Given below are four statements with reference to a catalyst. Choose the incorrect statement(s)
(A) A catalyst lowers the potential energy barrier, thus decreasing the activation energy.
(B) A catalyst lowers the Gibbs energy \((\Delta G)\) of the reaction.
(C) A small amount of catalyst converts a large amount of reactants into products.
(D) A catalyst can catalyze non-spontaneous reactions also.
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Match List I with List II

LIST I	LIST II
A. Ascorbic acid	I. Xerophthalmia
B. Vitamin D	II. Osteomalacia
C. Riboflavin	III. Bleeding of Gums
D. Vitamin A	IV. Cheilosis

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The halide which will undergo \(SN ^2\) reaction easily:

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Alcohols and phenols are formed when a hydrogen atom in a hydrocarbon, aliphatic and aromatic respectively is replaced by - OH group. These are further classified on the basis of number of hydroxy groups and according to the hybridization of the carbon atom \(sp ^2\) or \(sp ^3\) to which the -OH group is attached. They find applications in industry as well as in day-to-day life. One of the most commercially obtained alcohol also known as wood spirit is obtained by destructive distillation of wood. Both alcohols and phenols are acidic in nature. The acidity of alcohols and phenols vary according to the nature of substituent(s) attached to them. Alcohols and phenols react with carboxylic acids, acid chlorides and acid anhydrides to form esters. Introduction of acetyl group in alcohols and phenols is called acetylation. Phenol undergo electrophilic aromatic substitution reaction because the -OH activates the benzene ring. It undergoes nitration, halogenation and sulphonation reactions.
Identiify the strongest acidic compound

Match List - I with List - II.

List – I	List – II
(A) Glycosidic linkage	(I) Monomeric units of nucleic acid
(B) Peptide linkage	(II) Sugar-heterocyclic base combination
(C) Nucleotide	(III) Linkage between two amino acid units
(D) Nucleoside	(IV) Linkage between two mono saccharide units

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What is the packing efficiency of simple cubic lattice?

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All transition elements display typical metallic properties like high melting point, boiling point, tensile strength, high malleability and ductility, luster, etc. Their metallic character increases down the group and elements of \(4 d\) and 5d series exhibit higher metallic characters. They show variable oxidation states and forms a number of coloured compounds due to the presence of unpaired electrons which shows d-d transitions and makes them paramagnetic.
The two strongest oxidising agents among the oxides will be :
A. \(MoO _3\)
B. \(CrO _3\)
C. \(Mn _2 O _7\)
D. \(WO _3\)
E. \(VO _2\)
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Optically active polyhydroxy aldehydes or ketones or molecules which provide such units on hydrolysis are called carbohydrates. They can be broadly classified as monosaccharides, disaccharides and polysaccharides depending on their behavior towards hydrolysis. They are also classified as reducing or non-reducing sugars. Another class of biomolecules is proteins which are polymers of twenty different amino acids linked by peptide bonds. Amino acids can be classified as acidic, basic or neutral depending on the relative number of amino and carboxyl groups in their
molecule. The essential amino acids cannot be synthesized by our body and hence must be provided through diet. Nucleic acids are the polymers of nucleotides which in turn consist of a base, pentose sugar and phosphate. There are two types of nucleic acids namely, DNA and RNA which differ in the composition of sugar and a base
The sugar moiety in DNA and RNA molecules, respectively, are

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As aldehydes ketones possess the carbonyl functional group, they show similar reactions. They exhibit nucleophilic addition reactions, reduction, oxidations, reactions due to alpha-Hydrogen atom, and many other reactions, like Cannizzaro reaction to electrophilic substitution reactions (in case of aromatic aldehydes ketones).
These reactions help in the preparation of a number of important compounds, like acetic acid, vinyl acetate, polymers and in perfume and dye industries. Nucleophilic addition reactions form cyanohydrins, acetals, alcohols and N -substituted derivatives like imine, oxime, semicarbazone, phenylhydrazone Schiff's base. Reactions due to alpha-hydrogen atoms help in formation of aldols and alpha, beta-unsaturated aldehydes ketones.
Which of the following does not give iodoform test?


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Three capacitors each of capacitance 9 pF are connected in series. The capacitance of the combination would be :

If \(\theta\) is the angle between any two vectors \(\vec{a}\) and \(\vec{b}\), then \(|\vec{a} \cdot \vec{b}|=|\vec{a} \times \vec{b}|\) for \(\theta\) equal to __________.

GM plant/crop are:
(A) Rich in vitamins
(B) Pest resistant
(C) Prone to post harvest loss
(D) More tolerant to drought
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Observe the figure and answer the following:


Identify the true statements:
A. Stable genetic equilibrium results in evolution
B. Genetic equilibrium means the constant gene pool in population remains constant
C. In a given population one can find out the frequency of occurrence of alleles of a gene or a locus
D. The frequency of occurrence of alleles of a gene remain same through generations
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