List of practice Questions

Select the correct statements.
(A) Crystalline solids have long range order.
(B) Crystalline solids are isotropic.
(C) Amorphous solids are sometimes called pseudo solids.
(D) Amorphous solids soften over a range of temperatures.
(E) Amorphous solids have a definite heat of fusion.
Choose the most appropriate answer from the options given below :
If the Thompson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been :
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : SO$_2$(g) is adsorbed to a larger extent than H$_2$(g) on activated charcoal.
Reason R : SO$_2$(g) has a higher critical temperature than H$_2$(g).
In the light of the above statements, choose the most appropriate answer from the options given below.
The CORRECT order of first ionisation enthalpy is :
The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is :
The addition of silica during the extraction of copper from its sulphide ore

Match List - I with List - II : 

Choose the correct answer from the options given below : 
 

Number of Cl=O bonds in chlorous acid, chloric acid and perchloric acid respectively are :
To an aqueous solution containing ions such as Al$^{3+}$, Zn$^{2+}$, Ca$^{2+}$, Fe$^{3+}$, Ni$^{2+}$, Ba$^{2+}$ and Cu$^{2+}$ was added conc. HCl, followed by H$_2$S.
The total number of cations precipitated during this reaction is/are :
Given below are two statements :
Statement I : [Mn(CN)$_6$]$^{3-}$, [Fe(CN)$_6$]$^{3-}$ and [Co(C$_2$O$_4$)$_3$]$^{3-}$ are d$^2$sp$^3$ hybridised.
Statement II : [MnCl$_6$]$^{3-}$ and [FeF$_6$]$^{3-}$ are paramagnetic and have 4 and 5 unpaired electrons, respectively.
Choose the correct option.

Match List - I with List - II : 

Choose the correct answer from the options given below : 
 

Which one of the following set of elements can be detected using sodium fusion extract ?
Given below are two statements :
Statement I : Hyperconjugation is a permanent effect.
Statement II : Hyperconjugation in ethyl cation \( (\mathrm{CH_3-CH_2^+}) \) involves the overlapping of \( \mathrm{C_{sp^2}-H_{1s}} \) bond with empty \( 2p \) orbital of the other carbon.
Choose the correct option :

Consider the above reaction, the major product "P" formed is : 

 

Consider the above reaction, and choose the correct statement : 

 

The correct sequence of correct reagents for the following transformation is : 

 

What is A in the following reaction ? 

2SO$_2$(g) + O$_2$(g) $\rightarrow$ 2SO$_3$(g)
The above reaction is carried out in a vessel starting with partial pressures P$_{SO_2}$ = 250 m bar, P$_{O_2}$ = 750 m bar and P$_{SO_3}$ = 0 bar. When the reaction is complete, the total pressure in the reaction vessel is ________ m bar. (Round off to the Nearest Integer).
The total number of electrons in all bonding molecular orbitals of O$_2^{2-}$ is ________.
(Round off to the Nearest Integer).
When 400 mL of 0.2 M H$_2$SO$_4$ solution is mixed with 600 mL of 0.1 M NaOH solution, the increase in temperature of the final solution is ________ $\times 10^{-2}$ K. (Round off to the Nearest Integer).
[Use : H$^+$(aq) + OH$^-$(aq) $\rightarrow$ H$_2$O(l) ; $\Delta_r H$ = -57.1 kJ mol$^{-1}$
Specific heat of H$_2$O = 4.18 J K$^{-1}$ g$^{-1}$
density of H$_2$O = 1.0 g cm$^{-3}$
Assume no change in volume of solution on mixing.]
In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is ________ $\times 10^{-2}$. (Round off to the Nearest Integer).
The equilibrium constant for the reaction
A(s) $\rightleftharpoons$ M(s) + $\frac{1}{2}$O$_2$(g)
is K$_p$=4. At equilibrium, the partial pressure of O$_2$ is ________ atm. (Round off to the Nearest Integer).
For the cell Cu(s)|Cu$^{2+}$(aq) (0.1 M)||Ag$^+$(aq) (0.01 M)|Ag(s) the cell potential E$_1$ = 0.3095 V
For the cell Cu(s)|Cu$^{2+}$(aq) (0.01 M)||Ag$^+$(aq) (0.001 M)|Ag(s) the cell potential = ________ $\times 10^{-2}$ V. (Round off to the Nearest Integer).
[Use : $\frac{2.303 RT}{F} = 0.059$]
For the first order reaction $A \rightarrow 2B$, 1 mole of reactant A gives 0.2 moles of B after 100 minutes. The half life of the reaction is ________ min. (Round off to the Nearest Integer).
3 moles of metal complex with formula Co(en)$_2$Cl$_3$ gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is ________. (Round off to the Nearest Integer).