Related Questions

Electrostatic separation of minerals from each other is based on their differences in the following property.
A Densities
B Magnetic permeabilities
C Electrical conductivities
D Hardness
The most effective farming method for returning minerals to the soil is
A Contour ploughing
B Terracing
C Crop rotation
D Furrowing
While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit?
A E.M.F.
B Current
C Current density
D Conductivity
A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be
A M
B $$\frac{{\text{M}}}{2}$$
C 2 M
D $$\frac{{\text{M}}}{4}$$
How does the magnetic compass needle behave in a magnetic field?
A It assures a position right angle to magnetic field
B It starts rotating
C It assures a position which follows a line of magnetic flux
D None of the above
If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity
A less than that of disc but in opposite direction
B equal to that of disc and in the same direction
C equal to that of disc and in the opposite direction
D less than that of disc and in the same direction
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
A Cresylic acid
B Xanthaies
C Pine oil
D All of the above
The forms in which various metals and non metals occur in nature are called minerals. Which of the following is not a metallic ferrous mineral?
A Cassiterite
B Sphalerite
C Chalcopyrite
D Calcite
Which of the following minerals is not found in the plateau regions?
A Coal
B Iron ore
C Mineral oil \
D Manganese \
Which one of the following minerals is not found in Uttar Pradesh?
A Limestone
B Mica
C Bauxite
D Gypsum

Next steps