Compounds of Ca and Na -Preparations, Properties & Uses NCERT Exercise Based MCQs The s-Block Elements (OLD NCERT) Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

The chemical formula of Plaster of Paris is:

1. ${CaSO}_{4} . \frac{1}{2} H_{2} O$

2. ${CaSO}_{4} . 2 H_{2} O$

3. ${CaSO}_{4} . H_{2} O$

4. 3CaSO₄.H₂O

Subtopic: Compounds of Ca and Na -Preparations, Properties & Uses |

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The incorrect equation for Solvay process is -

1. $Ca {(OH)}_{2} + 2 {NH}_{4} Cl \to {NH}_{3} + 2 H_{2} O + {CaCl}_{2}$

2. $2 {NaHCO}_{3} \to {Na}_{2} {CO}_{3} + {CO}_{2} + H_{2} O$

3. $2 NaCl + {CaCO}_{3} \to {Na}_{2} {CO}_{3} + {CaCl}_{2}$

4. None of the above.

Subtopic: Compounds of Ca and Na -Preparations, Properties & Uses |

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Potassium carbonate cannot be prepared by the Solvay process because -

1.	Potassium carbonate is insoluble in water and does not precipitate out.
2.	Potassium carbonate is soluble in water and does not precipitate out.
3.	Potassium carbonate is soluble in water and does precipitate out.
4.	Potassium carbonate is insoluble in water and does precipitate out.

Subtopic: Compounds of Ca and Na -Preparations, Properties & Uses |

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The incorrect reaction among the following is:

1.	Na₂O₂(s) + 2H₂O(l) → 2NaOH(aq) + H₂O₂(g)
2.	2KO₂(s) + 2H₂O(l) → 2KOH(aq) + H₂O₂(aq) + O₂(g)
3.	Na₂O(s) + CO₂(g) → NaHCO₃ (s) + H₂O₂(aq)
4.	Na₂O(s) + CO₂(g) → Na₂CO₃ (s)

Subtopic: Chemical Properties | Compounds of Ca and Na -Preparations, Properties & Uses |

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Quick lime is heated with silica to give:

1. CaSiO₃

2. CaSiO₄

3. CaSiO

4. Ca(SiO)₃

Subtopic: Compounds of Ca and Na -Preparations, Properties & Uses |

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The correct statement(s) among the following options is/are:

1.	Sodium metal reacts violently with water.
2.	Sodium metal is heated in a free supply of air to give sodium peroxide.
3.	Sodium peroxide is dissolved in water to give sodium hydroxide.
4.	All of the above.

Subtopic: Chemical Properties | Compounds of Ca and Na -Preparations, Properties & Uses |

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