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

Which of the following is not a compound of calcium? (a) Gypsum (b) Marble (c) Chalk (d) Molybdenum
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On heating, Gypsum loses certain percentage of its water content and becomes (1) Chalk (2) Calcium sulphate (3) Plaster of Paris (4) a pearl

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

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.

The stone whose crushing strength is least, is (A) Granite (B) Chalk (C) Marble (D) Slate

Description : The stone whose crushing strength is least, is (A) Granite (B) Chalk (C) Marble (D) Slate

Last Answer : Answer: Option B

Find the odd one: (1) Marble (2) Chalk (3) Limestone (4) Slaked lime

Description : Find the odd one: (1) Marble (2) Chalk (3) Limestone (4) Slaked lime

Last Answer : Slaked lime

To retard the initial setting time of cement, the compound responsible, is (A) Tri-calcium silicate (B) Gypsum (C) Di-calcium silicate (D) Tri-calcium aluminate

Description : To retard the initial setting time of cement, the compound responsible, is (A) Tri-calcium silicate (B) Gypsum (C) Di-calcium silicate (D) Tri-calcium aluminate

Last Answer : Answer: Option B

Which of the following mineral is used in cement industry and plaster of paris? A. Marble B. China Clay C. Gypsum D. Fire Clay

Description : Which of the following mineral is used in cement industry and plaster of paris? A. Marble B. China Clay C. Gypsum D. Fire Clay

Last Answer : ANSWER: C

Which of the following mineral is used in cement industry and plaster of paris? A. Marble B. China Clay C. Gypsum D. Fire Clay

Description : Which of the following mineral is used in cement industry and plaster of paris? A. Marble B. China Clay C. Gypsum D. Fire Clay

Last Answer : ANSWER: C

Based on the following rocks and minerals, select the correct statement, quartz, shale, basalt, granite, marble, gypsum, mica (A) Basalt and marble are the only metamorphic rocks (B) There is no sedimentary rock (C) Granite is the only igneous rock (D) Quartz and mica are minerals

Description : Based on the following rocks and minerals, select the correct statement, quartz, shale, basalt, granite, marble, gypsum, mica (A) Basalt and marble are the only metamorphic rocks (B) There is no sedimentary rock (C) Granite is the only igneous rock (D) Quartz and mica are minerals

Last Answer : Answer: Option D

Which among the following elements increases the absorption of water and calcium in plants? (1) Manganese (2) Boron (3) Copper (4) Molybdenum

Description : Which among the following elements increases the absorption of water and calcium in plants? (1) Manganese (2) Boron (3) Copper (4) Molybdenum

Last Answer : (2) Boron Explanation: Boron increases the absorption of water and calcium in the plants. It helps in the metabolic activities in plants. Boron is necessary in order for sugar to move through protoplasmic membranes.

Which among the following elements increases the absorption of water and calcium in plants ? (1) Manganese (2) Boron (3) Copper (4) Molybdenum

Description : Which among the following elements increases the absorption of water and calcium in plants ? (1) Manganese (2) Boron (3) Copper (4) Molybdenum

Last Answer : Boron

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

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

Last Answer : B. Gypsum salt (Answer)

What is the primary constituent of marble? w) Calcium carbonate x) Calcium sulfate y) Hydroxyapatite z) Chloroapatite

Description : What is the primary constituent of marble? w) Calcium carbonate x) Calcium sulfate y) Hydroxyapatite z) Chloroapatite

Last Answer : ANSWER: W -- CALCIUM CARBONATE

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)

Alkali soils are treated with gypsum to correct the deficiency of- (a) Sulphur (b) Calcium (c) Magnesium (d) Zinc

Description : Alkali soils are treated with gypsum to correct the deficiency of- (a) Sulphur (b) Calcium (c) Magnesium (d) Zinc

Last Answer : (b) Calcium

For reclamation of alkaline soil — is used. a. Lime b. Calcium carbonate c. Gypsum d. None of these

Description : For reclamation of alkaline soil — is used. a. Lime b. Calcium carbonate c. Gypsum d. None of these

Last Answer : c. Gypsum

Gypsum is chemically (A) Calcium chloride (B) Potassium sulphate (C) Sodium sulphate (D) Calcium sulphate

Description : Gypsum is chemically (A) Calcium chloride (B) Potassium sulphate (C) Sodium sulphate (D) Calcium sulphate

Last Answer : (D) Calcium sulphate

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

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

Last Answer : (B) Gypsum

Main constituents of Portland cement are calcium aluminate and (A) Gypsum(B) Silicates(C) Sodium silicate(D) Carbonates

