TN TET · Mathematics and Science (Paper II)
Chemistry topics for classes 6-8.
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Q1 · Chemistry · EASY
A student wants to separate salt from a mixture of salt and sand. Which method should be used?
Q2 · Chemistry · EASY
Blue litmus paper is dipped into a solution. The litmus paper turns red. What can be concluded about the solution?
Q3 · Chemistry · MEDIUM
Which of the following represents a chemical change?
Q4 · Chemistry · MEDIUM
A student prepared a mixture by adding 10 grams of salt to 100 grams of water. After stirring, all the salt dissolved. What is the concentration of the salt solution in percentage by mass?
Q5 · Chemistry · HARD
In the periodic table, elements in the same group have similar chemical properties because they have: