Solutions
Solutions is a Aptitude concept from the MPSC syllabus, tested in 3 past MPSC questions (2013, 2014, 2017). Below are those real questions with their correct answers and explanations.
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Real questions that test this
एका कॅनमध्ये A आणि B या दोन द्रवांचे मिश्रण 7 : 5 या प्रमाणात आहे. जेव्हा त्यातील 9 लिटर मिश्रण काढून घेतले आणि B द्रवामाने तो कॅन पूर्णपणे भरला तर A आणि B चे प्रमाण 7 : 9 झाले. तर त्या कॅनमध्ये सुरवातीला A चे द्रवण किती असेल ? A can contains a mixture of two liquids A and B in the ratio 7 : 5. When 9 litres of the mixture is drawn off and the can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the can initially ?
Using the replacement formula or ratio method, when 9 litres of mixture is replaced with liquid B multiple times, the initial quantity of liquid A can be found by working backwards from the final ratio 7:9.
खालीलपैकी शुद्ध पदार्थ कोणता ? / Indicate which of the following is a pure substance ?
(a)लोह / Iron
(b)पेट्रोल / Gasoline
(c)गाईंचे दूध / Cow's milk
(d)समुद्राचे पाणी / Sea Water
Iron (लोह) is a chemical element and therefore a pure substance, whereas gasoline, cow's milk, and sea water are mixtures containing multiple components.
कोणते मिश्रण नाही ? What is not a mixture ?
Water (H2O) is a chemical compound, not a mixture, as its constituents are combined in a fixed chemical proportion.