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CHEMISTRY DAY-10

Update on: 09 May 2019, 02:22 PM

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1. ASSERTION : Solubility of proteins is minimum at the isoelectric point. REASON : At isoelectric point, protein molecule behaves as a zwitter ion.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

2. ASSERTION : Phenol undergoes Kolbe reaction whereas ethanol does not. REASON : Phenoxide ion is more basic than ethoxide ion.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

3. ASSERTION : Ethers behave as bases in the presence of mineral acids. REASON : It is due to the presence of lone pair of electrons on the oxygen.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

4. ASSERTION : Acidic character of alcohols follows the order : primary > secondary > tertiary. REASON : Acidic character of alcohols is due to the presence of polar – O – H group.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

5. ASSERTION : Nucleophilic substitution reaction on an optically active alkyl halide gives a mixture of enantiomers. REASON : The reaction occurs by SN1 mechanism.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

6. ASSERTION : Nitrogen is unreactive at room temperature but becomes reactive at elevated temperatures or in presence of a catalyst. REASON : In nitrogen molecule, there is extensive delocalization of electrons.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

7. ASSERTION : Substances whose solutions cannot pass through filter paper are called as colloids. REASON : The size of colloidal particles are larger than the size of suspension particles.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

8. ASSERTION : The conductivity depends on the charge and size of the ions in which they dissociate, the concentration of ions or ease with which the ions move under potential gradient. REASON : The conductivity of solutions of different electrolytes in the same solvent and at a given temperature is same.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

9. ASSERTION : Conductivity of silicon increases by doping it with group-15 elements. REASON : Doping means introduction of small amount of impurities like P, As or Bi into the pure crystal.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

10. ASSERTION : Oxidation of 1-nitronaphthalene gives o-nitrophthalic acid whereas 1-aminonaphthalene on oxidation gives phthalic acid. REASON : An amino group attached to the benzene ring makes it resistant to oxidation whereas nitro group makes the benzene ring susceptible to oxidation.

a) Both ASSERTION and REASON Are True and REASON Is the Correct Explanation of ASSERTION

b) Both ASSERTION and REASON Are True but REASON Is Not the Correct Explanation of ASSERTION

c) ASSERTION Is True but REASON Is False

d) Both ASSERTION and REASON are False.

Correct! Wrong!

CHEMISTRY DAY-10

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