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[A] : Life occurs upto 15000 m in the ai...

[A] : Life occurs upto 15000 m in the air on mountains .
[R] : At great heights `CO_(2)` & `O_(2)` concentration is too little & temperature is very low .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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Which of the following factors are favorable for the formation of oxyhemoglobin ? (a) High p_(O_(2)) , low p_(CO_(2)) (b) Lesser H^(+) concentration, lower temperature ( c) Low p_(O_(2)) , high CO_(2) (d) High H^(+) , higher temperature

Which of the following factorss ar favorable for the formation of oxyhemoglobin ? (a) High p_(O_(2)) , low p_(CO_(2)) (b) Lesser H^(+) concentration, lower temperature ( c) Low p_(O_(2)) , high CO_(2) (d) High H^(+) , higher temperature

Which of the following factorss ar favorable for the formation of oxyhemoglobin ? (a) High p_(O_(2)) , low p_(CO_(2)) (b) Lesser H^(+) concentration, lower temperature ( c) Low p_(O_(2)) , high CO_(2) (d) High H^(+) , higher temperature

Which factors are favourable for the formation of oxyhaemoglobin ? (a)High acidity (b)Low P_(CO_(2)) (c) Lesser H^(+) concentration (d) Lower temperature

Consider a class room of dimensions 5 xx 10 xx 3 m^(3) at atemperature 20^(@)C and pressure 1 atm. There are 50 people in the room, each losing energy at an average of 150 watt. Assuming that walls ceiling, floor and furniture are perfectly insulated and none of them absorb heat, what time (in seconds) will be needed for rising the temperature of air in the room to body temperature i.e., 37^(@)C ? (For air C_(P) = (7)/(2)R . Loss of air to outside as the temperature rises may be neglected).

The reaction, CO(g)+3H_(2)(g) hArr CH_(4)(g)+H_(2)O(g) is at equilibrium at 1300 K in a 1 L flask. It also contains 0.30 mol of CO, 0.10 mol of H_(2) and 0.02 mol of H_(2)O and an unknown amount of CH_(4) in the flask. Determine the concentration of CH_(4) in the mixture. The equilibrium constant K_(c ) for the reaction at the given temperature us 3.90 .

For the first order reaction given below select the set having correct statements 2N_(2)O_(5)(g) rarr 4NO_(2)(g) + O_(2)(g) (1) The concentration of the reactant decreases exponentially with time (2) the reaction proceeds to 99.6 % completion in eight half life duration (3) the half life of the reaction depends on the intial concentration of the reactant (4) the half life of the reaction decrease with increasing temperature

The CO in a 20L sample of gas was converted to CO_2 by passing the gas over iodine pentoxide heated to 150^@C : I_2O_5(s)+5CO(g)to5CO_2(g)+I_2(g) The iodine distilled at this temperature and was collected in an absorber containing 10 mL of 0.011 M Na_2S_2O_3 .The excess hypo was back titrated with 5 mL of 0.001 M I_2 solution. What must be the milligrams of Co in 1 L of the original gas sample ?

An object O is kept in air and a lens of focal length 10 cm (in air) is kept at the botton of a container which is filled upto a height 44 cm by water. The refractive index of water is 4//3 and that of glass is 3//2 . The botton of the container is closed by a thin glass slab of refractive index 3//2 . Find the distance (in cm ) of the final image formed by the system from botton of container (refer to figure shown below).

S_(1) : Even at different temperature and pressure, equal volume of all the gases contains equal number of moles. S_(2) : 11.2 L CO_(2)(g) at STP contains the same number of free entity as 22.4 L O_(2)(g) at STP . S_(3) : If reacting species in a reaction are not taken in their stoichiometric coefficient ratio then one of the reactant will be limiting reagent. S_(4) : If two different solutions having different solute are mixed in certain volume proportion then resulting concentration of the components will decrease.

TRUEMEN BIOLOGY ENGLISH-Ecology -ASSERTION AND REASON
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  2. [A] : Leaf butterfly & stick insect show mimicry to dodge their enemi...

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  3. [A] : In a food chain , membrane of successive higher levels are fewer...

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  4. Assertion (A) : Methane component of greenhouse gases contributing to ...

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  5. Assertion: Suspended particulate matter(SPM) is an important pollutant...

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  6. Assertion : Age sex structure of human population in countries like Fr...

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  7. Assertion (A) : Presently, the global atmosphere is warming up. Reas...

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  8. [A] : Ozone depletion at the south pole will threats world's fisheries...

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  9. [A] : Inquilines can not survive without human care . [R] : Cultige...

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  10. [A] : Problems of ecological environment arise from over population....

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  11. [A] : Social forestry programme is grows trees for fuel , fodder & fru...

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  12. [A] : Cultigens (domesticated animals & cultivated plants ) are not in...

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  13. [A] : Population density of indicator organisms show degree of water p...

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  14. [A] : Traffic Jams cause giddiness , reduced vision , exhaustion etc ....

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  15. [A] : Thermal pollution is harmful to fishes . [R] : Heating cause...

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  16. [A] : Stratosphere is an excellent region for air travel . [R] : Be...

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  17. [A] : Using dung as fuel greatly reduces grain production . [R] : Du...

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  18. Assertion : Lichens are a pioneer community in the temperate region. ...

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  19. Assertion: Global water cycle does not involve the living organisms. ...

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  20. [A] : Life occurs upto 15000 m in the air on mountains . [R] : At gr...

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