Description : Main constituents of Portland cement are calcium aluminate and (A) Gypsum (B) Silicates (C) Sodium silicate (D) Carbonates

Last Answer : (B) Silicates

Pick up the correct statement from the following: (A) Calcium chloride acts as a retarder (B) Calcium chloride acts as an accelerator (C) Gypsum (calcium sulphate) acts as a retarder (D) Both (b) and (c)

Description : Pick up the correct statement from the following: (A) Calcium chloride acts as a retarder (B) Calcium chloride acts as an accelerator (C) Gypsum (calcium sulphate) acts as a retarder (D) Both (b) and (c)

Last Answer : (D) Both (b) and (c)

The most commonly used admixture which prolongs the setting and hardening time is (A) Gypsum (B) Calcium chloride (C) Sodium silicate (D) All of the above

Description : The most commonly used admixture which prolongs the setting and hardening time is (A) Gypsum (B) Calcium chloride (C) Sodium silicate (D) All of the above

Last Answer : (A) Gypsum

Setting time of cement increases by adding (A) Gypsum (B) Hydrogen peroxide (C) Calcium chloride (D) Sodium oxide

Description : Setting time of cement increases by adding (A) Gypsum (B) Hydrogen peroxide (C) Calcium chloride (D) Sodium oxide

Last Answer : Answer: Option A

The most common admixture which is used to accelerate the initial set of concrete is (A) Gypsum (B) Calcium chloride (C) Calcium carbonate (D) None of the above

Description : The most common admixture which is used to accelerate the initial set of concrete is (A) Gypsum (B) Calcium chloride (C) Calcium carbonate (D) None of the above

Last Answer : Answer: Option B

The most commonly used retarder in cement is (A) Gypsum (B) Calcium chloride (C) Calcium carbonate (D) None of the above

Description : The most commonly used retarder in cement is (A) Gypsum (B) Calcium chloride (C) Calcium carbonate (D) None of the above

Last Answer : Answer: Option A

Early attainment of strength in rapid hardening cement is mainly due to (A) Gypsum (B) Finer grinding (C) Tri-calcium silicate (D) Tri-calcium aluminate

Description : Early attainment of strength in rapid hardening cement is mainly due to (A) Gypsum (B) Finer grinding (C) Tri-calcium silicate (D) Tri-calcium aluminate

Last Answer : Answer: Option B

Setting time of cement increases by adding (i)gypsum (ii)sodium oxide (iii)calcium chloride [ A ] i [ B ] i and ii [ C ] i and iii [ D ] i, ii and iii

Description : Setting time of cement increases by adding (i)gypsum (ii)sodium oxide (iii)calcium chloride [ A ] i [ B ] i and ii [ C ] i and iii [ D ] i, ii and iii

Last Answer : [ A ] i

The Most common admixture used to accelerate the initial setting of concrete is a) Gypsum b) Calcium chloride* c) Calcium carbonate d) Calcium bicarbonate

Description : The Most common admixture used to accelerate the initial setting of concrete is a) Gypsum b) Calcium chloride* c) Calcium carbonate d) Calcium bicarbonate

Last Answer : b) Calcium chloride*

How is Calcium Sulphate (Plaster of Paris), CaSO4·½ H2O (hemihydrate of calcium sulphate) prepared from gypsum?

Description : How is Calcium Sulphate (Plaster of Paris), CaSO4·½ H2O (hemihydrate of calcium sulphate) prepared from gypsum? 

Last Answer : It is obtained when gypsum, CaSO4·2H2O, is heated to 393 K.   Above 393 K, no water of crystallisation is left and anhydrous calcium sulphate, CaSO4 is formed. This is known as dead burnt plaster'. ... quantity of water it forms a plastic mass that gets into a hard solid in 5 to 15 minutes.  

The pH of soil X is 7.5 while that of soil Y is 4.5. Which of the two soils, should be treated with powdered chalk to adjust its pH? (a) X only (b) Y only (c) Both X and Y (d) None of these

Description : The pH of soil X is 7.5 while that of soil Y is 4.5. Which of the two soils, should be treated with powdered chalk to adjust its pH? (a) X only (b) Y only (c) Both X and Y (d) None of these

Last Answer : (b) Y only

How can they get by with calling those disgusting little bits of chalk in breakfast cereal "marshmallows".

Description : How can they get by with calling those disgusting little bits of chalk in breakfast cereal "marshmallows".

Last Answer : Clearly you are hell bent on tormenting me. lol I can still FEEL in the depths of my brain and body the SOUND of those marshmallows in Lucky Charms cereal squeeking like against my teeth like little bits of plastic against your teeth. They are not meant to be edible.

Is there a substitute for chalk in the weight room?

