List-I	List-II
(A) Amino acids linked in a specific sequence.	(I) Primary structure of proteins.
(B) Regular folding of a specific sequence of amino acids due to H-bonding.	(II) Secondary structure of proteins.
(C) Fibrous proteins.	(III) Quaternary structure of proteins.
(D) Spatial arrangement of two or more polypeptide chains.	(IV) Tertiary structure of proteins.

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Choose the correct sequence for the increasing boiling point of the following compounds.
(A) Pentan-1-ol
(B) Butan-2-ol
(C) Ethanol
(D) Propan-1-ol
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Which of the following will be having maximum magnetic moment?
\(( Fe =26, Mn =25, Co =27)\)

The substance having the same value of van't Hoff factor as that of \(K_4[Fe(CN)_6]\) is :

In the following reaction, identify the product D:
\(C _6 H _5 OH + Zn~ \text{dust} \rightarrow A\)
\(CH _3 Cl + {\text { anhy. } AlCl _3} \rightarrow B\)
\({K_2 Cr _2 O _7+ H _2 SO _4} \rightarrow C\)
\({ H _2 SO _4+ HNO _3} \rightarrow D\)

Arrange the following in increasing order of their molarity when their equal weights are dissolved in 250 mL of water.
(A) glucose \(\left(180 g mol ^{-1}\right)\)
(B) sodium carbonate (106 g mol-1)
(C) sodium hydroxide \(\left(40 g mol ^{-1}\right)\)
(D) acetic acid \(\left(60 g mol ^{-1}\right)\)
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Answer the question on the basis of passage given below :
Nitrogen differs from rest of the members of group 15 due to its small size, high electronegativity, high ionization enthalpy and non-availability of d orbitals. Nitrogen has unique ability to form pa - pa multiple bonds with itself and with other elements having small size and high electronegativity. Heavier elements of this group do not form pa - pr bonds as their atomic orbitals are so large and diffuse that they cannot have effective overlapping.
Planar structures with \(N - N\) single bond are shown by
A. \(N _2 O _3\)
B. \(N _2 O _4\)
C. \(N _2 O _5\)
D. \(N _2 O\)
E. \(NO\)
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The kinetic energy of an electron in the 2nd excited state in a hydrogen atom, if its ground state energy is \(-13.6 \text{ eV}\), will be:

Nitrogen in trimethylamine is \No Solution(\mathrm{sp}^3\) hybridized. The C-N-C bond angle is \(108^{\circ}\). The geometry of trimethylamine is

\(\int_0^2 \frac{\sqrt{x}}{\sqrt{x}+\sqrt{2-x}} d x\) is equal to:

Development of fruits without fertilization is known as -

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Adsorption is the phenomenon of attracting and retaining the molecules of a substance on the surface of a solid resulting into a higher concentration on the surface than in the bulk. The substance adsorbed is known as adsorbate and the substance on which adsorption takes place is called adsorbent. In physisorption adsorbate is held to the adsorbent by weak van der Waals forces and in chemisorption by strong chemical bond.
Out of Milk, butter, ice cream, fruit juice and lemonade. Identify the one which is not a colloid.

Read the given passage and answer the following questions:
Secondary treatment or biological treatment: The primary effluent is passed into large tanks where air is pumped into it. This allows vigorous growth of aerobic microbes. While growing, these microbes consume the major part of the organic matter in the effluent. This significantly change the BOD (biochemical oxygen demand) of the effluent. The effluent in then passed into a tank a small part of the sludge is pumped back into the aeration tank to serve as the inoculum. The remaining major part of the sludge is pumped into large tanks called sludge digesters. Here, other kinds of bacteria grow anaerobically in the sludge. The biogas produced can be used source of energy as it is inflammable. The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and streams.
The biogas is a mixture of the following gases