PART - 1 CH - 2 Acids, Bases and Salts — Science STD 10 — Question

Main energy source in an ecosystem is _________. (Sun, Wind, Water)

Magnetic force acting on a current-carrying wire kept in a magnetic field is in………direction to the magnetic field. (parallel, normal, perpendicular)

Molecular formula of gypsum is _________ .(CaSO₄·2H₂O, CaCO₃, NaCl)

When iron nail is dipped in a solution of copper sulphate, then, the colour of the solution becomes _________ after sometime.(Pale green, Blue, Red)

A ............. lens is thicker at its edges than at its centre. (convex, concave, plane)

With the help of a…...the presence of electric current can be known. (potentiometer, galvanometer, voltmeter)

By a enlarged image of an object can be obtained. (convex, plane, concave)

Micelles forms an __________ in water. (Emulsion, Precipitate, Suspension)

Lithium, sodium and ......... are the members of Dobereiner’s triad. (Nitrogen, Vanedium, potassium)

_______ SI unit of magnetic field. (coulomb, ampere, Tesla)