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) […]

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 […]

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 […]

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 […]

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 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 […]

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 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. […]

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’ = […]

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 […]

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. […]

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 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, 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 […]

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 (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 […]

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, 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)}. […]

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 […]

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 […]