The lower meniscus should be taken into consideration while reading the level of mercury in a burette.

The following 'precautions' were listed by a student in the experiment on study of 'Dependence of current on potential difference'. (A) Use copper wires as thin as possible for making connections. (B) All the connections should be kept tight. (C) The positive and negative terminals of the voltmeter and the ammeter should be correctly connected. (D) The 'zero error' in the ammeter and the voltmeter should be noted and taken into consideration while recording the measurements. (E) The 'key' in the circuit, once plugged in, should not be taken out till all the observations have been completed. The 'precautions' that need to be corrected and revised are :

A : H_3O^+ ion from water is also taken in consideration while calculating the pH of very dilute solution (say concentration = 10^(-9) M ) of acid R: [H_3O^+] from water is only available in very dilute solution of acid.

Which of the following character is not taken into consideration while preparing a karyotype

The lower end of a capillary tube is immersed in mercury. The level of mercury in the tube is found to be 2 cm below the outer level. If the same tube is immersed in water, up to what height will the water rise in the capillary ?

What should be the minimum number of traits taken into consideration to prove Mendel's law of independent assortment

a) State two main considerations taken into account while choosing the objective of astronomical telescope. b) Draw a ray diagram of reflecting type telescope. State its magnifying power. c) State the advantages of reflecting type telescope over the refracting type?