Conductivity MP BP and Electronegativity (Group 2)

Q. Why are group 2 elements called as alkaline earth metal?

Q.

Which is insoluble in water?

Q.

At equilibrium:

1. Cell potential' E _cell' becomes zero

2. Cell potential 'E _cell' becomes unity

3. Equilibrium constant becomes zero

4. Equilibrium constant becomes equal to electrode potential

Q. Match the species given in column $I$ with the properties mentioned in column $II$

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \left(A\right)& \text{Diborane}& \left(i\right)& \text{used as a flux for soldering metals}\\ \left(B\right)& \text{Gallium}& \left(ii\right)& \text{crystalline form of silica}\\ \left(C\right)& \text{Borax}& \left(iii\right)& \text{banana bond}\\ \left(D\right)& \text{Aluminosilicate}& \left(iv\right)& \text{low melting high boiling useful for measuring high temperatures}\\ \left(E\right)& \text{Quartz}& \left(v\right)& \text{used as a catalyst in petrochemical industries.}\end{array}$

Q. Lake test of $A{l}^{3+}$ ion is based on adsorption of blue litmus on solid surface of

1. $A{l}_2(C{O}_3{)}_3$
2. $Al(OH{)}_3$
3. $AlC{l}_3$
4. $Al$ metal

Q.

The valency of ferric ion is ______ .

Q. Which one of the following reaction is an example of calcination process?

1. $2Ag+2HCl+\left[0\right]\to 2AgCl+H_{2}O$
2. $2Zn+O_2\to 2ZnO$
3. $2ZnS+3O_2\to 2ZnO+2S{O}_2$
4. $2PbC{O}_3.Pb(OH{)}_2\stackrel{\Delta }{\to }3PbO+2C{O}_2\uparrow +H_{2}O$

Q.

Why are Lithium salts mostly hydrated?

Q. The reaction of sulphur in alkaline medium is given below:
$S_8\left(s\right)+aO{H}^{-}\left(aq\right)⟶b{S}^{2-}\left(aq\right)+c{S}_2{O}_3^{2-}\left(aq\right)+d{H}_{2}O\left(l\right)$

The value of a is (Integer answer)

Q.

What is another name for Group 14?

Q.

Which one of the following molecule exists as tetra-atomic molecule?

1. Sulfur

2. Helium

3. Oxygen

4. Phosphorus

Q.

Write the correctly balanced equation for the reaction of dilute Sulphuric acid with each of the following:

1. Copper Carbonate
2. Lead Nitrate solution
3. Zinc Hydroxide.

Q.

Are alkaline earth metals soft or hard?

Q.

Write a word equation for the following:

Carbon reacts with oxygen to form carbon dioxide.

Q. Lithium fluoride has high lattice energy than other alkali metal fluoride then also its melting point is low. why?

Q.

In view of their low ionization energies, the alkali metals are:

1. Weak reducing agents

2. Strong oxidizing agents

3. Weak oxidizing agents

4. Strong reducing agents

Q.

Aluminium is diagonally related to .

Q.

The correct sequence of increasing covalent characters is represented by?

${\mathrm{LiCl}}_2,\mathrm{NaCl},{\mathrm{BeCl}}_2$

Q.

Which type of solid is camphor? Please explain.

Q. The compond having least soluble in water is:

1. Methanol
2. Acetaldehyde
3. Acetone
4. Acetophenone

Q. The colour of transition metal compound is due to :

1. complete $n-subshell$.
2. small size metal ion.
3. incomplete $(n-1)d-subshell$.
4. none of these.

Q.

Metals such as lithium, sodium and potassium are called _________ metals.

Q. An ionic compound $A^{+}{B}^{-}$ is most likely to be formed when:

1. The ionization energy of $A$ is high and the electron affinity of $B$ is low
2. The ionization energy of $A$ is low and the electron affinity of $B$ is high
3. Both the ionization energy of $A$ and the electron affinity of $B$, are high
4. Both the ionization energy of $A$ and electron affinity of $B$, are low

Q.

Which of the following is the least soluble in water?

1. n-Butyl alcohol
2. n-Pentyl alcohol
3. n-Hexyl alcohol
4. n-Heptyl alcohol

Q. Which of the following elements do not react directly with nitrogen to form nitride?

1. $Na$
2. $Li$
3. $K$
4. $Rb$

Q. Consider the following structure (I), (II), (III) and (IV).

Which of the following statements is not correct?

1. II and III are identical
2. I and II are enantiomers
3. I and III are enantiomers
4. II and IV are enantiomers

Q.

Name the gas which has the smell of rotten egg.

Q. An element Barium has atomic number 56. Look up its position in the periodic table and answer the following questions.

(iv) What will be the formula of its phosphate?

Q.

Activity series of metals with dilute hydrochloric acid is ______

1. $\mathrm{Mg}>\mathrm{Al}>\mathrm{Zn}>\mathrm{Fe}$

2. $\mathrm{Fe}>\mathrm{Zn}>\mathrm{Al}>\mathrm{Mg}$

3. $\mathrm{Al}>\mathrm{Zn}>\mathrm{Fe}>\mathrm{Mg}$

4. $\mathrm{Zn}>\mathrm{Fe}>\mathrm{Mg}>\mathrm{Al}$

Q. Predict the product of reaction of $I_2$ with $H_2{O}_2$ in basic medium.

1. $I_3^{-}$
2. $I_2{O}_3$
3. $I{O}_3^{-}$
4. $I^{-}$