The product obtained after heating. the gypsum at 125°C?

The product obtained after heating. the
gypsum at 125°C?
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1 Answer

Answer :

Plaster of Paris
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What is obtained when gypsum is heated to 125°C?

Description : What is obtained when gypsum is heated to 125°C?

Last Answer : Plaster of paris

Sodium phenoxide reacts with CO2 at 125°C under 5 atm pressure to give salicylic acid. This reaction is called (a) Kolbe's reaction (b) Perkin reaction (c) Wurtz reaction (d) HVZ reaction

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Pick out the wrong statement. (A) Dehydration of ammonium carbamate to produce urea is endothermic (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable (C) Gypsum (CaSO4 . 2H2O) is obtained as a by-product in the wet process for manufacture of ortho-phosphoric acid (D) Phosphate rock when reacted with dilute H2SO4 produces superphosphate

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Last Answer : (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable

On heating, Gypsum loses certain percentage of its water content and becomes (1) Chalk (2) Calcium sulphate (3) Plaster of Paris (4) a pearl

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Last Answer : (3) Plaster of Paris Explanation: Plaster of paris, quick-setting gypsum plaster consisting of a fine white powder (calcium sulfate hemihydrate), which hardens when moistened and allowed to dry.

Heating of __________ to 120°C, produces plaster of paris. (A) Blue vitriol (B) Gypsum (C) Calcium silicate (D) Calcium sulphate

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The product obtained after the heating of White Phosphorous at a high temperature is?

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Chromium obtained from chromite is used in making. A. Gypsum B. Pesticide C. Stainless Steel D. Fertilizer

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Last Answer : ANSWER: B

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Last Answer : ANSWER: B

Plaster of Paris is obtained by calcining (A) Bauxite (B) Gypsum (C) Lime stone (D) None of these

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Electric process as compared to wet process (for the manufacture of phosphoric acid) (A) Can use only high grade phosphate rock (B) Is used less frequently (C) Produces a valuable by-product called gypsum (D) Is weak acid process

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Description : Amorphous silicon is obtained by heating silica with

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Description : Magnesium oxide can be obtained by heating :-

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Description : The volume of `CO_(2)` at STP obtained by heating 1 g of `CaCO_(3)` will be

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A gas is obtained on heating ammonium nitrate. Which of the following statements are incorrect about this gas

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Description : Ammonium dichromate on heating liberates a gas. The same gas will be obtained by :

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A gas is obtained on heating ammonium nitrate. Which of the following statements are incorrect about this gas

Description : A gas is obtained on heating ammonium nitrate. Which of the following statements are incorrect about this gas

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Ammonium dichromate on heating liberates a gas. The same gas will be obtained by :

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Description : Quicklime is an alkaline powder obtained by strongly heating which other material?

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Ethylene is obtained from ethyl bromide by : (a) Simple heating (b) Hydrolysis (c) Dehydrohalogenation (d) Nucleophilic substitution

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Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. The data illustrates [AMU 1983] (A) Law of reciprocal proportions (B) Law of constant proportions (C) Law of multiple proportions (D) Law of equivalent proportions

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Pick up the correct statement from the following: (A) The heating of a material to redness in contact with air, is known as calcination (B) The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting (C) The product that remains after calcination of limestone, is called lime (D) All the above

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Gypsum is added to the soil? (a) To increase the alkalinity (b) To decrease the acidity (c) To decrease the alkalinity (d) As an insecticide

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Which of the following is not a compound of calcium? (a) Gypsum (b) Marble (c) Chalk (d) Molybdenum

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Calcium sulphate is known as-----? A. Epsom salt B. Gypsum salt (Answer) C. Blue vitriol D. Potash alum

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Last Answer : B. Gypsum salt (Answer)

What is used in making of alloys? A. Gypsum B. Granite C. Chromium (Answer) D. Lime-stone

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Which one of the following is a non-metallic mineral? A. Manganese B. Magnesium C. Gypsum (Answer) D. Bauxite E. None of these

Description : Which one of the following is a non-metallic mineral? A. Manganese B. Magnesium C. Gypsum (Answer) D. Bauxite E. None of these

