Diagonal Relationship between Li and Mg

Q.

Lithium is strongest reducing agent among alkali metals due to which of the following factor?

1. Ionization energy

2. Electron affinity

3. Hydration energy

4. Lattice energy

Q.

Lithium shows diagonal relationship with which element?

Q.

Assertion: In any ionic solid (MX) with Schottky defects, the number of positive and negative ions are same.

Reason: Equal numbers of cation and anion vacancies are present.

1. If both assertion and reason are true and the reason is the correct explanation of theassertion.
2. If both assertion and reason are true but reason is not the correct explanation of the assertion.
3. If assertion is true but reason is false.
4. If assertion is false but reason is true.

Q. Which of the following is formed when lithium is heated in air ?

1. Only Li2O

2. Only Li3N

3. Both Li2O and LiN3

4. Both Li2O and Li3N

Q.

Which of the following ions forms a hydroxide that is highly soluble in water?

1. ${\mathrm{K}}^{+}$

2. ${\mathrm{Zn}}^{2+}$

3. ${\mathrm{Ni}}^{2+}$

4. ${\mathrm{Al}}^{+3}$

Q. The ionic radii of $K^{+}andB{r}^{-}$ ions are 133 and 195 pm. The edge length of the unit cell of KBr is

1. 328 pm
2. 656 pm
3. 299 pm
4. 425.5 pm

Q.

Going from fluorine to chlorine, bromine and iodine, the electronegativity

1. Increases

2. Decreases

3. First decreases then increases

4. Changes randomly

Q. Each of the following is true for white and red phosphorus except that they

1. are both soluble in ${\text{CS}}_2$
2. can be oxidised by heating in air
3. consist of the same kind of atoms
4. can be converted into one another

Q. Which of the following is true for a monoclinic system:

1. $a\ne b\ne c,\alpha =\gamma ={90}^{\circ },\beta \ne {90}^{\circ }$
2. $a\ne b\ne c,\alpha \ne \beta \ne \gamma \ne {90}^{\circ }$
3. $a=b=c,\alpha \ne \beta \ne \gamma \ne {90}^{\circ }$
4. $a=b=c,\alpha =\beta =\gamma \ne {90}^{\circ }$

Q. Lithium is related diagonally to

1. Na

2. Ca

3. Mg

4. Both b and c

Q. Among the statements (a)-(d), the correct ones are :
(a) Lithium has the highest hydration enthapy among the alkali metals.
(b) Lithium chloride is insoluble in pyridine.
(c) Lithium cannot form enthynide upon its reaction with ethyne.
(d) Both lithium and magnesium react slowely with $H_{2}O$.

1. (a), (b) and (d) only
2. (b) and (c) only
3. (c) (a) and (d) only
4. (a), (c) and (d) only

Q. 22. Why does magnesium doesnt displace hydrogen from a boiling caustic soda solution?

Q. Which of the following do not impart colour to the flame?

1. Be
2. Ca
3. Ra
4. Mg

Q. Which among the following is completely soluble in water?

1. $NaF$
2. $MgF$
3. $LiF$
4. $M{g}_3(P{O}_4{)}_2$

Q. A metal $M$ readily forms water soluble $MS{O}_4.$ It also forms oxide $MO$ which becomes inert on heating. Hydroxide $M(OH{)}_2$ is insoluble in water but soluble in $NaOH$ solution. What is $M$ ?

1. $Mg$
2. $Ba$
3. $Ca$
4. $Be$

Q. ($LiF,Be{F}_2,N{a}_{3}P{O}_4,K_{3}P{O}_4,Ba{F}_2,Mg{F}_2,L{i}_{3}P{O}_4,NaF,CsF,Ca{F}_2,M{g}_3(P{O}_4{)}_2$)

Q. What is the main reason of diagonal relationship between lithium and magnesium?

1. Electronegativity remains constant the same on moving parallel.
2. Electronegativity remains constant the same on moving horizontally.
3. Electronegativity remains constant the same on moving diagonally.
4. Electronegativity remains constant the same on moving vertically.

Q. The type of defect $NaCl$ crystal can exhibit is:

1. Impurity defect
2. Schottky defect
3. Interstitial defect
4. Frenkel defect

Q. 23 With increasing concentration below 0.04 M of alkali metals in liquid ammonia conductivity of solution increases or decreases?

Q. 2.Is Gold Amphoteric oxides?

Q. Diagonal relationship is not shown by:

1. $Li$ and $Mg$
2. $Be$ and $Al$
3. $C$ and $P$
4. $B$ and $Si$

Q. Why HF2- is present though HBr2-is not present?
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Q. Which of the following will be sparingly soluble in water?

1. $C{a}_3(P{O}_4{)}_2$
2. $Ca{F}_2$
3. $M{g}_3\left(P{O}_4\right)2$
4. $NaF$

Q. Elements showing diagonal relationship are:

1. $Li$ and $Be$
2. $Li$ and $Mg$
3. $Li$ and $Na$
4. $Al$ and $Si$

Q. Amphoteric nature of aluminium is employed in which of the following process for extraction of aluminium?

1. Baeyer's process
2. Hall's process
3. Serpeck's process
4. Dow's process

Q. The alkaline earth metal which shows properties similar to aluminium is:

1. $Ca$
2. $Be$
3. $Sr$
4. $Ba$

Q. The type of defect $NaCl$ crystal can exhibit is:

1. Interstitial defect
2. Impurity defect
3. Frenkel defect
4. Schottky defect

Q. How many of the following reaction(s) is/are correct?
$\left(i\right)BaC{l}_2+AcOH+K_{2}Cr{O}_4\to \text{Yellow ppt}$
$\left(ii\right)BaC{O}_3\left(s\right)+AcOH+K_2{C}_2{O}_4\to \text{White ppt}$
$\left(iii\right)BaC{O}_3\left(s\right)+AcOH+K_{2}Cr{O}_4\to \text{No ppt}$
$\left(iv\right)SrC{O}_3\left(s\right)+AcOH+K_{2}Cr{O}_4\to \text{No ppt}$

Q. Which of the following pairs shows diagonal relationship?

1. $Li$ and $Na$
2. $Na$ and $Mg$
3. $Al$ and $C$
4. $Li$ and $Mg$