Entry Test MCQ :: s-BLOCK ELEMENTS
|
|
|
|
|
31. |
Sodium is not observed in +2 oxidation state because of its |
A. |
high first ionization potential |
B. |
high second ioniation potential |
C. |
high ionic radius |
D. |
high electronegativity |
Answer: Option B
Explanation:
|
32. |
Carnalite has chemical formula |
A. |
KCI |
B. |
KCI.MgCl2.6H2O |
C. |
Na2B4O7.10H2O |
D. |
CaCO3.MgCO3 |
Answer: Option B
Explanation:
|
33. |
Magnesium metal does not burn in the vessel containing |
Answer: Option D
Explanation:
|
34. |
Electrolysis of dilute solution of NaCl results at the anode |
A. |
sodium |
B. |
hydrogen |
C. |
chlorine |
D. |
oxygen |
Answer: Option D
Explanation:
|
35. |
Second ionization potential of alkali metals are very high due to |
A. |
being s-block elements |
B. |
inert gas configurations |
C. |
ns1 electronic configuration |
D. |
being metals |
Answer: Option B
Explanation:
|
36. |
Which ion will have maximum value of heat of hydration? |
Answer: Option A
Explanation:
|
37. |
Which one can form complex? |
Answer: Option C
Explanation:
|
38. |
Which one is natron? |
A. |
Na2CO3 |
B. |
Na2CO3.10H2O |
C. |
Na2CO3.H2O |
D. |
NaHCO3 |
Answer: Option C
Explanation:
|
39. |
Addition of 2% gypsum in cement |
A. |
Triggers hydration |
B. |
Triggers hydrolysis |
C. |
Prevents rapid hardening |
D. |
all of the above |
Answer: Option C
Explanation:
|
40. |
Which one is least ionic in nature and decompose on heating. |
Answer: Option A
Explanation:
|
Read more:
|
|