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प्रश्न
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Vinegar
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उत्तर
Acetic acid (Vinegar) — CH3COOH
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संबंधित प्रश्न
Match the columns.
| column A | column B |
|
1. to separate grain from chaff |
a. filtration |
| 2. to saparate sawdust from water | b. sedimentation and deeantation |
| 3. to separate iodine from sodium chloride | c. winnowing |
| 4. to separate iron fillings from sand | d.sublimation |
|
5. it is used to separate sand and water |
e maganetic separation |
|
|
f .handpicking |
Give Two Examples for Each of the Following: Metalloids
State the number of atoms of each element, present in \[\ce{HNO3}\].
Also name the compound.
Answer the following question:
What do you understand by the statement: ‘metals are ductile and malleable’?
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Complete the statement given below by filling in the blanks with the correct words.
Atom contains ________ , with positively charged _____.
With reference to elements – define the term ‘molecule’. Give two examples each of a monoatomic, diatomic & polyatomic molecule.
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Differentiate between elements and compounds.
Classify the substances given in Fig. 2.2 into elements and compounds
