The mathematical expression of PH is
The mathematical expression of PH is A. log 10[OH–] B. log 101/[H 3 O+] C. log 10[H 3…
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The major and most effective way of controlling pollution is to
The major and most effective way of controlling pollution is to A. improve machinery so that the substances…
The colour of litmus in a neutral medium is
The colour of litmus in a neutral medium is A. purple B. pink C. yellow D. orange Correct…
16.55g of lead (ll) trioxonitrate (V) was dissolved in 100g of distilled water at 20oC,…
16.55g of lead (ll) trioxonitrate (V) was dissolved in 100g of distilled water at 20oC, calculate the solubility…
Water is said to be temporarily hard when it contains
Water is said to be temporarily hard when it contains A. Ca (HCO3)2 and Mg (HCO3)2 salts B.…
On exposure to the atmosphere, a hydrated salt loses its water of crystallization to become…
On exposure to the atmosphere, a hydrated salt loses its water of crystallization to become anhydrous. This phenomenon…
The radio active radiation used in studying the arrangement of particles in giant organic molecules…
The radio active radiation used in studying the arrangement of particles in giant organic molecules is A. (gamma)-…
A silicon -containing ore has 92% 28Si, 5% 29Si and 3% 30Si. Calculate the relative…
A silicon -containing ore has 92% 28Si, 5% 29Si and 3% 30Si. Calculate the relative atomic mass of…
If the difference in electronegativity of elements P and Q is 3.0. The bond that…
If the difference in electronegativity of elements P and Q is 3.0. The bond that will be formed…
How many protons, neutrons and electrons respectively are present in the element 60/27 Co?
How many protons, neutrons and electrons respectively are present in the element 60/27 Co? A. 27, 33 and…