Two maintain the alminium vessels for long life which of the following precautions must be taken?

While mixing H_2 SO_4 with water which of the following precautions should be taken?

In the given experiment, this precaution must be taken

In the about given experiment, this precaution must be taken

Which of the following is not a precaution for using intelligence test?

You are working as a volunteer in an AIDS awareness programme. If a person comes to you and asks the following questions, how will you answer? What are the precautions to be taken to prevent AIDS?

The two ends of a long cylinder containing gas are maintained at different temperatures. Which of the following quantites will have the same value throughout the cylinder?

The advertisement of life insurance must not have which of the following terms?