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See all →- A and B each have certain number of oranges. A says to B, “ if you give me 10 of your oranges, Suppose A has x no. of oranges and B has y no. of oranges. According to the given conditions, we have x+10=2(y−10)⇒x−2y+30=0 (i) and, y+10=x... 1
- std 10th maharashtra board science part 1 gravitation notes Download pdf for offline study 1. study the entries in the following table and rewrite them putting the corrected items in a single row :gra... 2
- Niobium forms bcc structure the density of niobium is 8.55 g/cm3 and length of unit cell edge the correct answer is 1.62 × 10²^(1 ) EXplaination ^() 2
- The density of iridium is 22.4 g/cm3 . The unit cell of iridium is fcc. Calculate the radius of iridium atom. Molar mass of iridium is 192.2 g/mol. The correct answer is 136 pm Explanation:: 1
- E. A student used a carbon pencil to write his homework. The mass of this was found to be 5 mg. With the help of this calculate. Given : mass of carbon = 5mg = 5× 10⁻³ g Atomic mass of carbon=12u Solution :: a. The number of moles of carbon in his homework writing numb... 1
- M.In two moles of acetaldehyde (CH3 CHO) calculate the following a. Number of moles of carbon b. Number of moles of hydrogen a) Number of moles of carbon 1 molecule of CH3CHO contains 2 C-atoms. Therefore, 2 mol of CH3CHO contains 2×2 = 4 moles of Carbon. b) Number... 1
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See all →- Fly ash is a pollutant mainly produced by Answer: D. coal-based thermal power plants Burning coal leaves fine ash particles (fly ash) that pollute air, water and soil. 1
- Solar cells are commonly made from Answer: B. silicon Solar cells are mostly made from the semiconductor silicon. 1
- Which of the following is NOT a source of green energy? Answer: B. Coal-based thermal power Burning coal releases CO₂ , sulphur oxides and fly ash, which harm the environment. 1
- The main constituent of biogas is Answer: C. methane Biogas contains mostly methane, along with some carbon dioxide. 1
- The main constituent of natural gas used in gas-based power plants is Answer: A. methane Natural gas is mainly methane. 1
- The correct order of energy conversion in a coal-based thermal power plant is Answer: B. chemical → heat → kinetic → electrical Chemical energy of coal becomes heat (steam), the steam turns the turbine (kinetic), and t... 1
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See all →- SSC 10th Last-Month Revision Plan and Mistakes to Avoid A four-week last-month revision plan for Maharashtra SSC: daily routine, subject-wise tips, timed board papers and the exam mistakes that co...
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