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# Basic Science

10th Class - CBSE - General Knowledge - 9798 Questions - 0 Concepts

#### Important Questions

Q1 Single Correct Hard
If by an unknown accident the acid-secreting cells of the stomach wall of an individual are damaged, digestion of which one of the following biomolecules will be affected to a greater extent?
• A. Protein only
• B. Lipid
• C. Carbohydrate only
• D. Protein and Carbohydrate

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Q2 Assertion & Reason Hard
##### ASSERTION

When a block body is thrown in a furnace, initially it is darkest and finally it is brightest.

##### REASON

The emissivity as well as absorptive power of block body is 1.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect and Reason is correct

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Q3 Single Correct Hard
When a simple pendulum is taken to the moon from the earth, its time period
• A. Increases
• B. Decreases
• C. Remains the same
• D. None of the above

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Q4 Single Correct Hard
$CCl_3\! \! -\! \! CH=O$ reacts with chlorobenzene in presence of sulphuric acid & produces :

• A.
• B.
• C.
• D.

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Q5 Single Correct Hard
In which of the following option, second compound gives a precipitate more rapidly then the first compound when reacted with $AgNO_3$ in ethanol.

• A.
• B.
• C.
• D. $Ph\! \! -\! \! CH_2\! \! -\! \! Br \: or\: CH_2=CH\! \! -\! \! CH_2\! \! -\! \! Br$

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Q6 Multiple Correct Hard
Out of the following which reactions give polar product :

• A. $CH_3 - C\equiv C - CH_3\xrightarrow[Quinoline]{H_2 /pd/C}$
• B. $C_2H_5 - C\equiv C - C_2H_5\xrightarrow[]{Na /NH_3(\ell)}$
• C. $CH_3 - C\equiv C - C_2H_5\xrightarrow[]{Na /NH_3(\ell)}$
• D.

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Q7 Assertion & Reason Hard
##### ASSERTION

Compound II is more reactive towards nucleophilic addition reaction.

##### REASON

Statement - 2 : Cyclic ketones are more reactive than acyclic ketone due to less steric hindreance and compact structures of cyclic ketone.

• A. Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.
• B. Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1
• C. Statement-1 is True, Statement-2 is False
• D. Statement-1 is False, Statement-2 is True

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Q8 Multiple Correct Hard
Choose the correct options :

• A. Compound $CH_3(CH_2)NH_2$ react with KOH and $CHCl_3$ produces bad smell.
• B. $CH_3 - C\equiv C- H$ gives white ppt. with ammonical $AgNO_3$.
• C. $CH_3 - CH (OH) CH_3$ react with Lucas reagent and cloudiness appears after 30 minutes.
• D. $CH_3 - CH_2 - COOCH_3$ gives alkaline hydrolysis.

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Q9 Single Correct Hard
$S_1$: Addition of inert gas to the equilibrium mixture at constant volume, does not alter the equilibrium.
$S_2$: Equilibrium $H_2(g) + I_2 (g)\rightleftharpoons 2HI(g)\: is\: established\: in\: V(L)$. If complete equilibrium mixture is transfered to 2V(L) container then the partial pressure of HI will remain same in the new container.
$S_3$ : Formation of diamond is favourable at very high temperature and very high pressure.

• A. TFF
• B. TFT
• C. FTT
• D. FFT

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Q10 Multiple Correct Hard
Choose the correct options :

• A. The number of ether metamers of $C_4H_{10}O$ is three.
• B. Sec. butyl alcohol has a one chiral atom.
• C. Geometrical isomerism results because the molecule has two dissimilar groups attached to both ends of double bond
• D.

Asked in: General Knowledge - Basic Science

1 Verified Answer | Published on 24th 10, 2020

Questions 122475
Subjects 10
Chapters 93
Enrolled Students 65