`5` liters of aqueous solution is kept in presence of `O_(2)` and suitable microorganisms at `20°C`. If `O_(2)` consumed is `0.2g`.The B.O.D is - - - - -ppm

An aqueous solution of H_(2)O_(2)

o-oxylene when oxidised in presence of V_(2)O_(5) the product is :

NO reacts with O_(2) to form NO_(2) . When 10 g of NO_(2) is formed during the reaction, the mass of O_(2) consumed is

20 volume H_(2)O_(2) solution has a strength of about

The mole fraction of water in 20% (wt.//wt.) aqueous solution of H_(2)O_(2) is:

A bottle of an aqueous H_(2)O_(2) solution is labelled as '28V' H_(2)O_(2) and the density of the solution ("in" g//mL) is 1.25. Choose the correct option.

Objective question . i. A certains compound has the molecular formula X_(4) O_(6) . If 10 g of X_(4) O_(6) has 5.72 g X , then atomic mass of X is: a. 32 amu b. 42 amu c. 98 amu d. 37 amu ii. For 109% labelled oleum, if the number of moles of H_(2)SO_(4) and free SO_(3) be p and q , respectively, then what will be the value of (p - q)/(p + q) a. 1//9 b. 9 c. 18 d. 1//3 iii. Hydrogen peroxide in aqueous solution decomposes on warming to give oxygen according to the equation, 2H_(2) O_(2) (aq) rarr 2 H_(2) O (l) + O_(2) (g) Under conditions where 1 mol gas occupies 24 dm^(3), 100 cm^(3) of X M solution of H_(2) O_(2) produces 3 dm^(3) of O_(2) . Thus, X is a. 2.5 b. 0.5 c. 0.25 d. 1 iv. 4 g of sulphur is burnt to form SO_(2) which is oxidised by Cl_(2) water. The solution is then treated with BaCl_(2) solution. The amount of BaSO_(4) precipitated is: a. 0.24 mol b. 0.5 mol c. 1 mol d. 0.125 mol v. A reaction occurs between 3 moles of H_(2) and 1.5 moles of O_(2) to give some amount of H_(2) O . The limiting reagent in this reaction is a. H_(2) and O_(2) both b. O_(2) c. H_(2) d. Neither of them vi. 4 I^(ɵ) + Hg^(2+) rarr HgO_(4)^(-) , 1 mole each of Hg^(2+) and I^(ɵ) will form: a. 1 mol of HgI_(4)^(2-) b. 0.5 mol of HgI_(4)^(-2) 0.25 mol of HgI_(4)^(2-) 2 mol of HgI_(4)^(-2)

The total number of electrons in 2.0 g of D_(2)O to that in 1.8 g of H_(2)O

When propyne is treated with aqueous (underset(2)(H)Sunderset(4)(O)) in presence of (HgS(4)(O)) , the major product is

20 mg of K^(o+) ions are present in 1 L of aqueous solution. Density of the solution is 0.8 mL^(-1) . What is the concentration of K^(o+) ions in ppm?