Chemistry questions
29404 published questions with worked solutions.
- Eq.wt. of NH_3 in, NH_3 + O_2 NO + H_2O is :
- Titre value is the volume of titrant used for a definite amount of unknown reagent at its :
- Equivalent mass of oxidizing agent in the reaction is. SO_2 + 2H_2S 3S + 2H_2O
- The number of electrons lost or gained during the change Fe + H_2O Fe_3O_4 + H_2 is
- When the ion Cr_2O_7^ 2- acts as an oxidant in acidic aqueous solution the ion Cr^ 3+ is formed. How many mole of Sn^ 2+ would be...
- For the reaction : N_2 + 3H_2 2NH_3 ; if E_1 and E_2 are equivalent masses of NH_3 and N_2 respectively, then E_1 - E_2 is :
- The oxidation number of chromium in potassium dichromate is
- In the ionic equation, BiO_3^- + 6H^+ + xe^- Bi^ 3+ + 3H_2O The values of x is
- In the reaction, VO + Fe_2O_3 FeO + V_2O_5 . The eq.wt. of V_2O_5 is equal to its :
- Equivalent mass of Na_2S_2O_3 in its reaction with I_2 is equal to :
- 1 mole of chlorine combines with a certain weight of a metal giving 111 g of its chloride. The atomic weight of the metal...
- Titrations in which I_2 solution is used as intermediate are known as ....titrations.
- A good indicator must possess the following characteristics :
- The equivalent weight of KMnO_4 (acidic medium) is (at. wt. of K = 39; Mn = 55) :
- Oxidation states of the metal in the minerals haematite and magnetite, respectively, are
- Which of the following reaction involves oxidation and reduction?
- A substance, that by its sharp colour change indicates the completion of reaction is known as :
- An element A in a compound ABD has oxidation number A^ n- . It is oxidized by Cr_2O_7^ 2- in acidic medium. In the experiment...
- The oxidation number of Cr in CrO_5 is
- Oxidation number of 'N' in N_3H (hydrazoic acid) is