List of top Questions asked in Jharkhand Polytechnic

Sodium salt of acid present in vinegar is an example of :
What does calcium oxide produce when it reacts vigorously with water?
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) The temperature of the solution increases.
(ii) The temperature of the solution decreases.
(iii) The temperature of the solution remains the same.
(iv) Salt formation takes place.
Which of the following is formed after a few days of whitewashing and gives a shiny finish to the wall?
Endothermic reactions are those in which :
During electrolysis of water, identify the correct combination.
When a copper vessel is exposed to moist air for long, it acquires a dull green coating. The green material is a mixture of:
A white coloured compound 'X' heated strongly to form white powder of 'PbO' along with two gases 'Y' : brown in colour, 'Z' : colorless. Identify 'X', 'Y', 'Z'.
The balancing of chemical equations is in accordance with :
Which statements is/are correct?
Statement-I : Soap does not form foam easily with hard water.
Statement-II : Hard soaps are sodium or potassium salt of sulphonic acids.
Statement-III : Deuterium oxide (\(\text{D}_2\text{O}\)) is called as hard water.
Which is one of the products of chlorination of methane in the presence of sunlight?
Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?
The odour of acetic acid resembles that of :
Choose incorrect combination :
100 percent pure ethanol is called :
Which of the following does not belong to the same homologous series?
Which of the following is not a functional isomer pair (of each other)?
Find out incorrect statement among the following :
Addition reactions are undergone by :
The structure of water (\(\text{H}_2\text{O}\)) molecule is resembling with :
Rain is called acid rain when its :
Covalent bonded compounds have low melting and boiling point because of :
Ethane and ethene can be distinguished by using :
Which of the following option correctly matches the hydrocarbon type with its bond structure?
Which of the following statement is true about resistance?