Gypsum and Epsom

Q. The chemical formula of Plaster of Paris is:

1. $CuS{O}_4.5H_{2}O$
2. $CaC{O}_3$
3. $N{a}_{2}C{O}_3$
4. $CaS{O}_4.1/2H_{2}O$

Q.

What is the chemical name of ‘phitkari’?

Q.

The reaction between Copper sulphate solution and Sodium hydroxide is a precipitation reaction. The color of the precipitate so formed is

1. Blue.

2. White.

3. Yellow.

4. Red.

Q.

Boojho's sister broke a white dove, a symbol of peace, made of Plaster of Paris (POP). Boojho tried to reconstruct the toy by making a powder of the broken pieces and then making a paste by mixing water. Will he be successful in his effort? Justify your answer.

Q. Molecular formula of epsom is :

1. $MgS{O}_4.7H_{2}O$
2. $CuS{O}_4.7H_{2}O$
3. $CuS{O}_4.17H_{2}O$
4. $CaS{O}_4.7H_{2}O$

Q. The chemical formula for plaster of paris -

1. 
2. 
3. 
4. 

Q. Choose the correct option regarding the uses of Plaster of Paris.

1. It is used for making glass
2. It is used in soda-acid fire extinguisher.
3. It is used by doctors for supporting fractured bones.
4. It is used for making soaps.

Q. Which among the following are the uses of epsom?

1. Eases stress and relaxes the body.
2. Helps muscles and nerves function properly.
3. Used in the manufacturing of black board chalks.
4. Used for setting fractured bones.

Q.

Plaster of Paris was first found in Montmatre in Paris in the form of white rocks. Chemically, it can be obtained by heating gypsum carefully to about 373 K in a kiln. The temperature must be carefully controlled because at the higher temperatures, it gets completely dehydrated to form anhydrous calcium sulphate. It is very commonly used in surgical bandages for setting fractured bones. Is the chemical formula of Plaster of Paris actually correct?

Q. How does Magnesium Oxide give Magnesium Sulphate?

1. $MgO$ $+$ $H_{2}S{O}_3$
2. $MgO$ $+$ $H_{2}S{O}_4$
3. $MgO$ $+$ $S{O}_2$
4. $MgO$ $+$ $S{O}_3$

Q.

17. Common salt is a mixture of

1. Sodium chloride and magnesium chloride

2. Sodium Chloride and iodine

3. Sodium Chloride , Iodine and potassium iodide

4. Sodium Chloride , sodium iodide and potassium iodide

Q. What is Plaster of Paris used for?

Q. What are the water molecules attached to Epsom salt called?

1. Water of evaporation
2. Water of condensation
3. Water of hydration
4. None of these

Q. Epsom salt is:

1. ${CuSO}_4$
2. ${CaSO}_4$
3. ${MgSO}_4.7H_{2}O$
4. ${Na}_2{SO}_4$

Q. What is/are the uses of Epsom salt?

1. Pharmaceutical use
2. Agricultural use
3. used as a brewing salt
4. Used as a desiccant

Q. What is the chemical formula of gypsum?

1. ${\text{CaSO}}_4.2{\text{H}}_2\text{O}$
2. ${\text{CuSO}}_4.5{\text{H}}_2\text{O}$
3. ${\text{Na}}_2{\text{CO}}_3.10{\text{H}}_2\text{O}$
4. ${\text{CaOCl}}_2$

Q. Reaction of magnesium to blue copper (II) sulphate solution gives ppt of:

1. black
2. blue
3. white
4. brown

Q. Plaster of Paris is obtained by:

1. adding water to calcium sulphate.
2. adding sulphuric acid to calcium hydroxide.
3. heating gypsum to a very low temperature.
4. heating gypsum to ${120}^{\circ }C$.

Q. Write two uses of Plaster of Paris.

Q. Rock salt and gypsum are ___________ formed sedimentary rocks.

1. Chemically
2. Mechanically
3. Physically
4. All of these

Q. Plaster of Paris is prepared by

1. Sugar
2. Rocky salts
3. Gypsum
4. Salts

Q.

39) Epsom salt is

1. ${\mathrm{MgSO}}_4.7{\mathrm{H}}_2\mathrm{O}$

2. $\mathrm{KCl}.{\mathrm{MgCl}}_2.6{\mathrm{H}}_2\mathrm{O}$

3. ${\mathrm{Na}}_3{\mathrm{AlF}}_6$

4. ${\mathrm{CaSO}}_4.2{\mathrm{H}}_2\mathrm{O}$

Q. Which of the following is isomorphous with $MgS{O}_4\cdot 7H_{2}O$ ?

1. Green vitriol
2. Blue vitriol
3. Red vitriol
4. Vitriol of mass

Q.

What does the symbol aq represent in a chemical reaction?

Q. The chemical formula of Plaster of Paris is:

1. $CuS{O}_4.5H_{2}O$
2. $CaC{O}_3$
3. $CaS{O}_4.2H_{2}O$
4. $N{a}_{2}C{O}_3$

Q. $MgS{O}_4$ on reaction with $N{H}_{4}OH$ and $N{a}_{2}HP{O}_4$ forms a white crystalline precipitate. What is its formula?

1. $Mg\left(N{H}_4\right)P{O}_4$
2. $M{g}_3(P{O}_4{)}_2$
3. $Mg(OH{)}_2$
4. $MgS{O}_4$

Q.

Choose the correct word or phrase from the brackets to complete the following sentences:

Ammonium chloride is a soluble salt prepared by _— (precipitation, neutralization)

Q. Choose the correct option regarding the uses of Plaster of Paris.

1. It is used for making glass
2. It is used in soda-acid fire extinguisher.
3. It is used by doctors for supporting fractured bones.
4. It is used for making soaps.