Physics-
General
Easy

Question

Assertion :We cannot produce a real image by plane or convex mirrors under any circumstances
Reason : The focal length of a convex mirror is always taken as positive

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

The correct answer is: If assertion is false but reason is true

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An organic compound  reacts with P C l subscript 5 to give. The compound  with sodium metal gives n minus b u tan e. space T h u s comma space A space a n d space B space a r e colon

An organic compound  reacts with P C l subscript 5 to give. The compound  with sodium metal gives n minus b u tan e. space T h u s comma space A space a n d space B space a r e colon

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If f : R → R is continuous and differentiable function such that not stretchy integral subscript negative 1 end subscript superscript x end superscript blankf(t) dt + f¢¢¢ (3) not stretchy integral subscript x end subscript superscript 0 end superscript d t equals not stretchy integral subscript 1 end subscript superscript x end superscript blankt3
dt – f ¢ (1) not stretchy integral subscript 0 end subscript superscript x end superscript blankt2 dt + f ¢¢ (2) not stretchy integral subscript x end subscript superscript 3 end superscript blankt. dt, then the value of f ¢ (4) is :

If f : R → R is continuous and differentiable function such that not stretchy integral subscript negative 1 end subscript superscript x end superscript blankf(t) dt + f¢¢¢ (3) not stretchy integral subscript x end subscript superscript 0 end superscript d t equals not stretchy integral subscript 1 end subscript superscript x end superscript blankt3
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Assertion : The refractive index of diamond is square root of 6 and that of liquid is square root of 3
If the light travels from diamond to the liquid, it will totally reflected when the angle of incidence is 30o
Reason :mu equals fraction numerator 1 over denominator sin invisible function application C end fraction where mu is the refractive index of diamond with respect to liquid

Assertion : The refractive index of diamond is square root of 6 and that of liquid is square root of 3
If the light travels from diamond to the liquid, it will totally reflected when the angle of incidence is 30o
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If f : [0, p] → R is continuous and not stretchy integral subscript 0 end subscript superscript pi end superscript blankf(x) sin x dx = not stretchy integral subscript 0 end subscript superscript pi end superscript blankf(x) cos x dx = 0, then the number of roots of f(x) in (0, p) is

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Assertion : Different colours travel with different speed in vacuum
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Assertion : Different colours travel with different speed in vacuum
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The following substance can be used as a raw material for obtaining alcohol:

The following substance can be used as a raw material for obtaining alcohol:

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Etherates are

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Lucas reagent produces cloudiness immediately with:

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 The product  is

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Alloys of which metal are light and strong and are used in the manufacture of aeroplane parts?

Alloys of which metal are light and strong and are used in the manufacture of aeroplane parts?

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The right order of the solubility of sulphates of alkaline earth metals in water is

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Which pair of the following chlorides do not impart colour to the flame?

Which pair of the following chlorides do not impart colour to the flame?

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