Number of hydrogen bond formed between adenine and thymine to connect each other is /are

Which of the following reagents are used for denaturation of alcohol?

To prepare 250 mL standard solution of M/20 \(\text{NaCl}\), amount of \(\text{NaCl}\) required is :

Thiosulphte \(\mathrm{S}_2 \mathrm{O}_3^{2-}\) is oxidized to __________ in presence of permanganate ion.

Arrange the following in increasing order of their basic strength
(I) \(C_6H_5NH_2\)
(II) \(C_2H_5NH_2\)
(III) \(NH_3\)

Match List - I (reagent) with List - II (Transformations)

List - I (Reducing Agent)	List - II (Transformations)
(A) Sodium Borohydride	(I) Aldehyde to alkane
(B) \(SnCl _2\) and HCl	(II) aldehydes to Primary alcohols
(C) Zn-Hg and conc. HCl	(III) Nitriles to Imine
(D) DIBAL-H	(IV) Ester to aldehyde

Choose the correct answer.

Read the passage carefully and answer the Questions
Aldehydes and ketones are important organic compounds prepared mainly by oxidation of alcohols. Primary alcohols give aldehyde and secondary alcohols yield ketones. Aldehydes can also be formed by partial reduction of acid chlorides, reduction of esters or by Gattermann-Koch reaction. Ketones are prepared by Friedel-Craft's acylation, hydration of alkyne and reaction of Grignard's reagent with nitriles. Chemically, aldehydes and ketones are reactive in nature due to the carbonyl group and undergo nucleophilic addition reactions. Aldehydes are more reactive than ketones and can be oxidized to carboxylic acids, while both can be reduced to alcohols or hydrocarbons and exhibit condensation reaction.
When two moles of benzaldehyde are heated with concentrated NaOH solution, the product/s obtained is/are:

Identify the correct statement(s) among the following:
(A) If three electrical cells each of emf, E and internal resistance r are connected in series to a resistance R, the current drawn from them is 3E/(R+3r).
(B) If these three cells are connected in parallel combination, across resistance R then the current drawn will be E/(3R+r).
(C) If the two cells are connected in series and then one in parallel which are then connected across resistance R, then the current drawn will be 2E/(2R+2r).
(D) In a mixed grouping of cells, current will be maximum when total external resistance is equal to total equivalent internal resistance.
Choose the correct answer from the options given below :

The general solution of the differential equation \(y d x-\left(x+2 y^2\right) d y=0\) is:

What is the unit of electric flux in terms of the base units of SI?

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

The minimum value of \(Z = 2x + y\) subjected to \(x + y ≥ 10, 2x + 3y ≤ 26, x, y ≥ 0\) is

A light of wavelength of \( \lambda = 6 \times 10^{-7} \text{ m} \) illuminates a single slit of width \( a = 1.2 \text{ mm} \). The screen is at a distance of \( D = 2.4 \text{ m} \) away from the slit. The width of central maximum (\( \beta_0 \)) is