Bihar board solutions lecture 3(crash course series)

What final product(s) is/are formed in the following series of reactons ? Concentrated borax solution + silver nitrate solution to Precipitate underset("boiling")overset(H_(2)O)to Products (final)

In the following system of equations determine whether it has unique solution, no solution or infinitely many solutions. In case there is a unique solution, find it: x-3y=3,\ \ \ \ 3x-9y=2

Molality of aqueous solution of urea is 3.The mass percentage of urea in the solution is

(a) Which metal in the first transition series (3d series) exhibits +1 oxidation state most frequently and why? (b) Which of the following cations are coloured in aqueous solutions and why? Sc^(3+),V^(3+),Ti^(4+),Mn^(2+)(At. "no".Sc=21,V=23,Ti=22,Mn=25)

In a class 140 students numbered 1 to 140, all even numbered students opted Mathematics course, those whose number is divisible by 3 opted Physics course and those whose number is divisible by 5 opted Chemistry course. Then the number of students who did not opt for any of the three courses is (a) 38 (b) 1 (c)42 (d) 102

A menu offers 2 entrees, 3 main courses, and 3 desserts. How many different combinations of dinner can be made? (A dinner must contain an entrée, a main course , and a desert.)

In some schools, AP courses, honors coures, and college prep courses carry different weights in the computation of grade point averages. A given grade may carry a weight of 2 in an AP course, a weight of 1.5 in an honors course, and a weight of 1 in a college prep course. Suppose letter grades of A, B, C, D, and F are assigned values of 4, 3, 2, 1, and 0. A student completes 6 courses with grades of a B and a C in 2 AP courses, an A and a C in 2 honors courses, and 2 As in college prep courses. What would that student's grade point average be?

A horizontal board is oscillating with an amplitude of 3 m. If the frequency of oscillation is 15 per minute, find the minimum value of coefficient of friction in order that a body placed on the board will A not slide when the board oscillates ?

On passing 0.5 mole of electrons through CuSO_(4) and Hg_(2)(NO_(3))_(2) solutions in series using inert electrodes