Q – 3.1. How would you determine the standard electrode potential of Mg2+ 1 Mg ? Ans. We will set up a cell consisting of Mg l MgSO4 (1 M) as one electrode ( by dipping a magnesium wire in 1 M MgSO4 solution) and standard hydrogen electrode Pt, H2 (1 atm) H+ (1 M) […]
NCERT Physics 12 Electrostatic Potential and Capacitance Chapter 2 Exercise
Physics class 12 electrostatic potential and capacitance chapter 2 solution is here in this website. Also you can download sample paper from NCERT physics class 12. NCERT Physics 12 Electrostatic Potential and Capacitance Chapter 2 Exercise Q.1. Two charges 5 10-8 C and -3 10-8 C are located 10 cm apart. At what points on […]
Biology Reproductive Health Chapter 4 – Exercise
Biology Reproductive Health Chapter 4 – Exercise – NCERT Biology reproductive health exercise completed here read them carefully and these are useful for cbse 12 board exams and other competitive exams. Q.1. what do you think is the significance of reproductive health in a society. ans. Rapidly expanding human population, particularly, in the developing countries […]
Biology 12 Environmental Issues Chapter 15 – Exercise
Q 1. What are the various constituents of domestic sewage? Discuss the effects of sewage discharge on a river. Ans 1. The domestic waste contains everything that down the drain into the sewer of the house. Suspended solids are soil particles (sand and silt), inorganic colloidal particles (e.g., clay) and organic colloidal matter (faecal matter, […]
NCERT 12 Physics Alternating Currents Chapter 7 Exercise
Q.1. A 100 Ω resistor is connected to a 220 V, 50 Hz ac supply.220 (a) What is the rms value of current in the circuit ? (b) What is the net power consumed over a full cycle ? Q.2. (a) The H inductor is connected to 220 V, 50 Hz a. c. supply. Determine […]
NCERT 12 Physics Dual Nature Of Radiation And Matter Chapter 11 Exercise
Q.1. find the (a) maximum frequency and (b) minimum wave-length of X- rays produced by 30 KV electrons. Given, h = 6.6310-34 Js. Q.2. the work function of caesium metal is 2.14 eV. When light of frequency 6⨯1014 Hz is incident on the metal surface, photoemission of electrons occurs. What is the (a) maximum kinetic […]
NCERT 12 Chemistry Surface chemistry Chapter 5 exercises 2
Q – 5.1. Distinguish between the meaning of the terms adsorption and adsorption. Give one example of each. Ans. Adsorption – 1. It is a surface phenomenon, i.e., it occurs only at the surface of the adsorbent. 2. In this phenomenon, the concentration on the surface of adsorbent is different from that in the bulk. […]
NCERT 12 Maths Solutions of Inverse Trigonometric Functions – Chapter 2 (Ex.2.1)
NCERT 12 Maths Inverse Trigonometric Functions – Chapter 2 (Ex.2.1), NCERT Class 12 maths chapter 2 solutions. Direction (Q. No. 1 to 10) Find the principal values of the following questions. Direction (Q. Nos. 11 to 14) Find the values of the following questions: Direction (Q. Nos. 11 to 14) Find the values of the […]
Biology 12 Microbes In human Welfare Chapter 10 – Exercise
Q 1. Bacteria can’t be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes under a microscope, which sample would you carry and why? Ans 1. The common […]
NCERT Physics 12 Electrostatic Charges and Fields Chapter 1 – Exercise
NCERT physics class 12 chapter 1 all important questions and solutions are here, check the details of MCQ questions physics class 10th, cbse class 12 important questions pdf. Below we have also given, long answer type questions and solutions for each pdf. NCERT Physics 12 Electrostatic Charges and Fields Chapter 1 – Exercise Q.1. What […]
chemistry 12 solid state chapter 1 – exercise 1
CHEMISTRY NCERT EXERCISES WITH ANSWERS Q – 1.1 Why are solids rigid? Ans. In a solid, the constituent particles are very closely packed. Hence, the forces of attraction among these particles are very strong. Moreover, the constituent particles in solid have fixed position and can only oscillate about their mean positions. Hence, they are rigid. […]
Biology Human Reproduction Chapter 3 – Exercise
Q.1 Fill in the blanks: (a) Humans reproduce …………. (asexually/sexually) (b) Humans are …………. (oviparous/viviparous/ovoviviparous) (c) Fertilization is …………. in humans (external/internal) (d) Male and female gametes are …………. (diploid/haploid) (e) Zygote is …………. (diploid/haploid) (f) The process of release of ovum from mature follicle is called …………. (g) Ovulation is induced by a hormone […]
NCERT 12 Maths Matrices Chapter 3 – Exercise 3.3
Directions (Q. No. 11 and 12) Choose the correct answer in the following questions: 11. If A, B are symmetric matrices of same order, then AB-BA is a (i) Skew-symmetric matrix (ii) Symmetric matrix (iii) Zero matrix (iv) Identity matrix Sol. Given, a and B are symmetric matrices → A’ = A and B’ = […]
NCERT 12 Physics Electromagnetic Induction Chapter 6 Exercise
Q.1. Predict the direction of induced current in the situations described by the following (a) to (f). Sol. (a) South pole develops at q, current induced must be clockwise at q. In the coil, induced current is from p to q. (b) Coil p q in the would develop S – pole at q and […]
Biology 12 Strategies for Enhancement in Food Production Chapter 9 – Exercise
Strategies for Enhancement in Food Production Chapter 9 – Exercise Q 1. Explain in brief the role of animal husbandry in human welfare. Ans 1. Animal husbandry includes feeding, breeding and raising animals livestock whose primary purpose is to provide milk and meat. Milk is considered as the ‘most nearly perfect’ food for human consumption […]
NCERT 12 Maths Matrices Chapter 3 – Exercise 3.4
Now, in the above equation, we can see all the elements are zero in the second row of the matrix on the LHS. Therefore, A-1 does not exist. Note: Suppose A = IA, after applying the elementary transformation, if any row or column of a matrix on LHS is zero, then A-1 does not exist. […]
NCERT 12 Chemistry General Principles and Processes Of Isolation of Elements Chapter 6 Exercise 2
Q.6.1. Which of the ores mentioned in Table 6.1 page 6/2 can be concentrated by magnetic separation method ? Ans. Ores which are magnetic in nature can be separated from the non-magnetic gangue particles by magnetic separation. For example, ores of iron such as haematite (haematite (Fe2O3), magnetite ( FeCO3) and iron pyrites(FeS3) being magnetic […]
NCERT Biology 12 Evolution chapter 7 – Exercise
Biology 12 Evolution chapter 7 – Exercise Q 1. Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory. Ans 1. When a bacterial population encounters a particular antibiotic, those sensitive to it die. One or few bacteria having mutations which make them resistant to antibiotic, survive. Such resistant bacteria multiply quickly as […]
NCERT 12 Maths Solutions of Relations and Functions – Chapter 1 Ex 1.4
NCERT 12 Maths Solutions of Relations and Functions – Chapter 1 Ex 1.4 Q 1. Determine whether or not each of the definition of * given below gives a binary operation. In the event that * is not a binary operation, give justification for this. i. On Z+, defined * by a* b = a- […]
NCERT 12 Physics Wave Optics Chapter 10 Exercise
NCERT 12 Physics Wave Optics Chapter 10 Exercise, whole exercise is covered in this page. So you only need to have a look on it and get to know what to do next. We have chapter wise ncert 12 physics solutions. Now you don’t need to be wander everywhere so you will not found any […]
NCERT 12 Chemistry Surface chemistry Chapter 5 exercises 1
Q – 5.1. Why are substances like platinum and palladium often used for carrying out electrolysis of aqueous solution? Ans. Platinum and palladium form inert electrodes, i.e., they are not attacked by the ions of the electrolyte or the products is an electrolysis. Hence, they are used as electrodes for carrying out the electrolysis. Q […]
Chemistry 12 Solid State Chapter 1 – Exercise 2
NCERT EXERCISES Chapter – 1 (Exercise 1.2) Q – 1.1 Describe the term ‘amorphous’. Give a few examples of amorphous solids. Ans. Amorphous solids are those solids in which the constituent particles may have a short range order but do not have a long range order. They have irregular shapes and are isotropic in nature. […]
chemistry 12 solution chapter 2 exercise-2
CHEMISTRY (CHAPTAR 2) NCERT EXERCISES WITH ANSWERS EX 2.2 Q – 2.1 Define the term solution. How many types of solution are formed? Write briefly about each type with an example. Ans. A solution is a homogeneous mixture of two or more chemically non-reacting substances whose composition can be varied within creation limits. Types of […]
NCERT 12 Physics Magnetism And Matter Chapter 5 Exercise
Q.1. Answer the following questions regarding earth’s magnetism. (a) A vector needs three quantities for its specification. Name the three independent quantities conventionally used to specify the earth’s magnetic field. (b) The angle of dip at a location in southern India is about 180. Would you expect a grater or lesser dip angle in Britain […]
NCERT Class 12 Maths Solutions of Relations and Functions – Chapter 1 Ex 3
NCERT Class 12 Maths Solutions of Relations and Functions – Chapter 1 Ex 3, Q 1. Let f : {1, 3, 4} → {1, 2, 5} and g : {1, 2, 5} → {1, 3} be given by f : {(1, 2), (3, 5), (4, 1) and g : {(1, 3), (2, 3), (5, 1)}. […]
NCERT 12 Chemistry Electrochemistry Chapter 3 exercises 2
Q – 3.1. Arrange the following metals in the order in which they displace each other from the solution of their salts: Al, Cu, Fe, Mg, and Zn. Ans. Mg, Al, Zn, Fe, Cu, Ag Q – 3.2. Given the standard electrode potentials K+/K = – 2.93 V, Ag+/Ag = 0.80 V, Hg2+2 / Hg […]
NCERT 12 Maths Determinant Chapter 4 – Exercise 4.1
Biology Sexual Reproduction in Flowering Plants Chapter 2 – Exercise
Biology Sexual Reproduction in Flowering Plants Chapter 2 – Exercise : NCERT solutions of Biology chapter 2 exercises. We mentioned all important questions below check them, Or you can just directly download question paper. But you will get solutions in this page only. So you can book mark this page and you will find it easily. […]
NCERT 12 Maths Inverse Trigonometric Function Chapter 2 – Exercise 2.2
NCERT 12 Chemistry Chemical Kinetics Chapter 4 exercises 1
Q – 4.1. For the reaction R ⟶ P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and seconds. Q – 4.2. In a reaction, 2 A ⟶ Products, the concentration of A decrases from […]