When alkali metal dissolves in liquid ammonia, the solution gives deep blue colour which is conducting in nature .Why?
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Which of the following pairs will give displacement reactions? (a) NaCl solution and copper metal (b) MgCl2 solution and aluminium metal
(d) AgNO3 solution and copper metal
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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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A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains
(d) starch,is the correct option.
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One die of red colour, one of white colour and one of blue colour are placed in a bag.
A die has six faces that are numbered from 1 to 6, with one number on each face. Let us denote the red, white, and blue dices as R, W,...
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When an alkali metal dissolves in liquid ammonia the solution can acquire different colours
All alkali metal dissolve in liquid ammonia giving deep blue solutions which are conducting in nature. These solutions contain ammoniated cations and ammoniated electrons as shown below: M + ( x...
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Why is the reduction of a metal oxide easier if metal formed is in liquid state at the temperature of reduction ?
[Hint : Entropy is more positive when the metal is in liquid state as compared with solid state, so AG becomes more ve.]
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A test tube contains a brown coloured liquid. The colour of the liquid in test tube remains
The element present in the liquid is bromine
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Three identical towels of red, blue and green colour are hanging on a clothes line in the sun. What would be the colour of shadows of these towels?
The colour of shadows of all three towels will be the same.
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One die of red colour, one of white colour and one of blue colour are placed in a bag
A die has six faces that are numbered from 1 to 6, with one number on each face. Let us denote the red, white, and blue dices as R, W,...
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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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