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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.

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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

 Differentiate between the following.

Filter Paper and Alum


Name the substance you will add to speed up sedimentation.


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Give one use of the following substance:
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Molecules can exist independently.


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__________ are chemicals formed on reaction of a base with an _____ giving salt and water.


Complete the statement given below by filling in the blank with the correct word.

The basic unit of an element is an __________.


Complete the statement given below by filling in the blanks with the correct words.
From the elements – He, Br, Pt, and O; the element which is metallic is ____, an inert element is ____, forms a triatomic molecule is ____, is liquid at room temperature is_ ___.


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From the elements nitrogen, chlorine, bromine, the element present in the atmosphere is ________.


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

A noble gas.


Match the separation of components in List I with the most appropriate process in List II.

List I List II
1. Naphthalene from naphthalene & sodium chloride. A: Separating funnel
2. Cream from milk. B: Sublimation
3. Kerosene oil from kerosene oil & water. C: Boiling 
4. Lead nitrate from an aqueous solution of lead nitrate. D: Centrifugation
5. Ammonia from an aqueous solution of ammonia. E: Distillation

Give a reason for the following statement :

The filter paper made into a cone & placed in a funnel for filtering out the solid particles in a solid-liquid mixture should be moistened before placing it.


Differentiate metals and non-metals.


Assertion: Air is a mixture of elements only.

Reason: Only nitrogen, oxygen and neon gases exist in air.


Elements contain the ______of the same kind.


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