List of practice Questions

Identify the set of paramagnetic ions among the following:

Phosphorus pentachloride

Incorrectly matched pair is:

Bond angle in $PH^+_4$ is more than that of $PH_3$. This is because

Aqueous solution of a salt $(A)$ forms a dense white precipitate with $BaCl_2$ solution. The precipitate dissolves in dilute $HCl$ to produce a gas $(B)$ which decolourises acidified $KMnO_4$ solution $A$ and $B$ respectively are :

sulphide are on roasting gives a gas x. x reacts with cl₂ in the presence of activated charcoal to give Y.Y is:

If \(\begin{pmatrix} 2 & 1 \\ 3 & 2 \\ \end{pmatrix}A=\begin{pmatrix} 1 & 0 \\ 0 & 1 \\ \end{pmatrix}\), then the matrix A is

If A and B are square matrices of same order and B is a skew symmetric matrix, then A’BA is

The rate constant of a reaction is given by $k=P Ze^{-Ea/RT}$ under standard notation. In order to speed up the reaction, which of the following factors has to be decreased ?

If A = \(\begin{pmatrix} 0 & 0 & 1 \\ 0 & 1 & 0 \\ 1 & 0 & 0 \\ \end{pmatrix}\), then A⁴ is equal to

During the adsorption of gas on a solid

The value of \(\cos(\sin^{-1}\frac{\pi}{3}+\cos^{-1}\frac{\pi}{3})\) is

Copper is extracted from copper pyrites by

A sol of $AgI$ is prepared by mixing equal volumes of $0.1M \, AgNO_3$ and $0.2M KI$, which of the following statement is correct ?

The domain of the function defined by f(x) = \(\cos^{-1}\sqrt{x-1}\) is

For an elementary reaction $2A+3B \to 4C+D$ the rate of appearance of $C$ at time $t$ is $2.8\times10^{-3} \,mol \,L^{-1}S^{-1}$. Rate of disappearance of $B$ at $t$ will be

If A = {a, b, c}, then the number of binary operations on A is

Let f : [2, ∞) → R be the function defined by f(x) = x² - 4x + 5 , then the range of f is

If an aqueous solution of NaF is electrolyzed between insert electrodes, the product obtained at anode is

If a relation R on the set {1, 2, 3} be defined by R = {(1, 1)}, then R is

The time required for $60\%$ completion of a first order reaction is $50$ min. The time required for $93.6\%$ completion of the same reaction will be

If A, B, C are three mutually exclusive and exhaustive events of an experiment such that P(A) = 2P(B) = 3P(C),then P(B) is equal to

In which of the following cases a chemical reaction is possible ?

Given E⁰_Fe+3/Fe+2=+0.76V and E⁰½2l^-=+0.55V. The equilibrium constant for the reaction taking place in galvanic cell consisting of above two electrodes is [\(\frac{2.303RT}{F}\)=0.06]