Which of the following formula correctly represents the double salt "Carnallite"?

In Kolbe's reaction, phenol undergoes :

When dilute aqueous solution of \(\text{KI}\) (excess) is added to \(\text{AgNO}_3\) solution, the charge on the \(\text{AgI}\) colloidal, particles formed will be :

The correct statement(s) regarding the standard electrode potential, \(E^{\circ}\) are
(A) The standard electrode potential changes with the change in the concentration of electrolytes
(B) The standard electrode potential is always zero at 273 K
(C) The concentration of each ion in the solution is unity.
(D) All the gases involved are at 1 bar
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Magnetic moment of \(\text{Co}^{2+}\) will be

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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Read the passage carefully and answer the Questions
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.
Identify the amine possessing least basic strength

Match List-l with List-ll

List-l	List-ll
(A) \(f(x)=x \cdot \sin x\)	(I) is not continuous at \(x=-3\)
(B) \(f(x)=\frac{|x|}{x}, x \neq 0\) and \(f(x)=1\) at \(x=0\)	(II) is continuous everywhere
(C) \(f(x)=x-[x],[x]\) denotes greatest integer function	(III) is not differentiable at \(x=1\)
(D) \(f(x)=e^{|x-1|}\)	(IV) is not continuous at \(x=0\)

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Match List - I with List - II

List - I	List - II
(A) If vectors \(\vec{a}\) and \(\vec{b}\) are such that \(\vec{a}\) = \(\lambda \vec{b}\) and \(|\vec{a}|=|\vec{b}|\), then	(I) \(\vec{a}\) and \(\vec{b}\) are orthogonal
(B) Projection vector of \(\vec{a}\) on \(\vec{b}\)	(II) [0, 12]
(C) If \(\vec{a}\) and \(\vec{b}\) are non-zero vectors such that \(|\vec{a}+\vec{b}|=|\vec{a}-\vec{b}|\), then	(III) \(\vec{a}= \pm \vec{b}\)
(D) If \(|\vec{a}|=4\) and \(-3 \leq \lambda \leq 2\), then the range of \(|\lambda \vec{a}|\)	(IV) \(\left(\frac{\vec{a} \cdot \vec{b}}{|\vec{b}|^2}\right) \vec{b}\)

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Choose the correct statement/statements:
(A) Denaturation of protein causes loss of secondary and tertiary structure
(B) Nucleotides are joined together by diester linkage
(C) DNA contains Adenine, Guanine, cytosine and Uracil
(D) Amino acids show amphoteric behaviour
Choose the correct answer from the options given below :

The correct structure representing N,N-dimethylethanamine is

Continued self-pollination results in:

A thin infinite line charge has linear charge density of \( 2.0 \times 10^{-9} \text{ C/m} \). The electric field intensity at a distance of 3 m from the line charge is : (\( \frac{1}{4\pi\epsilon_0} = 9 \times 10^9 \))