EASY
RPF Constable CBT 1
IMPORTANT
Earn 100
Aqueous solution of copper sulphate reacts with aqueous ammonium hydroxide solution to give _____.
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Important Questions on Chemistry
EASY
RPF Constable CBT 1
IMPORTANT
Acetic acid was added to a solid X kept in a test tube. A colourless and odourless gas was evolved. The gas was passed through lime water which turned milky. It was concluded that _____ .
MEDIUM
RPF Constable CBT 1
IMPORTANT
In one of the industrial processes used for manufacture of sodium hydroxide, a gas X is formed as by-product. The gas X reacts with lime water to give a compound Y which is used as a bleaching agent in chemical industry.
The compound X and Y could be _____ .
MEDIUM
RPF Constable CBT 1
IMPORTANT
Which organic acid is present in the tomato?
EASY
RPF Constable CBT 1
IMPORTANT
You are having five solutions A,B,C,D and E with pH values as follows :
A =1.8, B = 7, C = 8.5, D = 8 and E = 5 solution would be most likely to liberate hydrogen with magnesium powder?
MEDIUM
RPF Constable CBT 1
IMPORTANT
The reagent used to distinguish iron(II) chloride and iron (III) chloride is _____ .
MEDIUM
RPF Constable CBT 1
IMPORTANT
An acid ( A) with sodium hydrogen carbonate is used in making the cakes fluffy and spongy. It is due to the release of (B) gas in the reaction. Here, A and B are _____.
EASY
RPF Constable CBT 1
IMPORTANT
The pH of a solution is 4.0. What should be the change in the hydrogen ion concentration of the solution, if its pH is to be increased to 5.0?
EASY
RPF Constable CBT 1
IMPORTANT
The pH of a solution is 5.0. Its hydrogen ion concentration is decreased by 100 times, the solution will be _____ .
