Name the three liquids which when tested in the manner shown in the given figure, may cause the magnetic needle to deflect

When the free ends of the tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason ?

Two thick wires and two thin wires, all of same material and same length from a square in three different ways P,Q and R as shown in the figure. With correct connections shown, the magnetic field due to the current flow at the centre of the loop will be zero in case of

Three similar bar magnets are placed to form an equilateral triangle as shown in the figure . The magnetic moment of each magnet is M . What is the magnetic moment of the system ?

Name three ways by which natural resources may last longer.

A metal is treated with dilute sulphuric acid. The gas evolved is collected by the method shown in the figure: (i) Name the gas (ii) Is the gas soluble or insoluble in water? (iii) Is the gas lighter or heavier than air? (iv) How will you test the gas (v) IF the metal used above in zinc then write the chemical equation for the evolution of gas (vi) Write one industrial use of the gas evolved.

Will the compass needle show deflection when the switch in the circuit shown by the figure is closed?

Three metals of alkaline earth metal group (A,B and C ) When reacted with a fixed volume of liquid Br_(2) separately gave a product (metal bromides) whose mass is plotted against the mass of metals taken as shown in the figure. From the plot, predict what relation can be concluded between the atomic weight of A, B and C a. C gt B b. B gt A , C lt A lt B Data is insufficient to predict