You have given coffee powder, crystals of Potassium permanganate, copper sulphate, petridish, water etc. Using this materials which experiment you can conduct in the lab ?
A) Permeability
B) Osmosis
C) Diffusion
D) Filtration
1 Answers
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0.98 g of the metal sulphate was dissolved in water and excess of barium chloride was added. The precipitated barium sulphate weighted 0.95 g. Calcula
Correct Answer - 72.61
2 Answers 5 views
In a survey of 200 ladies , it was found that 142 like coffee , while 58 dislike it . Find the probility that a lady chosen at random (i) likes coffee
Correct Answer - (i) 0.71 (ii) 0.29
2 Answers 1 views
The water of crystallisation of hydrous copper sulphate is
Correct option is B) 5
2 Answers 1 views
Coffee powder and KMNO4 experiments are done to prove
Correct option is D) Diffusion
2 Answers 1 views
Take two test tubes with some water. Add salt powder to one test tube and add crystals of salt to the second one. Observe.
B) size of the solute
2 Answers 1 views
On adding a piece of aluminium foil to blue coloured copper sulphate solution, copper will be deposited on aluminium foil. Then the solution
B) Becomes colourless
2 Answers 1 views
The iron nail dipped in Copper Sulphate solution becomes brown and the blue colour of the Copper Sulphate solution fades.
D) Displacement
2 Answers 1 views
Salt, oil, turmeric powder, sugar, honey etc are …………………
Natural preservatives
2 Answers 1 views
Iron powder and powder of rust are taken in two containers X and Y respectively. Dilute sulphuric acid is added two containers
Correct Answer - B Iron is an element and rust is a compound of iron in which iron does not retain its properties and hence rust does not liberate hydrogen gas...
2 Answers 1 views
Statement-1 . Sodium reacts with oxygen to form `Na_(2)O_(2)` but potassium reacts with oxygen to form `KO_(2)`. Statement-2 . Potassium is more react
Correct Answer - b Correct explanation . Due to bigger size of `K^(+)` than `Na^(+)`, it has a weak positive field around it which cannot prevent peroxide ion `(O_(2)^(2-))` to combine...
2 Answers 1 views