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DINESH PUBLICATION-ATOMS AND MOLECULES-VERY SHORT ANSWER QUESTIONS
- Out of atoms and molecules, which can exist independently?
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- What does the symbol 'u'represent?
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- Write the chemical symbols and Latin names of (i) gold (ii) mercury?
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- Are the mass of a molecule of a substance and its molar mass same?
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- How are mass, molar mass and number of moles of a substance related to...
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- Avogardo's number represents how many particles?
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- Give an example of (i)a divalent anion (ii)a trivalent cation (iii) a ...
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- Calculate the molar mass of ethyl alcohol (C(2)H(5)OH).
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- If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the ma...
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- What is the valency of calcium in CaCO(3)?
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- What happens to an element A if its atom gains two electrons?
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- Why is a cation so named?
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- An element Z forms an oxide with formula Z,O3. What is its valency?
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- The valency of an element A is 4. Write the formula of its oxide.
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- An element X has valency 3 while the element Y has valency 2. Write th...
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- Formula of the carbonate of a metal M is M(2)CO(3). Write the fomula o...
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- What do you understand from the statement "relative atomic mass of sul...
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- Calculate the formula unit mass of CaCl(2).
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- Which of the following represents the correct chemical formula? (i) ...
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- Sample A contains one gram molecules of oxygen molecules and sample B ...
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