Pick up the correct statement from the following: (A) Lime is available in Free State (B) Lime is available by dissolving calcium carbonate in water (C) Lime is available by calcining calcium carbonate at 900°C (D) Lime is nothing but calcium chloride

Pick up the correct statement from the following:
(A) Lime is available in Free State
(B) Lime is available by dissolving calcium carbonate in water
(C) Lime is available by calcining calcium carbonate at 900°C
(D) Lime is nothing but calcium chloride
by

1 Answer

Answer :

Answer: Option C
by

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The property by virtue of which lime sets under water, is known as (A) Slacking (B) Setting (C) Hydraulicity (D) Calcining

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Consider the following statements: 1. Bordeaux mixture consists of sodium bromide and lime 2. Toothpastes contain calcium carbonate 3. Zinc amalgam is used in dental fillings 4. Liquid sodium is used as a coolant in nuclear reactors The correct statements are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only

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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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Pick up the correct statement from the following: (A) The free quartz suddenly expands at a temperature lower than 600°C (B) The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2 (C) The sand stone with silicates resist a fire in a better way (D) All the above

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What is the most common salt in sea water? (1) Calcium carbonate (2) Potassium chloride (3) Sodium chloride (4) Magnesium sulphate

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Pick up the correct statement from the following: (A) The lime in excess makes the cement unsound and causes the cement to expand and disintegrate (B) The silica in excess makes the cement stronger but its setting time also increases (C) The excess amount of alumina weakens the cement (D) All the above

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Last Answer : (D) All the above 

Pick up the correct statement from the following: (A) Lime may be used to soften the hard water (B) Excessive use of lime may kill the bacterias (C) Excessive lime when added to water, raises its pH value (D) All the above

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An aqueous solution of sodium chloride is prepared by dissolving 10kg of sodium chloride in 50 kg of water find (i) Weight % (ii) Mole % of solution. [Atomic weight of Na = 23, Cl = 35.5]

Description : An aqueous solution of sodium chloride is prepared by dissolving 10kg of sodium chloride in 50 kg of water find (i) Weight % (ii) Mole % of solution. [Atomic weight of Na = 23, Cl = 35.5] 

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Chemical name of vinegar is -------? A. Sodium Nitrate B. Dilute acetic acid (Answer) C. Chloride of lime D. Calcium E. None of these

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Pick up the correct statement from the following: (A) Bricks are paid per thousand (B) Cement is paid per 50 kg bag (C) Lime is paid per quintal (D) All the above

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Last Answer : Answer: Option D

Pick up the correct statement from the following: (A) The percentage of absorption for firebricks varies from 5 to 10 (B) The percentage of silica in silica bricks is to the extent of about 95 to 97 percent (C) Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material (D) All the above

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Last Answer : Answer: Option D

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Last Answer : Answer: Option D

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Last Answer : Answer: Option D

Pick up the correct statement from the following: (A) Lime mortar with cement in the ratio of in 10 is cheaper and better for outside plaster (B) For very cold or very hot climate, a compact and closed plan should be provided (C) On the sea coast, an exposed and open house is generally preferred (D) All the above

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Last Answer : Answer: Option D

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. Heating of ortho-phosphoric acid to about 900°C, produces (A) Meta-phosphoric acid (B) Pyrophosphoric acid (C) No change in it (D) None of these

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Last Answer : (A) Meta-phosphoric acid

Pick up the correct statement from the following: (A) If the image of the object does not fall on the plane of the cross-lines, parallax exists (B) Parallax has nothing to do with the eyepiece (C) The eyepiece is adjusted for clear vision of the cross hairs (D) All the above

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Last Answer : (D) All the above

Dolomite is a lime stone which contains carbonate of magnesia upto (A) 15 % (B) 20 % (C) 25 % (D) 45 %

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Last Answer : Answer: Option D

Pick up the correct statement from the following: (A) Sand obtained from pits, is washed to remove clay and silt (B) Sand obtained from flooded pits, need not be washed before use (C) The chloride in sea shore sand and shingle may cause corrosion of reinforcement if the concrete is porous (D) All the above

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Last Answer : Answer: Option D

In a rock calcium carbonate predominates. State whether it is: (A) Siliceous rock (B) Argillaceous rock (C) Calcareous rock (D) None of these

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Last Answer : Answer: Option C

Shaft furnaces are used for (A) Smelting (B) Calcining (C) Roasting (D) All (A), (B) and (C)

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Pick up the correct statement from the following: (A) Melamine is obtained from calcium carbide (B) Formaldehyde is prepared synthetically from methane (C) The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin (D) All the above

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Last Answer : Answer: Option D

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