S- And p-Block ...

Which of the following statements are FALSE?

P. All the bonds that are present in PCl₅ are similar.
Q. ICl is more reactive than I₂.
R. Chlorine is a stronger oxidising agent than fluorine.
S. Pentahalides are more covalent than trihalides.

What is the correct order of thermal stability of hydrides of group 16 elements?

Which of the following represents the correct order of reducing character of hydrides of group 15 elements?

Which of the following statements are FALSE?

P. The boiling point of PH₃ is lower than that of NH₃.
Q. Red phosphorus is more reactive than white phosphorus.
R. Phosphorus is sp³ hybridised in PCl₃.
S. In the solid state, PCl₅ exists as a covalent solid.

Directions: In the following question, there are two statements, Assertion A and Reason R. Consider both the statements independently and mark your answer.

Assertion A: Elements of Group 16 generally show lower value of first ionization enthalpy as compared to the corresponding periods of Group 15.
Reason R: Due to extra stable half-filled p orbital electronic configurations of Group 15 elements, larger amount of energy is required to remove electrons as compared to Group 16 elements.

Which of the following statements are TRUE?

1. H₂S is more acidic than H₂Te.
2. Ozone is thermodynamically more stable than oxygen.
3. The two oxygen-oxygen bond lengths in the ozone molecule are identical.
4. Rhombic sulphur is the stable form of sulphur at room temperature.

Directions: In the following question, there are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answer.

Assertion (A): Halogens have the maximum negative electron gain enthalpy in their respective periods in the periodic table.
Reason (R): Halogens have the largest size in their respective periods and therefore, the highest effective nuclear charge.

Match the following:

The correct order of hydration enthalpies of alkali metal ions is

The alkali metals and their salts impart characteristic colour to an oxidising flame. Which of the following matchings of alkali metals and characteristic colour imparted to an oxidising flame by them is correct?

Match the column – I (element) with column – II (use) and select the correct option.

In which of the following does the solubility in water increase down the group?

I. Alkaline earth metal hydroxides
II. Alkaline earth metal carbonates
III. Alkaline earth metal sulphates

Which of the following statements are FALSE?

1. Compounds of alkaline earth metals are less hydrated than those of alkali metals.
2. Quicklime exhibits thermoluminescence.
3. Aqueous solution of calcium hydroxide is known as milk of lime.
4. Oxide and hydroxide of beryllium are amphoteric in nature.

Which of the following alkaline earth metals crystallize in face centered cubic structure?
1. Beryllium
2. Magnesium
3. Calcium
4. Strontium
5. Barium

Which of the following metals do not impart characteristic colour to oxidizing flame?

Which of the following terms statements are TRUE?
P. All alkali metal elements form solid hydrogen carbonates.
Q. Calcium is fifth most abundant element in the earth's crust.
R. Francium is highly radioactive.
S. Hydration enthalpies of alkaline earth metal ions are larger than those of alkali metal ions.

Which of the following statements regarding alkaline earth metals is/are incorrect?

1. All alkaline earth metal oxides are basic.
2. All alkaline earth metal hydrides are ionic.
3. Stability of peroxides of alkaline earth metals increases down the group.
4. The thermal stability of alkaline earth metal hydroxides increases down the group.

Li resembles Mg mainly due to similarity in sizes of their atoms and ions. The main points of similarity are:

i. Both LiOH and Mg(OH)₂ are strong bases.
ii. Carbonates of both, on heating, decompose to produce oxides and carbon dioxide.
iii. Both react with nitrogen to give covalent nitrides.
iv. Both Li and Mg form solid bicarbonates.
v. LiCl and MgCl₂ are soluble in ethanol.
vi. The hydroxides, bicarbonates and fluorides of both Li and Mg are sparingly soluble in water.

Which of the following statement are true?

1. Melting points of alkaline earth metals are greater than those of alkali metals.
2. All alkali metal carbonates are stable at a temperature around 800^oC.
3. Carbonates of alkali metals are more stable to heat than carbonates of alkaline earth metals.

Which of the following elements are radioactive?

1. Cesium
2. Barium
3. Radium
4. Francium
5. Rubidium