For an endothermic reaction, energy of activation is \(E_a\) and enthalpy of reaction is \(\Delta H\)
(both of these are in \(kJ'\) mol\(^{-1}\)), minimum value of \(E_a\) will be :

A solution of 2.5 g of ethanoic acid in 75 g of benzene is prepared. What is the molar mass of ethanoic acid, moles of ethanoic acid, mass of benzene and molality of ethanoic acid?
(A) \(0.556 \text{ mol } kg^{-1}\)
(B) \(0.0417 \text{ mol}\)
(C) \(60 \text{ g } mol^{-1}\)
(D) \(0.075 \text{ kg}\)
Choose the correct answer from the options given below:

The order of the following reaction will be :
\(2FeCl_3 + SnCl_2 \rightarrow 2FeCl_2 + SnCl_4\)

Reaction occurring at cathode is
\(HgO+H_2 O+2 e^{-} \rightarrow Hg+2 OH^{-}\)
Above reaction is found in :

Vitamin B12 is a coordination compound of _______

Aspartame is used in cold foods and soft drinks even though it is roughly 100 times as sweet as cane sugar and can pose a health hazard because:

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 sugar moiety in DNA and RNA molecules, respectively, are

A uniformly charged sphere of \( 80 \text{ } \mu\text{C} \) and radius 2 cm is placed in air.
The electric field intensity at a point 20 cm from the center of the sphere is:

The different methods of producing plane polarised light are
(A) Reflection
(B) Scattering
(C) Double Refraction
(D) Selective absorption
Choose the correct answer from the options given below:

Sulphur molecule at room temperature is

If A is any non-zero square matrix, then the matrix \(P=\frac{1}{2}\left(A-A^T\right)\) is:

Myotonic dystrophy is an/a -

A wire has a resistance of \( 2.1 \, \Omega \) at \( 25^\circ \text{C} \) and a resistance of \( 2.8 \, \Omega \) at \( 100^\circ \text{C} \). The temperature coefficient of the resistance is :