11th Standard Syllabus & Materials
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TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil பீடு பெற நில் - துணைப்பாடம் - வாடிவாசல் Important Questions And Answers Study Material - QB365 Set A
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Published on: 13/05/2022
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latest Book back QuestionsDownload Tamil Nadu 11th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Chemistry Test1.
Explain what is meant by efflorescence.
2.
Why alkaline earth metals are harder than alkali metals.
3.
An alkali metal (x) forms a hydrated sulphate, X2SO4 • 10 H2O. Is the metal more likely to be sodium (or) potassium.
4.
Beryllium halides are Covalent whereas magnesium halides are ionic why ?
5.
Substantiate lithium fluoride has the lowest solubility among group one metal fluorides.
1.
Efflorescence is the spontaneous loss of water by a hydrated salt, which occurs when the aqueous vapor pressure of the hydrate is greater than the partial pressure of the water vapour in the air. This is the property of salts
Ex: Glauber's salt- Na2SO4·10H2O
Epsom salt - MgSO4·7H2O
2.
Alkali metals have one eo in their outer most shell. Alkaline earth metals have 2 eo in their outer most shell. More valence electrons and more positively charged nucleii leads to greater opportunity for metallic bonding.
3.
In Na2 SO4.10 H2O. So the metal will be Na (sodium). The salt is washing soda.
4.
This is due to the smaller size and relatively high charge as Be2+ ion. Moreover Beryllium is a non - metal. But Magnesium is a metal. In the case of beryllium the ionisation energy and electronegativity of the halides are almost similar; but there is a vast difference in IE and electronegativity between Mg and halides.
5.
The lattice energy of LiF is higher due to the smaller size of Li+ and F-. So LiF has lower solubility.
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - துணைப்பாடம் - யானை டாக்டர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set A
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