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Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
what are the types of solutions?
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
what is hygroscopic?
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
Question) BeO is amphoteric while the oxides of other alkaline earth metals are ionic. Explain with reasons.
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
(i) Explain why Li
2
CO
3
decompose at a lower temperature than Na
2
CO
3
(ii) Name the ions present inside and outside the biological cells in higher concentrations.
Answer
2
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
Question) Explain the trend in the stability of alkali metal carbonates and hydrogencarbonates on moving down the group.
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
Question) How does the basic character of alkali metal hydroxides vary down the group in the periodic table ?
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
1. Name the most abundant element of group two.
2. What is the role of magnesium in plants?
3. Explain why elements of group two form
M
2
+
ions and not
M
3
+
ions.
4. Which metal among Na or Mg has higher second ionisation enthalpy? Explain the reason.
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
solubility depends upon?
Answer
2
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
in flame test of alkaline earth metals beryllium and magnesium do not show any colour why? then how can we differentiate among them?
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
what is the difference between electrochemical and photoelectric cells?
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
in alkali metals why lithium is strongest?
Answer
2
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
difference between solvation enthalpy and hydration enthalpy?
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
Question) Explain why KO
2
is paramagnetic in nature.
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
Question) How do sodium and lithium differ in their reactivities towards water ?
Answer
1
Shobhil Shrivastava
Subject: Chemistry
, asked on 15/2/17
1. Why is sodium less reactive than potassium?
2. Why is caesium used in photoelectric cell?
3. Explain why Li
+
has the lowest mobility in aqueous solution.
4. Explain why sodium forms Na+ and not Na
2
+
.
Answer
1
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What are you looking for?
(ii) Name the ions present inside and outside the biological cells in higher concentrations.
2. What is the role of magnesium in plants?
3. Explain why elements of group two form M2+ ions and not M3+ ions.
4. Which metal among Na or Mg has higher second ionisation enthalpy? Explain the reason.
2. Why is caesium used in photoelectric cell?
3. Explain why Li+ has the lowest mobility in aqueous solution.
4. Explain why sodium forms Na+ and not Na2+.