Reactivity Trends (Group 2)

Q. What is the oxidation state of phosphorus in hypophosphoric acid?

1. $+1$
2. $+2$
3. $+3$
4. $+4$

Q. The solubility of $AgCl$ will be minimum in:

1. $0.01MCaC{l}_2$
2. Pure water
3. $0.001MAgN{O}_3$
4. $0.01MNaCl$

Q.

The product formed in the reaction of ${\mathrm{SOCl}}_2$ with white phosphorus is?

1. ${\mathrm{PCl}}_3$

2. ${\mathrm{SO}}_2{\mathrm{Cl}}_2$

3. ${\mathrm{SCl}}_2$

4. ${\mathrm{POCl}}_3$

Q.

What is vacant d orbital concept in pcl5? Please explain

Q. Which of the following oxides is the most acidic?

1. $BaO$
2. $BeO$
3. $MgO$
4. $CaO$

Q. Some of the Group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides, the one which is soluble in ethanol is:

1. $BeC{l}_2$
2. $MgC{l}_2$
3. $CaC{l}_2$
4. $SrC{l}_2$

Q. Alkaline earth metal nitrates on heating decompose to give :

1. $M(N{O}_2{)}_2$ and $O_2$ only
2. $MO,N_2$ and $O_2$
3. $MO,N{O}_2$ and $O_2$
4. $MO$ and $N{O}_2$ only

Q.

Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal Carbonates is most stable thermally?
(a) $MgC{O}_3$ (b) $CaC{O}_3$ (c) $SrC{O}_3$ (d) $BaC{O}_3$

Q. The basic character of hydroxides of alkaline earth metals increase in the order:

1. $Mg(OH{)}_2<Be(OH{)}_2<Ca(OH{)}_2<Ba(OH{)}_2$
2. $Be(OH{)}_2<Mg(OH{)}_2<Ca(OH{)}_2<Ba(OH{)}_2$
3. $Ba(OH{)}_2<Ca(OH{)}_2<Be(OH{)}_2<Mg(OH{)}_2$
4. $Ba(OH{)}_2<Ca(OH{)}_2<Mg(OH{)}_2<Be(OH{)}_2$

Q. Choose the correct statement(s) related to BeO.

1. It is covalent in nature
2. It is ionic in nature
3. It is a basic oxide
4. It act as both basic and acidic oxide

Q.

Discuss the trend of the following
(i) Thermal stability of carbonates of Group 2 elements.

(ii) The solubility and the nature fo oxides of group 2 elements.

Q.

BeF₂ is more soluble in water, where as the fluoride of other alkaline earth metals are insoluble because of

1. Lesser hydration energy of BeF₂ as compared to crystal lattice energy

2. Covalent nature of BeF₂

3. Greater hydration energy of BeF₂ as compared to crystal lattice energy

4. Linear structure of BeF₂

Q.

A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is
(a) magnesium nitrate (b) calcium nitrate (c) barium nitrate (d) strontium nitrate

Q. A piece of magnesium ribbon was heated to redness in an atmosphere of nitrogen and then cooled with water. The gas evolved is

1. Nitrogen
2. Oxygen
3. Ammonia
4. Hydrogen

Q. why is it easier to reduce oxide ores compared to sulphide ores?

Q. Match the following and identify the correct option.

(a)	$CO\left(g\right)+H_2\left(g\right)$	(i)	$Mg\left(HC{O}_3\right)+Ca(HC{O}_3{)}_2$
(b)	$\text{Temporary hardness of water}$	(ii)	$\text{An electron deficient hydride}$
(c)	$B_2{H}_6$	(iii)	$\text{Synthesis gas}$
(d)	$H_2{O}_2$	(iv)	$\text{Non-planar structure}$

1. (iii) (iv) (ii) (i)
2. (i) (iii) (ii) (iv)
3. (iii) (i) (ii) (iv)
4. (iii) (ii) (i) (iv)

Q.

Except carbonates and bicarbonates for all other oxo salts solubility in water increases down the group for alkali metals . Explain.

Q. Predict the correct order of reducing nature of group $15$ hydrides.

1. $N{H}_3<P{H}_3<As{H}_3<Sb{H}_3<Bi{H}_3$
2. $N{H}_3>P{H}_3>As{H}_3>Sb{H}_3>Bi{H}_3$
3. $P{H}_3<As{H}_3<N{H}_3<Sb{H}_3<Bi{H}_3$
4. $P{H}_3<As{H}_3<N{H}_3>Sb{H}_3>Bi{H}_3$

Q.

HCl is added to the following oxides which one would give $H_2{O}_2$

1. MnO₂

2. PbO₂

3. None of these

4. BaO₂

Q. Which of the following on thermal decomposition yields oxide ?

1. $Mg(N{O}_3{)}_2$
2. $Ca(N{O}_3{)}_2$
3. $Sr(N{O}_3{)}_2$
4. All of the above.

Q. Choose the correct statement(s) related to BeO.

1. It is a basic oxide
2. It is ionic in nature
3. It act as both basic and acidic oxide
4. None of the above

Q. Match List -I with List-II

List -I

$Ca{\left(OCl\right)}_2$ (i) Antacid

$CaS{O}_4\cdot \frac{1}{2}{H}_{2}O$ (ii) Cement

$CaO$ (iii) Bleaching powder
$CaC{O}_3$ (iv) Plaster of paris
Choose the most appropriate answer from the option given below:

1. (a) - (iii), (b) - (ii), (c)c - (i), (d) - (iv)
2. (a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)
3. (a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
4. (a) - (i), (b) - (iv), (c) - (iiii), (d) - (ii)

Q. is amphoteric in nature

1. $Mg(OH{)}_2$
2. $Be(OH{)}_2$
3. $Ca(OH{)}_2$

Q. 1) Are fluorine oxides more stable than iodine oxides? 2) what is the middle row anomaly for bromine oxides? Why cant it form multiple bonds with oxygen like cl?

Q. As the oxidation number of a transition metal in transition metal oxide increases, the acidic character

1. Increases
2. Decreases
3. Remains the same
4. Cannot be predicted

Q. Which of the following elements can form stable nitrides

1. Na
2. Cs
3. Mg
4. Ca

Q.

Which of the following compounds is a peroxide?

1. $K{O}_2$

2. $Ba{O}_2$

3. $Mn{O}_2$

4. $N{O}_2$

Q. Which of the following sequence is correct for solubility in $H_{2}O$?
(1) $BeS{O}_4>MgS{O}_4>CaS{O}_4>BaS{O}_4$
(2) $Be(OH{)}_2>Mg(OH{)}_2>Ca(OH{)}_2>Ba(OH{)}_2$
(3) $LiOH<NaOH<KOH<RbOH$
(4) $L{i}_{2}C{O}_3<N{a}_{2}C{O}_3<K_{2}C{O}_3<R{b}_{2}C{O}_3$

1. 1, 3, 4
2. 1, 2, 4
3. 1, 3, 4
4. 2, 4

Q. The correct order of decreasing solubility of AgCl in
(A) water
(B) 0.1 M NaCl
(C) 0.1 $BaC{l}_2$
(D) 0.1M $N{H}_3$ is

1. D>A>B>C
2. D>C>B>A
3. B>A>D>C
4. A>D>B>C

Q. An element with atomic number 113 has been discoverd it will belong to which of group number , block, period, and outershell electronic configuration?