List of practice Questions

Which of the following statements is correct ?

Pneumatophores occur in

Sweet potato is a modified

The correction factor ‘a’ to the ideal gas equation corresponds to

Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s² 2s² 2p³ , the simplest formula for this compound is

Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900°C (assuming molar mass and atomic radii of iron remains constant with temperature) is

Consider the following species :
CN⁺, CN^–, NO and CN
Which one of these will have the highest bond order ?

Which one is a wrong statement ?

Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity ?

Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is

Among CaH₂ , BeH₂ , BaH₂ , the order of ionic character is

In which case is the number of molecules of water maximum ?

Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below :

Then the species undergoing disproportionation is

When initial concentration of the reactant is doubled, the half-life period of a zero order reaction

For the redox reaction
\(MnO_4^-+C_2O^{2-}_4+H^+→Mn^{2+}+CO_2+H_2O\)
the correct coefficients of the reactants for the balanced equation are

Which one of the following conditions will favour maximum formation of the product in the reaction,
A₂(g) + B₂(g) ⇌ X₂(g) Δ_rH = – X kJ ?

Which one of the following ions exhibits d-d transition and paramagnetism as well ?

Iron carbonyl, Fe(CO)₅ is

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code :

Column I		Column II
a.	Co3+	i.	\(\sqrt8\) B.M.
b.	Cr3+	ii.	\(\sqrt{35}\) B.M.
c.	Fe3+	iii.	\(\sqrt3\) B.M.
d.	Ni2+	iv.	\(\sqrt{24}\) B.M.
		v.	\(\sqrt{15}\) B.M.

The geometry and magnetic behaviour of the complex [Ni(CO)₄] are

The correct difference between first- and second-order reactions is that

Which of the following carbocations is expected to be most stable ?

Which of the following is correct with respect to – I effect of the substituents ? (R = alkyl)

The type of isomerism shown by the complex [CoCl₂(en)₂] is

The difference between amylose and amylopectin is