Which one of the following is the cathodic reaction in a fuel cell?

Helium and element ' \(X\) ' have outer electron configuration of ns2. Identify the element ' \(X\) '.

Which of the following base is NOT present in DNA?

Which of the following reactions are given by Phenols?
(A) Nitration
(B) Halogenation
(C) Oxidation
(D) Acetylation
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Identify the major product in the following reaction :
\(CH_3-CH\left(CH_3\right)-CH_2 Br \xrightarrow{\text { aq. } OH^{-}} \text {? }\)

Match List - I with List - II

List - I (Name)	List - II (Use)
(A) Carbon tetrachloride	(I) Pesticide
(B) DDT	(II) Solvent
(C) lodoform	(III) Refrigerant
(D) Freons-12	(IV) Antiseptic

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Answer the question on the basis of passage given below:
Proteins are the polymers of about twenty different a-amino acids which are linked by peptide bonds. Proteins perform various structural and dynamic functions in the organisms. Proteins which contain only a-amino acids are called simple proteins. The secondary or tertiary structure of proteins get disturbed on change of pH or temperature and they are not able to perform their functions. This is called denaturation of proteins. Enzymes are biocatalysts which speed up the reactions in biosystems. Vitamins are accessory food factors required in the diet. They are classified as fat soluble (A, D, E and K) and water soluble (B group and C). Deficiency of vitamins leads to many diseases. Nucleic acids are the polymers of nucleotides which in turn consist of a base, a pentose sugar and phosphate moiety.Nucleic acids are responsible for the transfer of characters from parents to offsprings. There are two types of nucleic acids DNA and RNA. DNA contains a five carbon sugar molecule called 2-deoxyribose whereas RNA contains ribose.
During denaturation of proteins:

The work function of cesium is 2.27 eV. The cut off voltage which stops the emission of electron from cesium when irradiated with light of wavelength 400 nm is

If \(A\) is a square matrix of order \(3 \times 3\) and \(|A|=4\). The value of \(\mid(\operatorname{adj} A)\). \(A \mid\) is:

Angle between the line \(\frac{x-1}{3}=\frac{y+1}{5}=\frac{z-2}{4}\) and the plane \(2 x+2 y-z=3\) is:

Match List-l with List-ll

List-l (Name of the gene)	List-II (Encodes)
(A) 'i'	(I) Permease
(B) 'z'	(II) Repressor
(C) 'y'	(III) Transacetylase
(D) 'a'	(IV) β- Galactosidase

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A current element \(\Delta \vec{l}=\Delta x \hat{i}\) (where \(\Delta x=1 cm\) ) is placed at the origin and carries a current 10 A . The magnetic field on y -axis at a distance of 0.5 m is :

Anush takes a loan of ₹ \( 150000\) @ \(16 \%\) annual interest for 5 years. His EMI (Equally Monthly Installmant) on monthly basis under flat rate system is :