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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Select the Correct Answer to the Statement Given Below: the Chemical Name for Dinitrogen Oxide N20. - Chemistry

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प्रश्न

Select the correct answer to the statement given below:

The chemical name for dinitrogen oxide [N20].

पर्याय

  • Chalk

  • Oxygen

  • Silicon

  • Bromine

  • Nitrous oxide

MCQ
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उत्तर

Nitrous oxide

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पाठ 3: Elements, Compounds and Mixtures - Objective Type Questions

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विराफ जे. दलाल New Simplified Middle School Chemistry [English] Class 7
पाठ 3 Elements, Compounds and Mixtures
Objective Type Questions | Q 1.2

संबंधित प्रश्‍न

Is food that we eat a mixture ?


Name: a Liquid Non-metal


Give two examples of  Metalloids.


Give three differences between metals and non-metals.


Give two examples of the following.
Inert gases


Define: Formula


Give one use of the following substance:
Coal


Give reason: A frying pan is made up of steel but its handle is made up of wood.


Answer the following question:
When iron is mixed with sulphur at room temperature, it does not form a compound. Why?


Indicate whether the following statement is true or false:
Noble gases are high reactive


Classify substances into pure and impure substances in the form of a chart or tabulation.


Write the names of elements from the following symbol:

Zn


‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.


Differentiate between homogenous & heterogeneous mixtures.


The diagram represents fractional distillation for the separation of mixtures. Answer the following :

  1. Can two immiscible liquids be separated by this process?
  2. Separation of liquids by this process is based on which physical property?
  3. If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
  4. Give a reason for the above answer.
  5. State the purpose of the fractionating column in the apparatus.

Select the correct answer from the choice given below to complete the sentence :

An example of a monoatomic molecule is ___________.


Why are utensils made up of aluminium and brass?


Match the following.

1. Element Made up of molecules
2. Compound Impure substance
3. Colloid Settles down on standing
4. Suspension Pure substance
5. Mixture Made up of atoms

Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?


Name the element which is used for making computer chips.


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