Chemistry Test ...

The substance that __________ the activity of catalysts is poisoner.

On increasing the temperature by \(10^{\circ} \mathrm{C}\):

If \(1.202 {~g} {~mL}^{-1}\) is the density of \(20 \%\) aqueous KI, determine themolality of KI.

Which of the following is the 'fifth state of matter'?

The value of n in the molecular formula Be_nAl₂Si₆O₁₈ is:

Calculate the mass of ascorbic acid ( \(\mathrm{C}_{6} \mathrm{H}_{8} \mathrm{O}_{6}\) ) to be dissolved in \(75 \mathrm{~g}\) of acetic acid to lower its melting point by \(1.5^{\circ} \mathrm{C}\). Take \( \mathrm{K}_{\mathrm{f}}=3.9 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\).

Coal is the chief source of:

A gas has molecular formula \((C H)_{n}\). If vapour density of the gas is 39 , what should be the formula of the compound?

In a \(13L\) vessel initially, the following reaction occurs:

\(C(s)+S 2(g) \Rightarrow C S,(g)\) by \(12 g = C, 64 g = S_{2},76g = CS_{2}\), at \(1027^{\circ} \mathrm{C}\) temperature then total pressure is:

For an elementary reaction \(2 \mathrm{~A}+\mathrm{B} \longrightarrow \mathrm{A}_{2} \mathrm{~B}\), if the volume of vessel is quickly reduced to half of its original volume, then what will happen to the rate of reaction?