For a particular reaction taking place at \(\text{T} = 300 \text{ K}\), \(\text{E}_a= 300 \text{ kJ/mol}\) and \(\text{log k} = -3.45\); calculate the temperature at which the rate constant becomes 4 times that of k. (Given \(\text{log } 2 = 0.3010\))

Which of the following statement is \text{\textbf\{incorrect\}?}

The coordination number \(( CN )\) and oxidation state \(( OS )\) of Co in \(\left[ Co \left( C _2 O _4\right)_3\right]^{3-}\) is.

Amongst the following ions which one has the highest magnetic moment value?

The reaction of phenol with chloroform in the presence of sodium hydroxide gives

Answer the question on the basis of passage given below:
In the periodic table, the d-block contains the elements of group \(3\) to \(12\). The d-orbitals are progressively filled in each of the four long periods. The elements of d block referred as transition metals have partly filled d orbitals and exhibit certain characteristic properties such as variety of oxidation states, formation of coloured ions, act as catalyst and show paramagnetic behaviour.
The two inner transition metals series \(4f\) and \(5f\) are known as Lanthanoids and Actinoids respectively. The lanthanoids resemble one another more closely as compared to ordinary transition elements in any series.
The bonds present in the structure of dichromate ion are:

Out of the following given statements, the incorrect statements are;
(A) 2, 2, 6-Trimethylcyclohexanone forms a cyanohydrin in good yield, but the cyclohexanone doesn't.
(B) There are two amino groups in semicarbazide and both can be involved in the formation of semicarbazones.
(C) Mononitration of benzaldehyde will form m-nitrobenzaldehyde.
(D) Mononitration of acetophenone will form m-nitroacetophenone.
Choose the correct answer from the options given below:

Consider the Linear Programming Problem
Maximize \(z=x+y\)
Subject to the constraints \(x-y \leq-1, x \geq y, x \geq 0, y \geq 0\)
Then which one of the following is TRUE?

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

List-I (Complexes)	List-II (No. Of unpaired electrons.)
(A) \(\left[ Ti \left( H _2 O \right)_6\right]^{3+}\)	(I) 1
(B) \(\left[ NiF _6\right]^{4-}\)	(II) 5
(C) \(\left[ Fe ( CN )_6\right]^{4-}\)	(III) 2
(D) \(\left[ MnF _6\right]^{4-}\)	(IV) 0

Choose the correct answer from the options given below:

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

For (i) \(I^-\) (ii) \(Cl^-\)(iii) \(Br^-\), the usual increasing order of nucleophilicities would be

Two concentric circular coils of 10 turns each are situated in the same plane. Their radii are 20 cm and 40 cm and they carry 0.2 A and 0.3 A currents respectively in opposite directions. The magnetic field at the center is:

To form n-type semiconductor from a pure semiconductor, the impurity to be added is