मराठी

Correct the Following Statement: Co and Co Both Represents Cobalt.

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प्रश्न

Correct the following statement:

CO and Co  both represents cobalt.

एका वाक्यात उत्तर
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उत्तर

CO is a Carbon monoxide and Co is an element named Cobalt.

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पाठ 1: The Language of Chemistry - Exercise 1 (C) [पृष्ठ १९]

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सेलिना Concise Chemistry [English] Class 9 ICSE
पाठ 1 The Language of Chemistry
Exercise 1 (C) | Q 11.4 | पृष्ठ १९

संबंधित प्रश्‍न

Is food that we eat a mixture ?


What is the difference between a pure substance and a mixture ?


Define: Compounds


Name: an Inert Gas


Give one use of the following substance:

Brass


Give one use of the following substance:
Coal


Fill in the blank
The most abundant element in the atmosphere is  _______.


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


Give the name of the radical - NO3


Complete the statement given below by filling in the blank with the correct word.
Element ______ has the symbol derived from its Latin name ‘Argentum’


Match the compounds in List I – 1 to 20 with their correct formulas from in List II-A to T.

  List I   List II
1 Hydrochloric acid A NaCI
2 Potassium Hydroxide B NaOH
3 Sulphuric Acid C KCI
4 Zinc Hydroxide D Ca(OH)2
5 Sodium Chloride E CaS
6 Nitric Acid F CuSO4
7 Calcium Hydroxide G CaCO3
8 Carbonic Acid H NH4CI
9 Sodium hydroxide I HCI
10 Copper sulphate J ZnO
11 Potassium Chloride K HNO3
12 Calcium Carbonate L H2CO3
13 Magnesium Sulphide M MgS
14 Zinc Sulphate N MgO
15 aluminium Hydroxide O KOH
16 Sodium Carbonate P ZnSO4
17 Calcium Sulphide Q Na2CO3
18 Magnesium Oxide R H2SO4
19 Zinc Oxide S AI(OH)3
20 Ammonium Chloride T Zn(OH)2

 


Represent with the help of a simple chart how matter is classified into pure or impure substances & further into elements, compounds & mixtures, with elements further segmented.


Give an example of two liquids that form 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.

Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.


Differentiate metals and non-metals.


Match the following.

Atom Building block of matter
Element Atoms of different kinds
Compound Atoms of the same kind
Molecule Smallest unit of a substance

Why are utensils made up of aluminium and brass?


______ is a mixture of gases.


Give the chemical formula for cane sugar.


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