26.CSIR-Central Scientific Instruments Organisation developed PIVA, is an instrument to measure which value?

[A] Phosphorous
[B] Iodine
[C] Ammonium
[D] None of the above

2.Which of the following is used in pencils?

Which of the following statements is not true of scientific experiments?

a. They must occur under carefully controlled conditions found in a laboratory.
b. They yield useful results regardless of whether the hypothesis is supported or rejected.
c. They must be well documented.