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Which of the following salt has water of crystallization? (A) Washing soda (B) Baking soda (C) Gypsum (D) None

Description : Which of the following salt has water of crystallization? (A) Washing soda (B) Baking soda (C) Gypsum (D) None

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Gypsum is heated at........temperature to form plaster of paris.(a) 110degree Celsius (b) 120degree Celsius (c) 100degree Celsius (d) 101degree Celsius

Description : Gypsum is heated at........temperature to form plaster of paris.(a) 110degree Celsius (b) 120degree Celsius (c) 100degree Celsius (d) 101degree Celsius

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Which one of the following salts does not contain water of crystallisation? (a) Blue vitriol (b) Baking soda (c) Washing soda (d) Gypsum

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Last Answer : (b) Baking soda

At what temperature is gypsum heated to form Plaster of Paris?a) 90°C b) 100°C c) 110°C d) 120°C

Description : At what temperature is gypsum heated to form Plaster of Paris?a) 90°C b) 100°C c) 110°C d) 120°C

Last Answer : b) 100°C

Which one of the following salts does not con-tain water of crystallisation? a) Blue vitriol b) Baking soda c) Washing soda d) Gypsum

Description : Which one of the following salts does not con-tain water of crystallisation? a) Blue vitriol b) Baking soda c) Washing soda d) Gypsum

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Which one of the following salts does not contain water of crystallisation? a) Soda Blue vitriol b) Baking soda c) Washing d) Gypsum

Description : Which one of the following salts does not contain water of crystallisation? a) Soda Blue vitriol b) Baking soda c) Washing d) Gypsum

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The salt which does not possess water of crystallization is (a) Bleaching powder (b) Gypsum (c) Washing Soda (d) none of the above

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Do California homes in fire zones use gypsum board / dry wall / sheet rock for their walls?

Description : Do California homes in fire zones use gypsum board / dry wall / sheet rock for their walls?

Last Answer : Fire-proof like cinder block walls and metal roofs. No wood or flammable material on the outside?

where can i buy agricultural gypsum

Description : where can i buy agricultural gypsum

Last Answer : Need Answer

Which state is the largest producer of Gypsum? -Do You Know?

Description : Which state is the largest producer of Gypsum? -Do You Know?

Last Answer : Rajasthan is by far the largest producer of gypsum in India [99 per cent of the total production of India]

What are the chemical signals of gypsum ?

Description : What are the chemical signals of gypsum ?

Last Answer : Chemical signal of gypsum CaSO4.2H2O.

What is Gypsum ?

Description : What is Gypsum ?

Last Answer : Moist calcium sulphate is called gypsum. Pure white gypsum is rarely found. Gypsum is a very important element for the plant body. It is used as fertilizer. In the production of plaster of Paris and ... is used to prepare the floor of the building , to increase the weight and smooth the paper.

Why is gypsum used in cement ?

Description : Why is gypsum used in cement ?

Last Answer : Gypsum is used to make cement slowly solidify. When the cement solidifies too fast, the amount of space inside the cement increases , the cement setting becomes weak and brittle. The use of gypsum in cement strengthens the setting of cement. As a result the cement is hard and long lasting.

What are the signs of gypsum ?

Description : What are the signs of gypsum ?

Last Answer : signal CaSO4.2H2O

Gypsum Of Signal What ?

Last Answer : Gypsum Of Signal CaSO4 .2H2O

What physical characteristics of gypsum can be described as nonmetallic?

Description : What physical characteristics of gypsum can be described as nonmetallic?

Last Answer : luster

Which of the following is a non-metallic mineral? (a) Bauxite (b) Magnesium (c) Gypsum (d) Manganese

Description : Which of the following is a non-metallic mineral? (a) Bauxite (b) Magnesium (c) Gypsum (d) Manganese

Last Answer : Ans: (c)

Which of the following can be used to correct acidic soil? (a) Gypsum (b) Lime (c) Vegetable compost (d) Calcium superphosphate

Description : Which of the following can be used to correct acidic soil? (a) Gypsum (b) Lime (c) Vegetable compost (d) Calcium superphosphate

Last Answer : Ans: (b)