10 Question MCQ (including Assertion)

Question 1 of 10

When you add a few drops of acetic acid to a test-tube containing sodium bicarbonate powder, which one of the following is your observation?

A No reaction takes place. B A colourless gas with pungent smell is released with brisk effervescence. C A brown coloured gas is released with brisk effervescence. D Formation of bubbles of a colorless and odorless gas.

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Question 2 of 10

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that:

A the food is not cooked completely. B the fuel is not burning completely. C the fuel is wet. D the fuel is burning completely.

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Question 3 of 10

Assertion: Following are the structural isomers of butane.
Reason: Structural isomers have the same molecular formula but they differ in their structures.

A Both A and R are true, and R is the correct explanation of A. B Both A and R are true, but R is not the correct explanation of A. C A is true, but R is false. D A is false, but R is true.

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Question 4 of 10

Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of

A Addition reaction B Substitution reaction C Displacement reaction D Oxidation reaction

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Question 5 of 10

While studying the saponification reaction, what do you observe when you mix an equal amount of colourless vegetable oil and 20\% aqueous solution of NaOH in a beaker?

A The colour of the mixture has become dark brown B A brisk effervescence is taking place in the beaker C The outer surface of the beaker has become hot D The outer surface of the beaker has become cold

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Question 6 of 10

Which of the following is not observed in a homologous series? Give reason for your choice.

A Change in chemical properties B Difference in -CH 2 and 14 u molecular mass C Gradation in physical properties D Same functional group

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Question 7 of 10

Butanone is a four-carbon compound with the functional group

A carboxylic acid. B aldehyde. C ketone. D alcohol.

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Question 8 of 10

Ethane, with the molecular formula \(\mathrm{C}_2 \mathrm{H}_6\) has

A 6 covalent bonds. B 7 covalent bonds. C 8 covalent bonds. D 9 covalent bonds.

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Question 9 of 10

In the soap micelles

A the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster. B ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster. C both ionic end and carbon chain are in the interior of the cluster. D both ionic end and carbon chain are on the exterior of the cluster.

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Question 10 of 10

Assertion (A): Following are the members of a homologous series: \(\mathrm{CH}_3\) \(\mathrm{OH}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH}\)
Reason (R): A series of compounds with same functional group but differing by \(-\mathbf{C H}_{\mathbf{2}}-\) unit is called a homologous series.

A Both A and R are true, and R is the correct explanation of A. B Both A and R are true, but R is not the correct explanation of A. C A is true, but R is false. D A is false, but R is true.

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10 Question MCQ (including Assertion)