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Which of the Following Are Not Compounds ? Chlorine Gas, Potassium Chloride, Iron Powder, Iron Sulphide, Aluminium Foil, Iodine Vapour, - Science

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प्रश्न

Which of the following are not compounds ?

Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond

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उत्तर

Chlorine gas, iron powder, iodine vapour and sulphur powder. aluminum foil, graphite and diamond are not compounds.

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अध्याय 2: Is Matter Around Us Pure - Very Short Answers [पृष्ठ ५८]

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लखमीर सिंग Chemistry [English] Class 9
अध्याय 2 Is Matter Around Us Pure
Very Short Answers | Q 50 | पृष्ठ ५८

वीडियो ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्न

The molecules can move freely anywhere in


Fill in the blank :

The state of matter with definite volume and definite shape is called______


Fill in the blank

Any matter which has a definite _______ but no definite shape is called a _______


Fill in the blank

All matter is made up of tiny particles called ______


When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.

  1. What could particles X be ?
  2. What do you think liquid Y is ?
  3. What is the zig-zag movement of X known as ?
  4. What is causing the zig-zag movement of particles X ?
  5. Name the scientist who discovered this phenomenon.
  6. What does this experiment tell us about the nature of liquid Y?

Fill in the following blanks with suitable words :

An element is made up of only one kind of ........


What are the three general classes of matter ? Give one example of each type.


State whether the following statement is true or false :

Sponge is an example of solid sol.


Which of the following will show Tyndall effect ? Why ?

  1. Salt solution
  2. Starch solution
  3. Milk
  4. Copper sulphate solution

Fill in the following blanks with suitable words :

A mixture of kerosene and petrol can be separated by .....................


How would you separate iodine from a mixture of iodine and common salt ?


Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.


With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.


The dyes present in fountain pen ink can be separated by the technique of :


The best way to recover sugar from an aqueous sugar solution is :


One of the following does not undergo sublimation. This one is :


The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :

(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?

(b) Which component will be collected from the top part of the fractional distillation column ? Why ?

(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?

(d) What could the component X, Y and Z be ?


What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?


Which among the following ______ will get attracted to by magnet?


Complete the following table:

S.No. CELSIUS KELVIN
1. 90°C 363 K
2. ______ 283 K
3. 63 °C ______
4. 250°C ______
5. ______ 303 K

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