The correct order of decreasing \(pK _{ a }\) values of the following compounds

Which of the following pair of compounds exhibits the same color in aqueous solution?

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.
The substances which behave as normal electrolyte at low concentration but become colloids at higher concentration, are known as :

Arrange the following compounds in increasing order of their acidity:
(A) Phenol
(B) Ethanol
(C) Benzoic acid
(D) p-Nitrobenzoic acid
Choose the correct answer from the options given below:

The correct sequence of steps during the corrosion of iron is
(A) Ferrous ions are oxidized by atmospheric oxygen
(B) Hydrated ferric oxide (Fe2O3 2H2O) formed with production of H+ ions
(C) At a particular spot of iron object, oxidation takes place and that spot behaves as anode
(D) Electron released at anode moves through metal and reduces oxygen in the presence of H+
Choose the correct answer from the options given below:

For a chemical reaction with a rise in temperature by \(10^{\circ} C\), the rate constant becomes nearly

In Kolbe's reaction, phenol undergoes :

Arrange the following electrodes in increasing order of strength as an oxidizing agent.
(A) \(Ni ^{2+}+2 e^{-} \rightarrow Ni (s) \quad E^0=-0.25 V\)
(B) \(Cu ^{2+}+2 e^{-} \rightarrow Cu (s) \quad E^0=0.34 V\)
(C) \(Br _2+2 e^{-} \rightarrow 2 Br ^{-} \quad E^0=1.09 V\)
(D) \(O _2(g)+2 H ^{+}+2 e^{-} \rightarrow H _2 O _2 \quad E^0=0.68 V\)
Choose the correct answer from the options given below :

Which of the following in NOT true for Bt toxin ?
(A) It is produced by Bacillus thuringiensis
(B) It is produced in active form
(C) It exist as inactive protoxin
(D) It is used to produce nematode-resistant plants
Choose the correct answer from the options given below :

Assume \(A, B\) and \(C\) are matrices of order \(m \times n, n \times 3\) and \(3 \times q\) respectively. The restrictions on \(m, n\) and \(q\) so that \(A B+B C\) is defined are

The number of moles of electrons produced in the oxidation of 67.2 L of H 2 at STP is:

List-I (Biomolecule)	List-II (Function/Diseases)
(A) Vitamin A	(I) Menstrual cycle
(B) Thiamine	(II) Xerophthalmia
(C) Glucocorticoids	(III) Beri-Beri
(D) Estradiol	(IV) Addison's disease

Choose the correct match:

Read the following passage carefully and answer the given questions.
Theory of Evolution
The evolution of life is a gradual process through which simple organisms are transformed into complex life forms over billions of years. It involves genetic changes, adaptation to the environment, and the emergence of diversity in species. Fossil records provide evidence of extinct life forms and transitional stages. Evolution is influenced by factors such as mutation, genetic recombination, and environmental pressure, shaping the biodiversity we see today. Charles Darwin and Alfred Russel Wallace were pioneering naturalists who developed the theory of evolution by natural selection.
According to Darwin, the term 'Fitness' in the context of natural selection refers to: