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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Select the Correct Answer to the Statement Given Below: a Compound Containing Carbon, Oxygen and Calcium. - Chemistry

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प्रश्न

Select the correct answer to the statement given below:

A compound containing carbon, oxygen and calcium.

विकल्प

  • Chalk

  • Oxygen

  • Silicon

  • Bromine

  • Nitrous oxide

MCQ
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उत्तर

Chalk

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Elements, Compounds and Mixtures - Objective Type Questions

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विराफ जे दलाल New Simplified Middle School Chemistry [English] Class 7
अध्याय 3 Elements, Compounds and Mixtures
Objective Type Questions | Q 1.3

संबंधित प्रश्न

Give Two Examples for Each of the Following: Metalloids


Differentiate between:

Homogenous and heterogenous substances


State four differences between compounds and mixtures.


Give two examples of  Noble gases.


Give three differences between metals and non-metals.


What is meant by 2H and H2


State the number of atoms of each element, present in \[\ce{HNO3}\].

Also name the compound.


Give one use of the following substance:
Brass


Answer the following question:
Why are copper and aluminium used to make electric wires?


Match the Columns:

  Column A   Column B
(a) Metals (i) Non-Reactive
(b) Molecules (ii) Brittle
(c) Non-Metals (iii) Lustrous
(d) Noble Gases (iv) Smallest unit of Compound

 


Indicate whether the following statement is true or false:
Metals can be polished.


Tick (√) the correct alternative from the choice given for the following statement

The most ductile metal.


Give the name of the radical - SO4


Complete the statement with the correct words.
Acid’s are chemicals which are _____ in taste and derived from plants and ________.


Select the correct answer from the choice in the bracket.

The positively charged particle of an atom.


Select the correct answer from A, B, C, D & E for the statement given below :

A mixture consisting of elements & a compound.


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 :

Dust in air is an example of _________ mixture.


Classify the following as elements and compounds.

Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium


Higher-Order Thinking questions:

Why is hydrogen considered an element?


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