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Intrinsic semiconductors are a pure form of semiconductors. Extrinsic semiconductors are obtained when an impurity is added to an intrinsic semiconductor.
Both are active, but O is more active w.r.t. N due to its high electronegativity[ En(O) = 3.5 & En(N) = 3.0 ]. Hence, N is more stable w.r.t. O
You just finished Kinematics
What is a cell?
Cell is structural and functional unit of life
E=CV2
where
V=Ed
Substitute the value of C and V in the first equation
When both arms are parallel.
A projectile is thrown at an angle with vertical .It reaches a maximum height H . The time taken to reach the highest point of its path is
Equation of trajectory of a projectile is given by where x and y are in metres and x is along horizontal and y is vertically upward and particles is projected from origin .Then which of the following option is incorrect
A.
Initial velocity of particle is
B.
horizontal range is 10 m
C.
Maximum range is 10 m
D.
Angle of projection with horizontal is
A person A is moving along east and B is moving along north. Then relative velocity of A with respect to B is
A ball is thrown vertically upward with a velocity of 20 ms-1 from a top of a multistory building.The hight of the point from where the ball is thrown is 25 m from the ground. The hight to which the ball rises from the ground and time taken before the ball hits the ground are (g:=10 ms-2)
Pinus seed cannot germinate and establish without fungal associaton. This is because:
- Option 1)
its embryo is immature
- Option 2)
it has obligate association with mycorrhizae
- Option 3)
it has a very hard seed coat
- Option 4)
its seed contain inhibitors that prevents germinatiom.
Pinus plant is devoid of root hair. So it has difficulty in absorbing water from the soil. A seed can only germinate after absorbing adequate amount of water. Hence, by the symbiotic association with fungi, pinus seed can germinate and grow. So the answer is option 2
In which case change in entropy is negative?
- Option 1)
Evapouration of water
- Option 2)
Expansion of a gas at constant temperature
- Option 3)
Sublimation of solid to gas
- Option 4)
Drug called 'Heroin' is synthesized by:
- Option 1)
methylation of morphine
- Option 2)
acetylation of morphine
- Option 3)
glycosylation of morphine
- Option 4)
nitration of morphine
Which of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?
- Option 1)
BOD incubator
- Option 2)
sludge digestor
- Option 3)
Industrial oven
- Option 4)
Bioreactor
Which of the following muscular disorder is inherited?
- Option 1)
Tetany
- Option 2)
Muscular dystrophy
- Option 3)
Myasthenia gravis
- Option 4)
Botulism
G jk hbvffvbbvhvhdsa by yu bg ds. By h juju fdg. M.l. n. Df 754iivf. Bbm..
Match the following:
(a) Pure Nitrogen (i) Chlorine
(b) Haber process (ii) Sulphuric Acid
(c) Contact process (iii) Ammonia
(d) Deacon's process (iv) Sodium azide or Barium Azide
Which of the following is the correct option?
(a) (b) (c) (d)
- Option 1)
(i) (ii) (iii) (iv)
- Option 2)
(ii) (iv) (i) (iii)
- Option 3)
(iii) (iv) (ii) (i)
- Option 4)
(iv) (iii) (ii) (i)
The mixture that forms maximum boiling azeotrope is:
- Option 1)
Water + Nitric Acid
- Option 2)
Ethanol + Water
- Option 3)
Acetone + Carbon disulphide
- Option 4)
Heptane + Octane
Among the following, the one that is not a greenhouse gas is:
- Option 1)
nitrous oxide
- Option 2)
methane
- Option 3)
ozone
- Option 4)
sulphur dioxide
The correct structure of tribromooctaoxide is:
- Option 1)
- Option 2)
- Option 3)
- Option 4)
option 1 ,because it is not an ion
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