The presence or absence of hydroxyl group on which carbon atom of sugar differentiate RNA and DNA :

The pair(s) of co-ordination complexes/ions exhibiting the same kind of isomerism is/are :
(A) \(\left[ Cr \left( NH _3\right)_5 Cl \right] Cl _2\) and \(\left[ Cr \left( NH _3\right)_4 Cl _2\right] Cl\)
(B) \(\left[ Co \left( NH _3\right)_4 Cl _2\right]^{+}\)and \(\left[ Pt \left( NH _3\right)_2\left( H _2 O \right) Cl \right]^{+}\)
(C) \(\left[ CoBr _2 Cl _2\right]^{2-}\) and \(\left[ PtBr _2 Cl _2\right]^{2-}\)
(D) \(\left[ Pt \left( NH _3\right)_3\left( NO _3\right)\right] Cl\) and \(\left[ Pt \left( NH _3\right)_3 Cl \right] Br\)
Choose the correct answer from the options given below :

Match List-I with List-II

List-I ( Common name)	List-II ( IUPAC name)
(A) Vinyl Chloride	(I) 1-Chloro-2-methylbenzene
(B) Chloroform	(II) Dichloromethane
(C) Methylene chloride	(III) Trichloromethane
(D) o-Chlorotoluene	(IV) Chloroethene

Choose the correct answer from the options given below:

Which of the following will exhibit only +3 oxidation state?

"Choose the reactions given by \(\text{Cr}_2\text{O}_7^{2-}\)
(A)\(\text{Cr}_2\text{O}_7^{2-} + 14\text{H}^+ + 6\text{Fe}^{2+} \rightarrow 2\text{Cr}^{3+} + 6\text{Fe}^{3+} + 7\text{H}_2\text{O}\)
(B) \(\text{Cr}_2\text{O}_7^{2-} + 14\text{H}^+ + 3\text{H}_2\text{S} \rightarrow 2\text{Cr}^{3+} + 3\text{SO}_4^{2-} + 7\text{H}_2\text{O}\)
(C) \(\text{Cr}_2\text{O}_7^{2-} + 14\text{H}^+ + 3\text{Sn}^{2+} \rightarrow 2\text{Cr}^{3+} + 3\text{Sn}^{4+} + 7\text{H}_2\text{O}\)
(D) \(\text{Cr}_2\text{O}_7^{2-} + 14\text{H}^+ \rightarrow 3\text{Cr}^{3+} + 2\text{H}_2\text{O}\)
(E) \(\text{Cr}_2\text{O}_7^{2-} + 2\text{OH}^- \rightarrow 2\text{CrO}_4^{2-} + \text{H}_2\text{O}\)
Choose the correct answer from the options given below:"

\(\mathrm{Cr}_2 \mathrm{O}_7^{2-}\) dissolves in aqueous NaOH to give:

Read the following passage given below and answer the question.
Production of electricity by thermal plants is not very efficient method. It is now possible to make cells in which reactants are fed continuously to the electrodes and products are also removed continuously. One of the most successful fuel cells is hydrogen fuel cell.
Which of the following statement is correct regarding hydrogen fuel cells?

Which of the following statements are correct related to electric potential energy?
(A) The electric potential energy is a vector quantity.
(B) The potential energy of two like charges is positive and for two unlike charges, it is negative.
(C) The work done by an electrostatic field in moving a charge from one point to another is independent of the path taken.
(D) The potential energy of an electric dipole in a uniform electric field is maximum, when the dipole moment is opposite to the electric field.
Choose the correct answer from the options given below:

Read the passage carefully and answer the Questions
The term vitamin was coined from the word vital +amine since the earlier identified compounds had amino groups. Later work showed that most of them didn't contain amino groups, so the letter "e" was dropped and ther term vitamin is used these days.
Vitamins are classified into two groups depending upon their solubility in water or fat. Fat soluble vitamins are soluble in fat and oils but insoluble in water. They are stored in liver and adipose (fat storing) tissues. Water-soluble vitamins are soluble in water. They must be supplied regularly in the diet as they are readily excreated in urine.
What are the sources of Vitamin B12?

How much current is needed to pass for 1 sec for depositing a metal with a mass equal to double of its electrochemical equivalent?

Current carrying wire produces:

Solution of \(\frac{d y}{d x}+y=2\) is:

In Kolbe's reaction, phenol undergoes :