When phenol is treated with chloroform in the presence of \(NaOH\), the major product formed is ?

The mass of \(\text{NaOH}\) required to make a 500 mL solution of 0.5 molarity is

Colligative properties are applicable to:

The rate constant for a zero order reaction was found to be \(1.0 \times 10^{-3} mol L ^{-1} s^{-1}\).
How long will 1.0 mol of the reactant take to reduce to 0.5 mol in one liter flask?

Read the passage carefully and answer the questions:
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 side chain (R group) present in the "Aspartic Acid" amino acid is:

Read the passage carefully and answer the questions:
The degeneracy of the \(d\) orbitals has been removed due to ligand electron-metal electron repulsions in the octahedral comple: to yield three orbitals of lower energy, \(t_{2 g}\) set and two orbitals of higher energy, \(e_g\) set. This splitting of the degenerate levels due to the presence of ligands in a definite geometry is termed as crystal field splitting and the energy separation is denoted by \(\Delta_0\). Thus energy of the two \(e_g\) orbitals will increase by \((3 / 5) \Delta_0\) and that of three \(t_{2 g}\) will decrease by \((2 / 5) \Delta_0\). The crystal field splitting \(\Delta_0\) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong fields, in which case the splitting will be large, whereas others produce weak fields and consequently result in small splitting of \(d\) orbitals. Relative magnitude of crystal field splitting energy \(\Delta_0\) and pairing energy, \(P\) (energy required for electron paring in a single orbital) determine the formation of low spin ( \(\Delta_0>P\) ) or high spin ( \(\Delta_0<P\) ) complex. In tetrahedral coordination entity formation, the \(d\)-orbital splitting is inverted and is smaller as compared to the octahedral field splitting. The crystal field theory attributes the colour of the complex to \(d-d\) transition of the electron. The colour of the coordination compounds depends on the crystal field splitting. In the absence of ligand, crystal field splitting does not occur and hence the substance is colourless.
Which of the following complex is not expected to be coloured?

Arrange the following compounds in increasing order of their solubility in water :
(A) n-butanol
(B) Butan-1-amine
(C) Methanamine
(D) Aniline

What is the IUPAC name of the product of hydration of propene in the presence of dilute sulphuric acid?

Let \(A\) be a \(3 \times 7\) matrix, then each column of \(A\) contains :

If \(A\) is a square matrix and \(I\) is an identity matrix of same order such that \(A^2=A\), then \((2 I+A)^2-5 A\) is :

Examples of corrosion include
(A) Rusting of iron
(B) Tarnishing of silver
(C) Green coating on copper and bronze
(D) Zinc coating on iron
Choose the correct answer from the options given below:

Which of the following steps are related to polymerase chain reaction (PCR)?
(A) Extension
(B) Annealing
(C) Propagation
(D) Denaturation
Choose the correct answer from the options given below:

An ac source has a frequency of 60 Hz. The time taken for the voltage to change from peak value to zero is :