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Consider the following statements regarding removal of impurities from water: 1. Settleable solids are removed by filtration. 2. Volatile solids are removed through sedimentation. 3. Dissolved solids are removed through reverse osmosis. 4. Colloidal solids are removed by coagulation. Which of the above statements are correct?
In a batch process, the reaction takes place in the presence of an acid medium. The acid is drained from the reaction vessel at the rate of 15ml/s as a result of the density difference of the acid from the reacting component. To avoid wastage of acid, it is recycled to an acid tank which has 1000 L capacity. The acid drained from the reaction vessel, picks up 50 g/L solids from the reactor. Acid is fed once again to the process from acid tank. When the process is started, the acid is almost pure in the tank as a result of filtration. As the reaction proceeds, acid in the tank gets more and more contaminated with the solids. The concentration of the solids should not exceed 100 g/L from the process point of view. The batch time is 16h. Estimate whether the concentration of the solids will exceed 100g/L during the batch reaction.
The propositions are
1. The general property in goods can be with one person while the special property in the same goods be with the another person.
2. The transfer of general property in goods to one person can be done subject to a special property in the same goods in another person.
3. The special property in goods can be only with the person having general property in goods.
In respect of the aftersaid proposition which of the following is true
Two statements are given followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: All liquids are solids. All gases are solids. Conclusions: I. Some solids are liquids. II. Some liquids are gases. III. No liquid is gas.
The domestic sewage of a town was tested for total solids and the following results were obtained : Weight of sample of sewage = 1000 gm Weight of solids after evaporation of liquid = 0.952 gm Weight of dry residue after ignition = 0.516 gm What is the value of volatile solids?
Consider the following statements in respect of anaerobic sludge digester: 1. It is less expensive compared to several other methods available. 2. Processing of separable solids impacts the environment to a minimum. 3. Quantity of separated solids requiring disposal is minimal 4. Digested sludge is very readily dewatered able. Which of the above statements are correct?
Which of the following statement(s) is/are true? A: Compressibility: The property of matter due to which its shape does not change after applying external force. Solids show this property. B: Fluidity: It is a property of matter to flow easily and change shape under external force. This property is exhibited by both liquid and gas.
Which of the following statements is/are true? A. Rigidity: It is the property of matter to maintain its shape even if external force work on it and solids show this property. B. Fluidity: It is the property of a substance to easily flow and allow change in its shape under external forces and this property is exhibited both by liquids and gasses. 
Consider the following statements regarding the theory of linkage and choose the correct answer:
1. Genes are arranged in a linear fashion in the chromosomes
2. Genes that show linkage are situated in the chromosome
3. Linked genes remain in their original combination during the course of inheritance
4. The genes which are widely separated show strong linkage, while those closely located, have more chances to get separated by crossing over
Consider the following statements regarding ores: i. Highly reactive metals are separated from their ores by electrolysis. ii. Metals of medium reactivity are separated from their ores by reduction. iii. Metals of least reactivity are separated from their ores by roasting