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

DPP – 10S61 Control & Coordination     1. Define coordination.   2. Differentiate between vertebral column and spinal cord.   3. Differentiate between neuron and nerve.   4. What do you mean by nervous system explain nervous system by the help of diagram.   5. What are receptors? Explain any two receptors.   6.

DPP -10S53 Life Process       1. Explain the process of transpiration in plants and its significance.     2.Describe the role of xylem and phloem in plant transportation.     3. Explain the process of blood clotting.     4. Explain how oxygen and carbon dioxide are transported in the blood.    

DPP -9S54 CELL – Fundamental unit of Life       1. Which one of the following is NOT a part of the nucleus?   Ribosome Nucleolus Chromosome Gene     2. Why is the cell wall present in plant cells and not in animal cells ?     3. Write a short note on:

DPP – 9S53 CELL : The fundamental unit of life       1. Describe the structure of the nucleus with the help of a diagram.     2. Explain the process of endocytosis (with diagram).     3. Which of the following is not correct?   (a) Robert Brown discovered the cell.   (b) Schleiden