Doubtly
@Doubtly · Joined Feb 2021
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- The physical quantities not having same dimensions are torque and work Correct option is 2) momentum and Planck's constant Momentum = mv = [MLT^(- 1)] Planck's constant, h = E over v=[ML²T^(- 2)] over [T^(- 1)]=... 1
- Dimensions of 1/u0E0 where symbols have their usual meaning, are Correct option is C ) [ L²T⁻² ] Explaination:: The velocity of light in vacuum is c = 1 over sqrt μ ₀ε ₀ therefore[1 over μ ₀ε ₀] = [c²] = [... 1
- let a=j-k and c=i-j-k. then the vector b satisfying ab+c=0 and a.b=3 is Option 1 is correct -i+j-2 k Explaination:: a x b + c = 0 a x (a x b) + a x c = 0 (a.b)a - (a.a)b + a x c = 0 3a - 2b + (-2i - j - k) = 0 2b... 1
- If u , v ,w are non-coplanar vectors and p,q are real numbers, then the equality Correct option is 3) exactly one value of (p,q) Explaination: 1
- Identify from the following the isoelectronic species: Ne, O2-, Na+ OR Ar, Cl2-, K⊕ Atoms and ions having the same number of electrons are isoelectronic Species and No. of electrons Ne =10 O²⁻ 8 + 2 = 10 Na⁺ 11 − 1 = 10 Ar 1... 1
- Give the names of quantum numbers. The four quantum numbers are principal quantum number (n), azimuthal or subsidiary quantum number (l), magnetic quantum number (m_l), and el... 1
- State Heisenberg uncertainty principle. Heisenberg's uncertainty principle states that “It is impossible to determine simultaneously, the exact position and exact momentum (or velo... 1
- Name the element that shows simplest emission spectrum. Hydrogen shows the simplest emmission spectrum 2
- If an element ‘X’ has mass number 11 and it has 6 neutrons, then write its representation. The representation of the given element is ¹¹₅X 1
- 4. Match the following : Element No. of Neutron a. ⁴⁰₁₈AR iv. 22 b. ¹⁴₆C iii. 8 c. ⁴⁰₁₉K ii. 21 d. ¹⁴₇N i. 7 1
- Complete the following information about the isotopes in the chart given below : Substance Mass Number Number of Protons Neutrons Electrons Carbon-14 14 6 8 6 Lead-208 208 82 126 82 Chlorine-35 35 17 18 17 Uranium-238 238... 1
- Make the pairs: neutrons six electrons Answer:: ‘A’ ‘B’ a. Neutrons iv. Chadwick b. p-orbital i. six electrons c. charge on electron ii. -1.6×10⁻¹⁹ C d. Lyman series iii. Ultravio... 1
- Principal Quantum number describes a. shape of orbital b) size of the orbital 2
- “No two electrons in the same atoms can have identical set of four quantum numbers”. This statement is known as - a. Pauli’s exclusion principle 2
- p-orbitals are....... in shape. a. spherical b. dumb bell c. double dumbell d. diagonal b. dumb bell 2
- The value of Plank’s constant is - A) 6.626 × 10⁻³⁴Js 2
- The energy difference between the shells goes on ........... when moved away from the nucleus. b) decreasing 2
- [Science 2]SSC Science Question Paper 2020 - Part 2 - March - English Medium - Std 10th Maharashtra Board [Science 2]SSC Science Question Paper 2020 - Part 2 - March - English Medium - Std 10th Maharashtra Board To view online View To download fo... 1