Assertion: A normal human eye can clearly see all the objects beyond a certain minimum distance. 
Reason: The human eye has the capacity to suitably adjust the focal length of its lens to a certain extent.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false

Subtopic:  Human Eye |
 67%
Please attempt this question first.
Hints

Assertion: A satellite moving in a circular orbit around the earth has a total energy E0, then its potential energy is –E0
Reason: Potential energy of the body at a point in a gravitational field of orbit is .

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Satellite |
 57%
Please attempt this question first.
Hints

Assertion: If a liquid in a vessel is stirred and left to itself, the motion disappear after few minutes. 
Reason: The moving liquid exerts equal and opposite force.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Viscosity |
Please attempt this question first.
Hints

advertisementadvertisement

Assertion: At the centre of earth a body has centre of mass, but no centre of gravity. 
Reason: This is because g=0 at the centre of earth.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Acceleration due to Gravity |
 68%
Please attempt this question first.
Hints

Aspirin acts as an analgesic because it
 

1.  inhibits the synthesis of prostaglandins which stimulates inflammation of the tissue
2.  prevents the release of HCl in the stomach
3.  prevents the interaction of histamine with its receptor
4.  inhibit activities of enzymes

 62%
Please attempt this question first.
Hints

Starch is a mixture of two components, a water soluble component amylose (15-20%) and a water insoluble component amylopectin (80-85%). The aqueous solution of amylase gives a blue colour with iodine solution due to the formation of
 

1.  amylase iodide
2.  amylase iodate
3.  inclusion complex
4.  amylase tetraiodide complex

Please attempt this question first.
Hints

advertisementadvertisement

Aldol condensation between which of the following two compounds followed by dehydration gives methyl vinyl ketone?
 
1.  Formaldehyde and acetone
2.  Formaldehyde and acetaldehyde
3.  Two molecules of acetone
4.  Two molecules of acetaldehyde

 

 55%
Please attempt this question first.
Hints

Grignard reagent and organolithium compounds react with dry ice separately. Hydrolysis of the products from these two reactions will give:
1. Ketones and carboxylic acids, respectively.
2. Carboxylic acids and ketones, respectively.
3. Only carboxylic acids
4. Only ketones

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

The strongest acid among the following is: 

1.  o-Methoxy phenol
2.  p-Methoxy phenol
3.  m-Methoxy phenol
4.  Phenol
Please attempt this question first.
Hints