1. ASSERTION : Benzene reacts with iodine monochloride in presence of anhyd. AlCl3 to form iodobenzene. REASON : Iodine monochloride reacts with anhyd. AlCl3 to produce I+ which attacks the benzene ring.
Correct!
Wrong!
2. ASSERTION : At the same temperature, water has higher vapour pressure than acetic acid. REASON : Hydrogen bonding in water is weaker than in acetic acid.
Correct!
Wrong!
3. ASSERTION : The conductivity of metals decreases with increase of temperature whereas that of electrolytic solution increases. REASON : Electrons in metals are very tightly held by the nucleus and are not free to move.
Correct!
Wrong!
4. ASSERTION : Pure iron when heated in dry air is covered with a layer of rust. REASON : Rust has the composition Fe3O4.
Correct!
Wrong!
5. ASSERTION : Colloidal particles show Brownian movement. REASON : Brownian movement arises because of the impact of the molecules of the dispersion medium with the colloidal particles.
Correct!
Wrong!
6. ASSERTION : A chelating ligand must possess two or more lone pairs at such a distance that it may form suitable strain free 5-6 membered rings with the metal ion. REASON : H2N–NH2 is a chelating ligand.
Correct!
Wrong!
ASSERTION : Nucleophilic substitution reaction on an optically active alkyl halide gives a mixture of enantiomers. REASON : The reaction occurs by SN1 mechanism.
Correct!
Wrong!
8. ASSERTION : Carboxylic acids do not give characteristic reactions of carbonyl group. REASON : Carboxylic acids exist as cyclic dimers in solid, liquid and even in vapour state.
Correct!
Wrong!
9. ASSERTION : β-pleated sheet structure of protein shows maximum extension. REASON : Intermolecular hydrogen bonding is present in them.
Correct!
Wrong!
10. ASSERTION : Sulpha drugs contain sulphonamide group. REASON : Salvarsan is a sulpha drug.
Correct!
Wrong!
a&r QUIZ CHEMISTRY DAY-6
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