Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Butan -1- ol has higher boiling point than ethoxyethane. Reason R: Extensive hydrogen bonding leads to stronger association of molecules. In the light of the above statements, choose the correct answer from the options given below:

The water gas on reacting with cobalt as a catalyst forms

The strongest acid from the following is

Given below are two statements : Statement I : Sulphanilic acid gives esterification test for carboxyl group. Statement II : Sulphanilic acid gives red colour in Lassigne's test for extra element detection. In the light of the above statements, choose the most appropriate answer from the options given below :

In Dumas method for the estimation of ${\mathrm{N}}_2$, the sample is heated with copper oxide and the gas evolved is passed over :

Compound that will give positive Lassaigne's test for both nitrogen and halogen is :

In Carius tube, an organic compound '$$\mathrm{X}$$' is treated with sodium peroxide to form a mineral acid 'Y'. The solution of $${\mathrm{BaCl}}_2$$ is added to '$$\mathrm{Y}$$' to form a precipitate 'Z'. 'Z' is used for the quantitative estimation of an extra element. '$$\mathrm{X}$$' could be

Given below are two statements: Statement I : Aqueous solution of K$${}_2$$Cr$${}_2$$O$${}_7$$ is preferred as a primary standard in volumetric analysis over Na$${}_2$$Cr$${}_2$$O$${}_7$$ aqueous solution. Statement II : K$${}_2$$Cr$${}_2$$O$${}_7$$ has a higher solubility in water than Na$${}_2$$Cr$${}_2$$O$${}_7$$. In the light of the above statements, choose the correct answer from the options given below:

A compound '$$\mathrm{X}$$' when treated with phthalic anhydride in presence of concentrated $${\mathrm{H}}_2{\mathrm{SO}}_4$$ yields '$$\mathrm{Y}$$'. '$$\mathrm{Y}$$' is used as an acid/base indicator. '$$\mathrm{X}$$' and '$$\mathrm{Y}$$' are respectively

Given below are two statements: Statement I : Methyl orange is a weak acid. Statement II : The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form. In the light of the above statement, choose the most appropriate answer from the options given below:

Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top} .tg .tg-7btt{border-color:inherit;font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} LIST I Element detected LIST II Reagent used / Product formed A. Nitrogen I. $$\mathrm{N}{\mathrm{a}}_2[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NO}]$$ B. Sulphur II. $$\mathrm{AgN}{\mathrm{O}}_3$$ C. Phosphorous III. $$\mathrm{F}{\mathrm{e}}_4[\mathrm{Fe}(\mathrm{CN}{)}_6{]}_3$$ D. Halogen IV. $$(\mathrm{N}{\mathrm{H}}_4{)}_2\mathrm{Mo}{\mathrm{O}}_4$$ Choose the correct answer from the options given below:

Given below are two statements: Statement I : In redox titration, the indicators used are sensitive to change in $$\mathrm{pH}$$ of the solution. Statement II : In acid-base titration, the indicators used are sensitive to change in oxidation potential. In the light of the above statements, choose the most appropriate answer from the options given below

$$2{\mathrm{IO}}_3^{-}+x{\mathrm{I}}^{-}+12{\mathrm{H}}^{+}\to 6{\mathrm{I}}_2+6{\mathrm{H}}_2\mathrm{O}$$ What is the value of $$x$$ ?

Which of the following options are correct for the reaction $$2{\left[\mathrm{Au}(\mathrm{CN}{)}_2\right]}^{-}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s})\to 2\mathrm{Au}(\mathrm{s})+{\left[\mathrm{Zn}(\mathrm{CN}{)}_4\right]}^{2-}(\mathrm{aq})$$ A. Redox reaction B. Displacement reaction C. Decomposition reaction D. Combination reaction Choose the correct answer from the options given below:

The correct order of bond enthalpy ($$\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$$) is :

For electron gain enthalpies of the elements denoted as $${\Delta }_{\mathrm{eg}}\mathrm{H}$$, the incorrect option is :

The Lewis acid character of boron tri halides follows the order :

Given below are two statements : Statement I: Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green Statement II: The green colour observed is due to the formation of copper(I) metaborate In light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements: Statement I : Chlorine can easily combine with oxygen to form oxides; and the product has a tendency to explode. Statement II : Chemical reactivity of an element can be determined by its reaction with oxygen and halogens. In the light of the above statements, choose the correct answer from the options given below :

Boric acid is solid, whereas ${\mathrm{BF}}_3$ is gas at room temperature because of :