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In the following question, two lists are given. List A contains types of “Soils” and List B contains the “Minerals” they are rich in. Match the two correctly and select the correct answer using the options given below.   List A List B  i. Alluvial soil a. Iron, Magnesia, Alumina ii. Black soil b. Iron oxide and Potash iii. Red soil c. Iron and Potash iv. Laterite Soil d. Potash and Lime
Which of the following statement(s) is/are correct?
1. If sodium carbonate and washing soda is mixed in water the hardness of water can be removed.
2. The reaction of the chemicals produce sodium sulphate, sodium carbonate and insoluble calcium carbonate.
3. Magnesium sulphate chloride and magnesium carbonate is also produced.
Select the correct answer
Which of the following are characteristics/properties of permanent hardness in water? (A) Presence of bicarbonates of calcium and magnesium (B) Presence of sulphates of calcium and magnesium (C) Forms good lather when comes in contact with soap (D) Presence of chloride of calcium and magnesium (E) Can be removed by boiling the water Choose the correct answer from the options given below :
An alloy of zinc, magnesium, and copper contains 80% of copper, 15% of zinc, and 5% of magnesium. The second alloy of copper and magnesium only is melted with the first and the mixture contains 75% of copper, 5% of zinc and 20% of magnesium. What is the percentage of magnesium in the second alloy?
Match the following classification of glasses with their specific uses: a. Soda lime glass 1. Used in the manufacturing of glass articles which have to withstand high temperatures. b. Potash lime glass 2. Used in the manufacturing of artificial gems, electric bulbs, lenses, Prisms, etc. c. Potash lead glass 3. Used in the manufacturing of glass tubes, laboratory apparatus, plate glass, window panels, etc. d. Common glass 4. Used in the manufacturing of medicine bottles
With reference to the 'Black Soil' which of the statement is/are correct? 1. These are known as regur. 2. They are rich in iron, lime, calcium and potash. Select the correct answer using the code given below :
Which of the following is/are correct about the Alluvial soil? I - Humus, lime, and organic matters are present in Alluvial soil. II - New alluvium is termed as Bhangar. III - Alluvial soil is rich in potash
Consider the following statements.
1. Among the fertilisers used, urea contains maximum percentage of Nitrogen.
2. The mixture of calcium sulphate is known as super phosphate of lime.
3. Potassium magnesium sulphate is called the muriate of potash.
Which of the statements given above are correct?
1. A student fitted the required apparatus to collect carbondioxide in the gas jars. 2. The student took out some substance from the bottle labelled calcium carbonate and put it in the woulfe's bottle. 3. Then the student poured some from the bottle labelled dilute hydrochloric acid on the calcium carbonate contained in the woulfe's bottle. 4. considering the above mentioned facts maximum how many hypotheses are possible relating to the causes of non-collection of the gas in the gas jar?
A rotary drum filter with 30% submergence is used to filter concentrated aqueous slurry of calcium carbonate containing 15lb of solids per cubic foot of water. The pressure–drop is 2011Hg. If the filter cake contains 50% mixture (wet basis), calculate the filter area required to filter 10 gal/min of slurry. The filter cycle time is 5 min. The specific cake resistance depends on the pressure–drop as: α (ft/lb) = α (Δp)0.26, where α = 2.90×1010 Viscosity of the filtrate = 6.72×10-4 lb/ft-s. Density of calcium carbonate = 168.8 lb/ft3. Neglect filter medium resistance.