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[A] : Traffic Jams cause giddiness , red...

[A] : Traffic Jams cause giddiness , reduced vision , exhaustion etc .
[R] : Carbon monoxide from vehicles reduces `O_(2)` carrying capacity of haemoglobin .

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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In presence of carbon monoxide, haemoglobin loses its oxygen-carrying capacity causing oxygen starvation of body cells-explain

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[A] : Reduced blood can carry more CO_2 than oxygenated blood. [R]: Blood containing more CO_2 will take up relatively less O_2

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The given reaction is carried out in a closed vessel: CaCO_(3)(s)hArr CaO(s)+CO_(2)(g), DeltaH^(0) gt0 . What would be the effect of the following changes on the equilibrium of the reaction if (1) solid CaCO_(3) is added to the reaction system, (2) some amount of CaO is removed from the reaction system, (3) CO_(2)(g) is introduced into the reaction system at constant volume and temperature., (4) temperature is increased, and (5) volume of the reaction vessel is reduced at constant temperature.

Consider the reaction N_(2)O_(5)(g)rarr4NO_(2)(g)+O_(2)(g) Which was carried out in liquid "CCI"_(4) " at" 48^(@)C . The concentration of N_(2)O_(5) " in CCl" _(4) solution at the start of the reaction was 2.05(M) and it reduced to 1.80 (M) after 170 min . Determine the average rate and the rate of formation of NO_(2) during the given interval.

A bird is sitting on the top of a vertical pole 20 m high and its elevation from a point O on the ground is 45o . It flies off horizontally straight away from the point O. After one second, the elevation of the bird from O is reduced to 30o . Then the speed (in m/s) of the bird is (1) 40(sqrt(2)-1) (2) 40(sqrt(3)-2) (3) 20""sqrt(2) (4) 20(sqrt(3)-1)

In the atmosphere, carbon dioxide is found in two forms, i.e., ^12CO_2 and ^14CO_2 . Plants absord CO_2 during photosynthesis in presence of chlorophyll, plants systhesise glucose 6CO_2 +6 H_2O rarr C_6H_12O_6 + 6O_2uarr Half life of ^14CO_2 is 5760 years. The analysis of wooden artifacts for ^14C and ^12C gives useful information for determination of its age. All living organisms, because of their constant exchange of Carbon dioxide with the surroundings have the same ratio of C-14 to C-12, i.e. 1.3xx10^-12 . When an organism dies, the C-14 in it keeps on decaying as follows: 6^14Crarr7^14N+(-1)^0e +Energy Thus, the ratio of C-14 and C-12 decreases with the passage of time. We can measure the proportion of C-14 in the remains of dead organism and determine how long ago it died. The method of carbon dating can be used to date anything made or organic matter, e.g., bone, skeleton, wood, etc. Using carbon dating, materials have been dated to about 50,000 years with accuracy. A piece of wood from an archeological source shows a C-14 activity which is 60% of the activity found in fresh wood today. The age of archeological sample will be:

Explain why H_(2)O_(2) cannot liberate CO_(2) by reducing carbonate or bicarbonate salts.

TRUEMAN BIOLOGY-Ecology -ASSERTION AND REASON
  1. Assertion (A) : Tropical rain forests are disappearing fast from devel...

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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 , member of successive higher levels are fewer i...

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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. Read the given statement and select the correct option. Statement 1:...

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

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