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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 Answer: Gravitation (Std 10 Science Part 1, Chapter 1) - solved exercise notes. 1. Match the entries and rewrite them in correct rows Quanti... 2
- M.In two moles of acetaldehyde (CH3 CHO) calculate the following a. Number of moles of carbon b. Number of moles of hydrogen Answer: (a) 4 mol C, (b) 8 mol H, (c) 2 mol O, (d) 1.2044 × 10²⁴ molecules Molecular formula of acetaldehyde: CH₃CHO = C₂H₄O. One molecule (... 1
- Niobium forms bcc structure the density of niobium is 8.55 g/cm3 and length of unit cell edge Answer: In 0.5 g of niobium there are 1.62×10²¹ unit cells and 3.24×10²¹ atoms. Given: bcc so n = 2 atoms per unit cell, ρ = 8.55\ g cm⁻³, a... 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. Answer: Radius of iridium atom r ≈ 136\ pm (edge length a ≈ 385\ pm) Given: ρ = 22.4\ g cm⁻³, M = 192.2\ g mol⁻¹, fcc unit cell so n = 4 ato... 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 numbe... 1
Recently answered
See all →- In which of the following options the order of arrangement does not agree with the variation of property indicated against it ? Correct options: (2) and (3) both do not agree with the stated trend Option 1: mathrmAl³⁺, Mg²⁺, Na^+, F^- are isoelectronic (10 electrons).... 1
- find laplace transform of the following question mathcalL\e^(-2t)cos² t\ = ((s+2)²+2)/((s+2)[(s+2)²+4]) Step 1: Reduce cos² t. Using cos² t = (1+cos 2t)/2, e^(-2t)cos² t = 1/2(e^(-2t) + e^(... 1
- In the given figure, which component has thin outer walls and highly thickened inner walls? Correct option: (2) C Key idea: In a stoma of a dicot leaf, each bean-shaped guard cell has a thin outer wall (away from the pore) and a hig... 1
- Identify the part of the seed from the given figure which is destined to form root when the seed germinates. Correct option: (4) C Key idea: The figure is a longitudinal section of a monocot (maize) grain. Its embryo axis has a shoot end and a root... 1
- Choose the correct circuit which can achieve the bridge balance. Correct option: (1) circuit (1) Key idea: A Wheatstone bridge is balanced (no current through G) when P/Q=R/S. In every circuit the arms are... 1
- Which amongst the following will be most readily dehydrated under acidic conditions ? Correct option: (3) pentane-2,4-diol (the structure with two OH groups and no NO ₂) Key idea: Acid-catalysed dehydration of an alcohol goes... 1
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See all →- Tourism, Transport and Communication Class 10 Notes, Questions | SSC Geography SSC Class 10 Geography Ch 9 notes: tourism, transport and communication in India and Brazil, IST vs BRT, key terms and exam Q&As.
- Economy and Occupations Class 10 Notes, Questions | SSC Geography SSC Class 10 Geography Chapter 8 notes: India vs Brazil economy, sectors, 2016 GDP data, agriculture, mining, fishing, key terms and exam qu...
- Human Settlements Class 10 Notes, Questions | SSC Geography SSC Class 10 Geography Chapter 7 Human Settlements notes: nucleated vs dispersed settlements, urbanisation in India and Brazil, terms and ex...
- How to Use NEET Previous Year Questions: A 4-Month Plan A month-by-month plan to use NEET previous year questions: unit-wise practice, timed sectionals, full mocks, a mistake notebook and a syllab...
- NEET Previous Year Papers 2016–2025: What 10 Years of Questions Show We tagged 2,060 questions from official NEET papers 2016–2025. See which Physics, Chemistry and Biology units grew or shrank, and what staye...
- Topics Removed from the NEET Syllabus (and How Many Questions They Had) All topics removed from the NEET syllabus, with how many questions each had in official 2016–2025 papers, and how to practise old papers.