Curium (Cm) belongs to 5f series. Its atomic number is 96. Which of the following is the correct electronic configuration of Curium?

What is the value of van't Hoff factor for complete dissociation of K2SO4 ?

The characteristic oxidation state of Lanthanoids is +3, but Ce shows +4 oxidation state because…
(A) It has variable ionization enthalpy
(B) It has a tendency to attain noble gas configuration
(C) It has a tendency to attain \(f^0\) configuration
(D) It resembles \(\mathrm{Pb}^{4+}\)

The reaction for the conversion of phenol into salicylic acid is known as

Match the complex given in List - I with the number of unpaired electrons given in List - II

List-I (Complex)	List-II (Number of unpaired electrons (n))
(A) \(\left[ NiCl _4\right]^{2-}\)	(I) 5
(B) \(\left[ Co \left( NH _3\right)_6\right]^{3 +}\)	(II) 1
(C) \(\left[ FeF _6\right]^{3-}\)	(III) 2
(D) \(\left[ Fe ( CN )_6\right]^{3-}\)	(IV) \(0\)

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Chlorine is extracted from brine by:

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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
"Maltose" disaccharide is composed of

Which of the following haloalkanes reacts with aqueous \(\text{KOH}\) most easily ?

Which of the following are true for optical instruments?
(A) A simple microscope is a converging lens of large focal length.
(B) A telescope is used to provide angular magnification of distant objects.
(C) The objective lens of a telescope has a smaller focal length than the eyepiece.
(D) The magnifying power of a telescope is the ratio of the focal length of the objective lens
to the focal length of the
eyepiece.
(E) A simple microscope is a converging lens of small focal length
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The integral \(I=\int \frac{e^x}{1-e^{2 x}} d x\) is equal to :

If \(\cos ^{-1} \sqrt{3} x+\cos ^{-1} x=\frac{\pi}{2}\), then the value of \(x\) is :

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Carboxylic acids are the earliest organic compounds isolated from nature. These are also known as organic acids but are weaker acids as compared to mineral acids. However, they are more acidic than alcohols and phenols because of greater resonance stabilization of the parent acid and its conjugate base. The acidic strength is determined by the \(K _a\), which is called the acidity constant.
The greater the value of \(K _a\), the greater the tendency of the acid to ionize and hence the stronger the acid. The acidic strength of the saturated aliphatic carboxylic acid depends upon the inductive effect and its position with respect to - COOH groups. Electron -donating substituents tend to decrease whereas electron-withdrawing substituents tend to increase the acidic strength. The acidic strength of the aromatic carboxylic acid, on the other hand depends upon both the inductive effect and the resonance effect of the substituents.
Arrange the following acids in decreasing order of acidity
(A) \(CH _3 CH _2 OH\)
(B) \(CH _3 COOH\)
(C) \(BrCH _2 COOH\)
(D) \(C _6 H _5 CH _2 COOH\)
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The 'lungs of the planet' name is given to :