2.4g of pure Mg (at.mass 24) is dropped in 100 ml of 1 N HCl. What is true? (a) 1.122 L of hydrogen is produced at S.T.P
(b) 0.01 mol of magnesium is behind.
(c) 0.1 mol of `Mg^(2+)` ions are formed in solution.
(d) HCl is the limiting reagent

2.4 g of pure Mg (at. Mass = 24) is dropped in 100 mL of 1 M HCl . Which of the following statement is wrong ?

40 ml of 0.1 M ammonia is mixed with 20 ml of 0.1 M HCl . What is the pH of the mixture ? ( pK_(b) of ammonia solution is 4.74. )

100 ml of 0.1 N NaOH is mixed with 50 ml of 0.1 N H_2SO_4 . The pH of the resulting solution is

What amount of heat will be released when(a) 0.1 mol of hydrochloric acid is neutralised by 0.1 mol of caustic soda solution (b) 0.2 mol of nitric acid is mixed with 0.2 mol of caustic soda solution?

Ksp of Mg(OH)_2 is 4.0×10 ^(−12) . The number of moles of Mg^ (2+) ions in one litre of its saturated solution in 0.1 M NaOH is

To dissolve 0.9 g metal, 100 mL of 1 N HCl is used. What is the equivalent weight of metal?

5.3 g of M_(2)CO_(3) is dissolved in 150 mL of 1 N HCl . Unused acid required 100 mL of 0.5 NaOH. What will be the equivalent mass of M?

K_(sp) of Mg(OH)_2 is 4.0 xx 10^(-12) . The number of moles of Mg^(2+) ions in one litre of its saturated solution in 0.1 M NaOH is

The gastric juice in our stomach contains enough HCl to make the hydrogen ion concentration about 0.01 mol L^(-1) . The pH of gastric juice is

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)