tiny particles that repel each other when they are squeezed very close.
Define the term matter.
Define the term matter.
