Diagonal Relationship

Q.

Highlight the similarities between Lithium and Magnesium

Q.

Give some of the diagonal relationships between beryllium and aluminum.

Q. Diagonal relationship is shown by

1. All elements of $3^{rd}$ and $4^{th}$ periods
2. All elements with their diagonally opposite elements.
3. Some of the elements of $2^{nd}$ and $3^{rd}$ periods
4. Elements of d-block

Q. A s-block element (M) reacts with oxygen to form an oxide of the formula $M{O}_2$. The oxide is pale yellow in colour and paramagnetic. The element (M) is

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

Q. The set of elements that differ in diagonal relationship from those of the other sets is

1. B - Si
2. Li - Na
3. Be - AI
4. Li - Mg

Q.

In case of noble gases the general trend in the melting points and boiling points, down the group, is

1. Decreases from He to Ar and then increases from Ar to Rn.

2. Increases from He to Rn

3. Increases from He to Ar and decreases from Ar to Rn

4. Decreases from He to Rn

Q. 6. Among [Ni(CO)4], (NiCl4]2-, [Co(NH3)4Cl2]CI, Na3 [CoF6] , Na202, and Cs02, the total number of paramagnetic compounds is (a) 2 (b) 3 (6) 4 (d) 5

Q. Beryllium and aluminium exhibit many properties which are similar. But, they differ in:

1. Forming polymeric hydrides
2. Exhibiting maximum covalency in compounds
3. Exhibiting amphoteric nature in their oxides
4. Forming covalent halides

Q. Given below are two statements.
Statement I : The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases.
Statement II : Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions.
In the light of the above statements, choose the correct answer from the options given below.

1. Both Statement I and Statement II are false
2. Both Statement I and Statement II are true
3. Statement I is false but Statement II is true
4. Statement I is true but Statement II is false

Q.

Lithium, Sodium potassium were put in one group on basis of their similar properties.

1. What are those similar properties?
2. What is the common name of this group or family?

Q.

Why is alumina insoluble in water?

Q.

What is the difference between Potassium Alum and Aluminum?

Q.

Which one has maximum electron affinity

1. N

2. Be

3. B

4. Cl

Q.

Which elements in the fourth period will have the lowest and highest electron affinities? Explain.

Q.

Name the scientist who discovered neutrons.

Q. Fe2(CO)9 is diamagnetic. Which of the followingreasons is correct?(a) Presence of one CO as bridge group(b) Presence of monodentate ligand(c) Metal-metal (Fe-Fe) bond in molecule(d) Resonance hybridization of CO

Q. Which one among the following molecule is chiral?

1. 
2. 
3. 
4. 

Q.

Element with the highest value of electronegativity in the periodic table is:

1. F

2. S

3. O

4. Cl

Q.

Be and Al exhibit diagonal relationship. Which of the following statement/s about them is/are false?
1. Both react with HCl to liberate $H_2$
2. They are made passive by $HN{O}_3$
3. Their carbides give acetylene on treatment with water.
4. Their oxides are amphoteric.

1. 3 and 4

2. 1 and 2

3. 1 only

4. 3 only

Q. Sulphur is pharamagnetic in nature at its vapour state I miss question

Q.

Magnesium oxide is used for the lining of steel-making furnaces. Explain?

Q.

If the number of elements of the sets $A$ and $B$ is $p$ and $q$, respectively. Then, the number of relations from the set $A$ to the set $B$ is

1. $2^{\left(p+q\right)}$

2. $2^{\left(pq\right)}$

3. $p+q$

4. $pq$

Q. What is the diagonal relationship? Give one example.

Q.

Why are third group elements called bridge elements?

Q. The polarizing power of which of the following pair is similar

1. 
2. 
3. Li, Mg
4. 

Q.

Explain the experiment performed by Chad­wick.

Q.

Why is Beryllium resistant to acid attack

Q.

Name the scientist who discovered the neutron.

Q. Beryllium shows a diagonal relationship with aluminium. Which of the following similarity is incorrect?

1. $B{e}_{2}C$ like $A{l}_4{C}_3$ yields methane on hydrolysis .
2. Be like Al is rendered passive by $HN{O}_3$.
3. $Be(OH{)}_2$ like $Al(OH{)}_3$ is basic.
4. Be forms beryllates A1 forms aluminates.

Q.

Name a metallic oxide soluble in excess of caustic soda solution?