Description : Is there a substitute for chalk in the weight room?

Last Answer : Have you tried the gloves with the fingers cut off ? I don't like that gloves eliminate the ability to feel, but with the open fingers you can feel and preserve your skin at the same time. ... , eventually your hands will toughen up - you will get calluses on your hands and the blisters will stop.

Who knows how to find artists doing chalk street drawings?

Description : Who knows how to find artists doing chalk street drawings?

Last Answer : Wow, I was going to say my daughter but I didn’t know about this competition. I think it’s an awesome idea and I hope you get valuable information. Good luck!

Do you believe in “signs” or do you just chalk it up as coincidence? What is the last thing you saw or has happened to you that you considered a sign to mean something else?

Description : Do you believe in “signs” or do you just chalk it up as coincidence? What is the last thing you saw or has happened to you that you considered a sign to mean something else?

Last Answer : As long as you don’t wake up at 3:00 AM every morning I think you will be okay. o.o As for signs, I missed the bus a couple times and took it as a sign to get up a few minutes earlier.

How does than new 3D chalk and paint work?

Description : How does than new 3D chalk and paint work?

Last Answer : I tried to find some today at the store but they don’t have it yet [equal] ( I want to get it for my son….... actually I really just want it for myself LOL

What type of root system deos a Chalk Maple have?

Description : What type of root system deos a Chalk Maple have?

Last Answer : Need Answer

Why do mountaineers use chalk powder ?

Description : Why do mountaineers use chalk powder ?

Last Answer : Mountain climbers use chalk powder to hold mountain peaks or mountain slopes well by foot and race.

Elo sahib from chalk after coat-pants after opening coat-pants irritates the eyes ?

Description : Elo sahib from chalk after coat-pants after opening coat-pants irritates the eyes ?

Last Answer : The answer is onion.

What is the meaning of the word ' chalk in hand ' ?

Description : What is the meaning of the word ' chalk in hand ' ?

Last Answer : The word ' chalk in hand ' means - beginning of education.

What is chalk made of ?

Last Answer : Chalk is made with calcium carbonate.

Where to buy chalk?

Description : For children

Last Answer : In stationery, toys. They tend to be different super-hyper.

what wax is used for resist in chalk painting

Description : what wax is used for resist in chalk painting

Last Answer : Need Answer

Dip a chalk in ink. What do you observe?

Description : Dip a chalk in ink. What do you observe?

Last Answer : Dip a chalk in ink. What do you observe?

What happens to pieces of chalk when they are shaken in jar with pebbles?

Description : What happens to pieces of chalk when they are shaken in jar with pebbles?

Last Answer : The chalk will be ground into chalk dust by the pebbles.

What unit is used to measure a piece of chalk?

Description : What unit is used to measure a piece of chalk?

Last Answer : Centimetres or millimetres would be used to measure the length and width (diametre) of a piece of chalk as used by a teacher in the school classroom. When I went to school in Liverpool, ... white chalk on a blackboard). But, the metric centimetres and millimetres would still be used nowadays.

How do you separate chalk from a mixture of chalk and water?

Description : How do you separate chalk from a mixture of chalk and water?

Last Answer : As with separating salt from a salty solution of water by evaporation, so, with a chalky solution, you would boil off the water, leaving the chalk behind.

Is chalk in water?

Description : Is chalk in water?

Last Answer : ghkjynhb jvyg jmhgjhbhfbjghn

How do you separate chalk pieces from water?

Description : How do you separate chalk pieces from water?

Last Answer : What is the answer ?

Is chalk in water?

Description : Is chalk in water?

Last Answer : ghkjynhb jvyg jmhgjhbhfbjghn

Can chalk split?

Description : Can chalk split?

Last Answer : no,Chalk can not split

Chalk?

Description : Chalk?

Last Answer : DefinitionChalk is a form of limestone. Chalk poisoning occurs when someone accidentally or intentionally swallows chalk.This is for information ... irritationGastrointestinal Abdominal painConstipationDiarrheaNauseaVomitingLungs and airways CoughShortness of breathHome TreatmentSeek imm

Is a white board a more environmentally friendly alternative to a chalk board?

Description : Is a white board a more environmentally friendly alternative to a chalk board?

Last Answer : White boards are more environmentally friendly because chalk leads to airborn dust being breathed into the lungs. It also eliminates the need for the manufacturing and shipping of chalk.

Swallowing chalk?

Description : Swallowing chalk?

Last Answer : DefinitionChalk is a form of limestone. Chalk poisoning occurs when someone accidentally or intentionally swallows chalk.This is for information only and not for use in the treatment or management of an actual poison ... Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.