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MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
- The nucleus of an atom has 5 protons and 6 neutrons. What would be the...
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- Assertion : Small quantity of soap is required to prepare a stable emu...
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- Assertion : Sea water looks blue. Reason : Due to scatting of light b...
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- Write the electronic configuration of the element with atomic number 1...
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- The atomic number of an element X is 16. (a) Write down the electronic...
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- The atomic number of an element X is 16. (b) What will be the valency...
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- What is the reason for the different atomic masses of the isotopes of ...
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- State whether the statement is true or false- Phosgene is the commerci...
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- Match the column I with type of colloid given in coloumn II.
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- Match list I with list II and select the correct answer using the code...
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- Match list I of enzymatic reaction with enzyme given in list II:
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- An element has Z = 7. What is the valency of the element ? Also name t...
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- What is the number of valence electrons in the atoms of an element hav...
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- Give the number of protons, neutrons and electrons in the chlorine ha...
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- The mass number of two atoms X and Y is the same (40 each) but their a...
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- Elements having valency ‘one’ are :
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- For an element, Z = 9. The valency of this element will be :
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- The number of valence electrons in a sulphide ion, S2–, is :
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- The atomic number of an element X is 8 and that of element Y is 4. Bot...
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- What is the number of valence electrons in : (a) sodium ion, Na+
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