Why is the reduction of a metal oxide easier if metal formed is in liquid state at the temperature of reduction ?
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An oxide of an element was dissolved in water. The final solution turned red litmus blue. Is the element metal, non-metal or a metalloid?
The oxide of the element is basic as it turns red litmus blue .This means that the element is a metal (M).
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How would you rewrite Euclid’s fifth postulate so that it would be easier to understand?
When two lines are cut by a third line, such that the sum of interior angles is less than 180° on one side then the first two lines intersect on...
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You spill a bucket of soapy water on a marble floor accidentally. Would it make it easier or more difficult for you to walk on the floor? Why?
It would make it more difficult for us to walk on a soapy floor because layer of soap makes floor smooth. The coating of soapy water reduces the friction and...
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Why is the highest oxidation state of a metal exhibited in its oxide or fluoride only ?
Oxygen and fluoride have small size and high electronegativity. They can oxidise the metal.
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Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310K
Metal: Mercury (Hg); Non-metal: Bromine (Br) Two metals with melting points less than 310K are Cesium (Cs) and Gallium (Ga).
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There are 3 unknown metals-A, B and C. C displaces B from its oxide while with oxide of A
C displaces B from its oxide, therefore, C is more reactive than B. There is no reaction when C is treated with oxide of A or C does not displace A...
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Ammonia on catalytic oxidation gives an oxide from which nitric acid is obtained. The oxide is : (a) N2O3
(c) [Fe(H2O)5NO]2+ ion is formed
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When a hot liquid is mixed with a cold liquid, the temperature of the mixture
(d) is undefined for some time and then becomes nearly constant.
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A solid is completely immersed in a liquid. The force exerted by the liquid on the solid will (a) increase if it is pushed deeper inside the liquid
(c) decrease if it is taken partially out of the liquid (d) be in the vertically upward direction. EXPLANATION: The force exerted by the liquid on the solid is equal to the volume...
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See, how they are taking the huge pillar up along the slope? Is it easier to lift a heavy thing straight up or along a slope.
It is easier to lift a heavy thing along a slope.
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