Arrange the following electrodes in decreasing order of the strength of the respective ions as reducing agent.
(A) \(Cu ^{2+}+2 e^{-} \rightarrow Cu (s) \quad E^{\circ}=0.34 V\)
(B) \(Sn ^{2+}+2 e^{-} \rightarrow \operatorname{Sn}(s) \quad E^{\circ}=-0.14 V\)
(C) \(AgBr ( s )+e^{-} \rightarrow Ag ( s )+ Br ^{-} \quad E^{\circ}=0.10 V\)
(D) \(Pb ^{2+}+2 e^{-} \rightarrow Pb (s) \quad E^{\circ}=-0.13 V\)
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Which of the following compounds can be prepared by Sandmeyer's reaction?
(A) Chlorobenzene
(B) Bromobenzene
(C) Cyanobenzene
(D) Fluorobenzene
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Biomolecules are the organic compounds present as an essential constituents of living organisms in different cells. molecules are generally termed as macromolecules, which are carbohydrates, enzymes, nucleic acids, amino acids and proteins The etc. Carbohydrates are classified as sugars and non-sugars include sucrose, glucose, fructose, starch and cellulose. Enzymes are coordinated with various chemical reactions in nucleic acid. Nucleic acids are found in living organisms made up of proteins and atural polymers. Two types that are generally found in biological systems are DNA and RNA nucleic acid. Amino acids bifunctional groups of carboxyl and amino groups. Proteins are a class of biologically important compounds. They are crucial are to virtually all processes in living systems. Some of them are hormones, which serve as chemical messengers that coordinate certain biochemical activities.
Starch is a polymer of saccharides known as

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Amines are classified as primary \(\left(1^{\circ}\right)\), secondary \(\left(2^{\circ}\right)\) and tertiary \(\left(3^{\circ}\right)\) depending upon the number of hydrogen atoms replaced by alkyl or aryl groups in ammonia molecules. Aliphatic amines are a stronger bases due to \(+I\) effect of an alkyl groups. Intermolecular hydrogen bonding in primary and secondary amines affects the boiling points of amines. The intermolecular association is more in primary amines than in secondary amines as there are more number of hydrogen atoms available for hydrogen bond formation. Nitro compounds are reduced to amines by passing hydrogen gas in the presence of finely divided nickel, palladium or platinum and also by reduction with metals in an acidic medium. Gabriel synthesis is used for the preparation of primary amines. Primary amines react with nitrous acid to give unstable diazonium-salts which can be used to synthesize a variety of compounds.
The compound having the highest boiling point is:

Which one of the following statements is correct for a first order reaction?

Match the lanthanoid property given in List-I with lanthanoid ion given in List-II

LIST – I (Lanthanoid property)	LIST – II (lon)
(A) Strong oxidant	(I) \(Lu ^{3+}\)
(B) Strong reducing agent	(II) \(La ^{3+}\)
(C) \([ Xe ] f^{14}\) configuration	(III) \(Ce ^{4+}\)
(D) largest ionic radii	(IV) \(Eu ^{2+}\)

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Arrange the following electrodes in decreasing order of the strength of the respective ions as reducing agent.
(A) \(Cu ^{2+}+2 e^{-} \rightarrow Cu ( s ) \quad E^{\circ}=0.34 V\)
(B) \(Sn ^{2+}+2 e^{-} \rightarrow Sn (s) \quad E^{\circ}=-0.14 V\)
(C) \(AgBr (s)+e^{-} \rightarrow Ag (s)+ Br ^{-} \quad E^{\circ}=0.10 V\)
(D) \(Pb ^{2+}+2 e^{-} \rightarrow Pb (s) \quad E^{\circ}=-0.13 V\)
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Which of the following is used as 'clot buster'?

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Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. For determining the cause of allergy, the patient is exposed to or injected with very small doses of possible allergens, and the reactions studied. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Heroin, commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine. 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. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal.
Which of the following drugs are commonly used to quickly reduce the symptoms of allergy?

The constancy of the binding energy per nucleons in the range \( 30 < A < 170 \), where A is the mass number shows that :

Let \(A=\left[a_{i j}\right]_{2 \times 3}\) and \(B=\left[b_{i j}\right]_{3 \times 2}\), then \(|5 A B|\) is equal to:

Two identical photo cathode receive the light of frequencies \(f_1\) and \(f_2\) respectively. The velocities of photoelectrons coming out are \(V_1\) and \(V_2\) respectively. The value of \((V_1^2 - V_2^2)\) will be:

Arrange the given organisms in the food chain starting from lower to higher trophic level?
(A) Lion
(B) Cow
(C) Grass
(D) Wolf
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