The coagulation of \(200 \mathrm{ml}\) of a positive colloid took place when \(0.73 \mathrm{~g}\) of \(\mathrm{HCl}\) was added to it without changing the volume much. The flocculation value of \(\mathrm{HCl}\) for the colloid is

Which of the following reaction gives nitrogen (II) oxide as one of the products?

Conversion of X to Y in the above reaction is

The number of lone pairs of electrons on central atom of \(\mathrm{CFF}_3, \mathrm{NF}_3, \mathrm{SF}_4, \mathrm{XeF}_4\) respectively are

\(x\) grams of calcium carbonate was completely burnt in air. The weight of the solid residue formed is \(28 \mathrm{~g}\). What is the value of \(x\) (in grams)?

With reference to the redox properties of hydrogen peroxide \(\left(\mathrm{H}_2 \mathrm{O}_2\right)\), which of these reactions are feasible? (i) \(2 \mathrm{Fe}^{2+} 2 \mathrm{H}^{+}+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow 2 \mathrm{Fe}^{3+}+2 \mathrm{H}_2 \mathrm{O}\) (ii) \(2 \mathrm{MnO}_4^{-}+6 \mathrm{H}^{+}+5 \mathrm{H}_2 \mathrm{O}_2 \longrightarrow 2 \mathrm{Mn}^{2+}\) \(+8 \mathrm{H}_2 \mathrm{O}+5 \mathrm{O}_2\) (iii) \(2 \mathrm{Fe}^{2+}+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow 2 \mathrm{Fe}^{3+}+2 \mathrm{OH}^{-}\) (iv)\(2 \mathrm{MnO}_4^{-}+3 \mathrm{H}_2 \mathrm{O}_2 \longrightarrow 2 \mathrm{MnO}_2+2 \mathrm{H}_2 \mathrm{O}\) \(+3 \mathrm{O}_2+2 \mathrm{OH}^{-}\)

Consider the following reaction sequence. (A) and (C) are

An executive in a company makes on an average $5$ telephone calls per hour at a cost of Rs. $2$ per call. The probability that in any hour the cost of the calls exceeds a sum of Rs. $4$ is

\(75 \mathrm{~mL}\) of \(0.2 \mathrm{M} \mathrm{HCl}\) is mixed with \(25 \mathrm{~mL}\) of \(1 \mathrm{M}\) \(\mathrm{HCl}\). To this solution, \(300 \mathrm{~mL}\) of distilled water is added. What is the \(\mathrm{pH}\) of the resultant solution?

Suppose \(\alpha, \beta, \gamma\) are the roots of \(x^3+x^2+x+2=0\). Then, the value of \(\left(\frac{\alpha+\beta-2 \gamma}{\gamma}\right)\left(\frac{\beta+\gamma-2 \alpha}{\alpha}\right)\left(\frac{\gamma+\alpha-2 \beta}{\beta}\right)\) is

If \(A, B\) and \(C\) are mutually exclusive and exhaustive events of a random experiment such that \(P(B)=\frac{3}{2} P(A)\) and \(P(C)=\frac{1}{2} P(B)\), then \(P(A \cup C)\) equals to

If \(\quad f:[-2,2] \rightarrow R \quad\) is defined by \(f(x)=\left\{\begin{array}{cc}\frac{\sqrt{1+c x}-\sqrt{1-c x}}{x} & \text { for }-2 \leq x < 0 \ \frac{x+3}{x+1} & \text { for } 0 \leq x \leq 2\end{array}\right.\) continuous on \([-2,2]\), then \(c\) is equal to

Arrange the following in the correct order of their reactivity towards nucleophilic addition reactions