Question Text
Question 1 :
Click and choose the correct answer.<br>Which of the following generally cannot exist independently?
Question 2 :
Click and choose the correct option.<br>Different substances have different ignition temperatures.
Question 7 :
Click and choose the correct answer.<br>Which of the following is a permanent and irreversible change?
Question 8 :
Click and choose the correct answer.<br>Which of the following is not a physical change?
Question 9 :
Click and choose the correct option.<br>Which of the following is an example of monoatomic ion?
Question 10 :
Click and choose the correct option.<br>Which of the following is used as a protective shielding for harmful radiation?
Question 11 :
Click and choose the correct option.<br>Which of the following is not polyatomic ion?
Question 12 :
Click and choose the correct answer.<br>Which of the following is present in rust?
Question 14 :
Click and choose the correct option.<br>Which of these is commonly called washing soda?
Question 16 :
Click and choose the correct answer.<br>The evolution of gases is represented by a down arrow.
Question 18 :
Click and choose the correct answer.<br>Which gas is produced when copper(II) carbonate is heated?
Question 19 :
Click and choose the correct answer.<br>Which is the main constituent of proteins?
Question 20 :
Click and choose the correct option.<br>New substances that are produced in a chemical reation are called products.
Question 22 :
Click and choose the correct answer.<br>Which of the following is an example of a physical change?
Question 24 :
Click and choose the correct answer.<br>Which of the following is an example of an alloy?
Question 25 :
Click and choose the correct answer.<br>Which of the following solids sublime on heating?