In the process of extraction, gold combines with cyanide in the presence of oxygen and water to make a complex.
The formula of the complex is

\(30\text{ mL}\) of \(\text{NiSO}_4\) is electrolysed using a current of \(360\text{mA}\) for \(30\text{ minutes}\).
How much of the metal would have been plated out if the current efficiency is only \(60\%\)? (\(\text{Ni} = 58.7\text{g/mol}\))

Question based on following passage:
Adsorption is the process of attracting and retaining the adsorbate molecules on the surface of adsorbent. It is of two types i.e. Physisrption and chemisorption. To increase the rate of reaction, the substance called 'catalyst' is added. Promotors enhance the activity of catalyst while poison decrease the catalyst activity. Solutions may be true solution, suspension and colloids. Colloids are heterogenous but quite stable. On the basis of nature of interaction, colloids may be Lyophilic or Lyophobic. On the basis of type of dispersed phase particles, there may be multimolecular colloids, macromlecular colloids and associated colloids. The congulation of colloids may be done by boiling, dialysis or by mixing oppositely charged sols.
Molybdenum used in Haber process, acts as a :

Choose the correct statement about molar conductivity, \(\Lambda_m\)

Which of the following is incorrect?

White phosphorous shows chemiluminescence because it:

The oxidation number of Co in the complex \(\left[ Co \left( H _2 NCH _2 CH _2 NH _2\right)_3\right]_2\left( SO _4\right)_3\) is:

Which of the following statements is incorrect?

\(\int_0^8\left(x^{\frac{2}{3}}+1\right) d x\) is equal to

Sporopollenin, the most resistant organic material is present in:

Read the following passage carefully and answer the given questions.
Immune System in the Body
The human immune system consists of lymphoid organs, tissues, cells and soluble molecules like antibodies. The primary lymphoid organs are bone marrow and thymus where immature lymphocytes differentiate into antigen-sensitive lymphocytes. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils, Peyer's patches of small intestine and appendix. The secondary lymphoid organs provide the sites for interaction of lymphocytes with the antigen, which then proliferate to become effector cells. The bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Hence, an antibody is represented as H2L2. Different types of antibodies are produced in our body. IgA, IgM, IgE, IgG are some of them. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs.
The site of interaction of lymphocytes with antigen is

The values of van't Hoff factors for \(\text{CaCl}_2\), \(\text{Na}_2\text{SO}_4\) and \(\text{KCl}\) respectively are:

The reaction in which an amide is treated with bromine in presence of ethanolic solution of sodium hydroxide is called