NEET Chemistry MCQ: NCERT S-Block Elements | NEET.Guide Questions

A mixture of CaCO $_3$ and MgCO $_3$ weighing 1.84 g on heating left a residue weighing 0.96g. What is the percentage by mass of CaCO $_3$ in the original mixture?

A

40%

B

47.8%

C

52.2%

D

60%

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :4 mins

🔄Ncert Concepts :Stoichiometry, Alkaline Earth Metals, Decomposition

Related Questions

Dead burnt is:

A

${\rm{CaS}}{{\rm{O}}_4}$

B

${\rm{N}}{{\rm{a}}_2}{\rm{C}}{{\rm{O}}_3}$

C

Anhydrous ${\rm{N}}{{\rm{a}}_2}{\rm{S}}{{\rm{O}}_4}$

D

Anhydrous ${\rm{CuS}}{{\rm{O}}_4}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Chemical Nomenclature, Inorganic Chemistry

Iceland spar is:

A

${\rm{CaSi}}{{\rm{O}}_4}$

B

${\rm{CaC}}{{\rm{O}}_3}$

C

${\rm{Ca}}{{\rm{F}}_2}$

D

${\rm{NaAI}}{{\rm{F}}_6}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Chemical formulas, Mineral identification

Which is not true in respect of berryllium chemistry?

A

Beryllium is amphoteric

B

It forms unusual carbide ${\rm{B}}{{\rm{e}}_2}{\rm{C}}$

C

${\rm{Be}}{\left( {{\rm{OH}}} \right)_2}$ is basic

D

Beryllium halides are electron deficient

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Analyzing

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :amphoteric nature, beryllium carbide, beryllium hydroxide, electron deficient compounds

One of the important use of quicklime is:

A

As a purgative

B

In bleaching silk

C

In drying gases and alcohol

D

In dyeing cotton

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :quicklime, uses of quicklime, drying agents

Which of the following represents the composition of carnallite mineral?

A

${{\rm{K}}_2}{\rm{O }}{\rm{. A}}{{\rm{l}}_2}{{\rm{O}}_3}.6{\rm{Si}}{{\rm{O}}_2}$

B

${\rm{KN}}{{\rm{O}}_3}$

C

${{\rm{K}}_2}{\rm{S}}{{\rm{O}}_4}{\rm{. MgS}}{{\rm{O}}_4}{\rm{. MgC}}{{\rm{l}}_2}.6{{\rm{H}}_2}{\rm{O}}$

D

${\rm{KCl }}{\rm{. MgC}}{{\rm{l}}_2}.6{{\rm{H}}_2}{\rm{O}}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Mineral Composition, Chemical Formula

Which of the following process is used in the extractive metallurgy of magnesium?

A

Fused salt electrolysis

B

Self reduction

C

Aqueous solution electrolysis

D

Thermite reduction

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :extractive metallurgy, electrolysis, magnesium extraction

Gypsum, ${\rm{CaS}}{{\rm{O}}_4}.2{{\rm{H}}_2}{\rm{O}}$ on heating to about ${120^ \circ }C$ forms a compound which has the chemical composition represented by

A

${\rm{CaS}}{{\rm{O}}_4}{\rm{.}}{{\rm{H}}_2}{\rm{O}}$

B

$2{\rm{CaS}}{{\rm{O}}_4}.3{{\rm{H}}_2}{\rm{O}}$

C

$2{\rm{CaS}}{{\rm{O}}_4}{\rm{.}}{{\rm{H}}_2}{\rm{O}}$

D

${\rm{CaS}}{{\rm{O}}_4}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Hydrates, Dehydration, Chemical Formulas

Halides of alkaline earth metals form hydrates such as ${\rm{MgC}}{{\rm{l}}_2} \cdot 6{{\rm{H}}_2}{\rm{O}},{\rm{CaC}}{{\rm{l}}_2} \cdot 6{{\rm{H}}_2}{\rm{O}},{\rm{BaC}}{{\rm{l}}_2} \cdot 2{{\rm{H}}_2}{\rm{O}}$ and ${\rm{SrC}}{{\rm{l}}_2} \cdot 2{{\rm{H}}_2}{\rm{O}}$ . This shows that halides of group 2 elements:

A

Are hygroscopic in nature

B

Act as dehydrating agent

C

Can absorb moisture from air

D

All of the above

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Hygroscopy, Hydration, Dehydrating agent

Lithopone is

A

${\rm{BaO}} + {\rm{ZnS}}{{\rm{O}}_4}$

B

${\rm{BaS}} + {\rm{ZnS}}{{\rm{O}}_4}$

C

${\rm{ZnS}} + {\rm{BaS}}{{\rm{O}}_4}$

D

${\rm{ZnO}} + {\rm{BaS}}{{\rm{O}}_4}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Remembering

🎯Difficulty :Hard

⚡ Time Required :1 mins

🔄Ncert Concepts :Chemical compounds, Inorganic chemistry

One mole of magnesium nitride on the reaction with an excess of water gives

A

One mole of ${\rm{N}}{{\rm{H}}_3}$

B

Two moles of ${\rm{N}}{{\rm{H}}_3}$

C

One mole of ${\rm{HN}}{{\rm{O}}_3}$

D

Three moles of ${H_2}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:The S-Block Elements

🎯Topic:Alkaline Earth Metals

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Chemical reactions, stoichiometry, balancing equations, hydrolysis

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