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(d) All the above
(d) White powder
(b) red for live wire and black for neutral wire.
(b) the iris makes the pupil contract.
(a) chlorofluorocarbon compounds.
(b) Lead battery manufacturing factory
(d) all the above.
(a) Acetic acid.
(c) decomposition reaction.
(d) material of conductor and temperature.
The flowers that act as indicators are
(d) All the above
(d) All the above
See lessSilvery magnesium ribbon on burning changes to
(d) White powder
(d) White powder
See lessIn domestic electric circuits the colour of insulation covers of wires in the supply line is generally
(b) red for live wire and black for neutral wire.
(b) red for live wire and black for neutral wire.
See lessWhen the light is very bright
(b) the iris makes the pupil contract.
(b) the iris makes the pupil contract.
See lessDepletion of ozone is mainly due to
(a) chlorofluorocarbon compounds.
(a) chlorofluorocarbon compounds.
See lessThe pH of water sample collected from a river was found to be acidic in the range of 3.5-4,5. On the banks of river ware several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?
(b) Lead battery manufacturing factory
(b) Lead battery manufacturing factory
See lessThe properties related to metals are :
(d) all the above.
(d) all the above.
See lessWhich of the following is a weak acid ?
(a) Acetic acid.
(a) Acetic acid.
See lessHeating of ferrous sulphate to produce ferric oxide and the oxides of sulphur is an example of
(c) decomposition reaction.
(c) decomposition reaction.
See lessResistivity of a given conductor depends on
(d) material of conductor and temperature.
(d) material of conductor and temperature.
See less