Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
A student heated some sulphur in a spatula and collected the gas ‘X’.
Which one among the following is correct about ‘X’ ?
X is SO, and it turns moist litmus to blue
X is SO,, and it turns moist litmus to red
X is SO, and it turns moist litmus to red
X is SO , and it turns dry litmus to blue
Human stomach produces acid 'X' which helps in digestion of food. Acid 'X' is?
Acetic acid
Methanoic acid
Hydrochloric acid
Citric acid
When concentrated H2SO4 spills on a surface , it should be immediately cleaned
With a piece of cloth
by adding cold water
by adding solid Na2CO3
by adding solid BaCl2
A bee-sting leaves an acid that causes pain and irritation. The injected acid is
Sulphuric acid
When iron nails are added to an aqueous solution of copper sulphate, a chemical change occurs, which of the following is not true about this reaction ?
Blue colour of the solution fades
Iron nails become brownish in colour
It is a displacement reaction
Iron nails dissolve completely
