List of practice Questions

Why is \([Ti(H_2O)_6]^{3+}\) coloured?

Write IUPAC name of the given complex: \( K_3[Cr(C_2O_4)_3] \)
Assertion (A): Phenol gives 2,4,6-trinitrophenol on treatment with concentrated \( HNO_3 \) and concentrated \( H_2SO_4 \).
Reason (R): –OH group in phenol is \( m \)-directing.
Assertion (A): D (+)-Glucose is dextrorotatory.
Reason (R): Symbol ‘D’ represents its dextrorotatory nature.
Assertion (A): Zn, Cd and Hg are not regarded as transition elements.
Reason (R): Zn, Cd and Hg do not have partially filled d-orbitals in their ground state or in any one of their common oxidation states.
Assertion (A): Benzene diazonium salt is stable and can be easily stored.
Reason (R): Benzene diazonium chloride decomposes easily.
The rate of a reaction quadruples when the temperature changes from 293 K to 313 K. Calculate the energy of activation of the reaction, assuming that it does not change with temperature. \[ (\log 2 = 0.30,\; \log 4 = 0.60) \quad [R = 8.314\; J\, K^{-1}\, mol^{-1}] \]
What would be the major product of the given reaction? \[ HCHO + CH_3MgI \xrightarrow{H_2O} \; ? \]
Pentan-2-one and Pentan-3-one can be distinguished by:
Hoffmann Bromamide Degradation reaction is given by:
Given below is the decomposition of hydrogen peroxide in alkaline medium, which is catalysed by iodide ions: \[ 2H_2O_2 \xrightarrow{I^-, \; \text{alkaline medium}} 2H_2O + O_2 \] The above reaction takes place in two steps:
Step I: \( H_2O_2 + I^- \longrightarrow H_2O + IO^- \) (slow)
Step II: \( H_2O_2 + IO^- \longrightarrow H_2O + I^- + O_2 \)
Molecularity of Step I and Step II is:
Oxidation state of central metal atom in the given complex is: \[ [Co(NH_3)_4(H_2O)_2]Cl_3 \]
A galvanic cell can behave as an electrolytic cell when:
Which type of isomerism is shown by the complexes \([Co(NH_3)_5Br]SO_4\) and \([Co(NH_3)_5SO_4]Br\) ?
Unit of rate constant for the zero order reaction is:

Three compounds are given below:
 
The correct decreasing order of their basic strength is:

A reaction follows second order kinetics. How is the rate of reaction affected if the concentration of the reactant is reduced to half? Choose the correct value from the following:
Solutions of two electrolytes X and Y are diluted. Molar conductivity of X increases 25 times whereas that of Y increases 1.5 times. Which one is a stronger electrolyte?
Which of the following reactions is a halogenated exchange reaction:
The most common oxidation state for all lanthanoids is:
Choose the compound which is more acidic than phenol:
Let $f^1(x)=\frac{3 x+2}{2 x+3}, x \in R -\left\{\frac{-3}{2}\right\}$ For $n \geq 2$, define $f^{ n }(x)=f^1 o f^{ n -1}(x)$ if $f^5(x)=\frac{ a x+ b }{ b x+ a }, \operatorname{gcd}( a , b )=1$, then $a + b$ is equal to ______ .
Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is NH3, AICI3, BeCl2, CCl4, PCI5 :
If the coefficients of \((5r+4)th\) term and \((r-1)th\) term in the expansion of \((1+x)^{25}\) are equal, then \(r\) is 
The remainder when 7103 is divided by 17, is