Chemistry Test-...

A system absorbs 300 cal of heat as a result that, the volume of the system becomes double the initial volume and temperature changes from 273K to 546K. the work done by the system on the surroundings is 200.0 cal. Calculate ΔE:

Which of the following is/are a phospholipid(s)?

\(\mathrm{XeF}_{6}\) dissolves in anhydrous \(\mathrm{HF}\) to give a conducting solution which contains:

Which of the following represents the incorrect order of property mentioned?

Isoelectric point is the pH at which colloidal particles:

Which of the following expressions is correct between the van der Waals constant b and the radius r of spherical molecules?

Identify the correct order of reactivity in electrophilic substitution reactions of the following compounds:

When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution, the ratio of volumes of hydrogen gas evolved is:

The coordination number of a central metal atom in the complex is determined by:

Which of the following is a narcotic analgesic?

Two reactions, \(A \rightarrow\) Products and \(B \rightarrow\) Products, have rate constants \(\mathrm{K}_{\mathrm{a}}\) and \(\mathrm{K}_{\mathrm{b}}\) at temperature \(\mathrm{T}\) and activation energies \(E_{a}\) and \(E_{b}\) respectively. If \(\mathrm{K}_{\mathrm{a}}>\mathrm{K}_{\mathrm{b}}\) and \(\mathrm{E}_{\mathrm{a}}<\mathrm{E}_{\mathrm{b}}\) and assuming that \(\mathrm{A}\) for both the reactions is same then:

The leaching of \(\mathrm{Ag}_{2} \mathrm{~S}\) is carried out by heating it with a dilute solution of:

\(20 \mathrm{~mL}, 0.2 \mathrm{M} \mathrm{NaOH}(\mathrm{aq})\) solution is mixed with \(35 \mathrm{~mL}, 0.1 \mathrm{M} \mathrm{NaOH}(\mathrm{aq})\) solution, and the resultant solution is diluted to \(100 \mathrm{~mL} .40 \mathrm{~mL}\) of this diluted solution reacted with a \(10 \%\) impure sample of oxalic acid \(\left(\mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4}\right)\). The weight of the impure sample is:

Aqueous solutions of two compounds \(\mathrm{M}_{1}-\mathrm{O}-\mathrm{H}\) and \(\mathrm{M}_{2}-\mathrm{O}-\mathrm{H}\) are prepared in two different beakers, If the electronegativity of \(\mathrm{M}_{1}=3.4, \mathrm{M}_{2}=1.2, \mathrm{O}=3.5\) and \(\mathrm{H}=2.1\), then the nature of two solutions will be respectively:

2,4-pentanedione is treated with excess of KCN in acetic acid solution and finally hydrolysed with dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\) giving products only with molecular formula \(\mathrm{C}_{7} \mathrm{H}_{12} \mathrm{O}_{6}\) (dicarboxylic acids). Mark the correct statement regarding product(s) of this reaction.