Author name: Jai Sir

DPP – 11B21 BIOLOGICAL CLASSIFICATION       Q1. Define experimental taxonomy?   Q2. What are red tides? Why are they caused & why are they harmful?   Q3. Viruses and viroids differ in structure and disease they cause. How?   Q4. Give one example of fungus as a source of antibiotics?   Q5. Explain […]

DPP – 9S21 IS MATTER AROUND US PURE?   Q1. Difference between pure and impure, element and compound, compound and mixture?   Q2. Which of the following materials fall into the category of “pure substance”?   (a) Ice (b) Milk (c) Iron (d) Hydrochloric acid (e) Calcium oxide (f) Mercury (g) Brick (e) Wood (f)

DPP – 11C26 De Broglie & Heisenberg Uncertainty Principle     Q1. Calculate the mass of photon with λ = 3.6 Å. (Ans : m = 6.1 × 10-29 𝐾𝑔 )   Q2. Calculate wavelength if kinetic energy is 3.0 × 10-25𝐽. ( Ans : 𝜆 = 8967 × 10-9 𝑚 )   Q3. Two particle A &

DPP – 11C25 Bohr’s Model   Q1. Calculate energy of electron in 2nd orbit of He+ also calculate the radius. (Ans: 𝐸2  = –2.18 × 10−18 J/atom, 𝑟2 = 105.8 pm)   Q2. Calculate the energy required to remove an electron from 2nd orbit to 4m orbit also calculate the wavelength associated with it. (Ans: △E =

  DPP – 11C24 Hydrogen Spectrum     Q1. Calculate the wavelength of light emitted in Hydrogen atom if electron undergoes transition from 2nd to 4th orbit. (Ans: 486 × 10−7 cm)   Q2. What transition in the Hydrogen Spectrum would have the same wavelength as the Balmer Series in the 𝐻𝑒+ is the electron comes form

DPP – 11C22 Planks Quantum Theory & Electromagnetic Wave Theory     Q1. 100 watt monochromatic light λ = 400 nm. Calculate number of photons emitted per second by bulb. (Ans: 2012 × 1017 per second)   Q2. If time period is 2 × 10–10 sec. Calculate λ, Frequency, wave number.  (Ans: ν = 5 × 109

DPP – 11C23 PHOTOELECTRIC EFFECT     Q1. If Threshold frequency is 7 × 10 14 𝑠𝑒𝑐 -1. Calculate the kinetic energy if frequency of the radiation is 1 × 1015 𝑠𝑒𝑐-1 . (Ans – 19.8 × 10−20 J )   Q2. Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of λ

DPP -10S22 PROPERTIES OF ACIDS AND BASES Q1. Complete the Reaction : (i) 𝑍𝑛 + 𝐻2𝑆𝑂4 → (ii) 𝐴𝑙 + 𝐻𝑁𝑂3 → (iii) 𝐻𝐶𝑙 + 𝐾2𝑂 → (iv) 𝐻𝐶𝑙 + 𝐴𝑙2(𝐶𝑂3)3 → (v) 𝐻𝐶𝑙 + 𝐹𝑒(𝐼𝐼) → (vi) 𝑁𝑎𝑂𝐻 + 𝑍𝑛 → (vii) 𝑁𝑎𝑂𝐻 + 𝐻2𝑆𝑂4 → (viii) 𝐻𝐶𝑙 + 𝑀𝑔 → (ix) 𝑁𝑎𝐻𝐶𝑂3 +

DPP -10S21 INDICATOR, pH & DILUTION     1. You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?  

DPP – 9S61 Tissues   1. What is a tissue?   2. What is the utility of tissues in multicellular organisms?   3. What are meristematic tissues? What is it’s importance in plant body explain by the help of its three types.   4. Write a short note on:- Endoplasmic Reticulum Cell division Golgi apparatus