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Which of the following are reasons for p...

Which of the following are reasons for population explosion? i) Increased health facilities ii) Rapid increase in MMR iii) Rapid increase in IMR iv) Rapid decrease in IMR v) Decrease in number of people reaching reproducable age

A

i& iv

B

iii & v

C

ii & iv

D

i & v

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A
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Increased IMR and decreased MMR in a population will

Which of the following statements about the modern periodic table are incorrect ? (a) The elements in Modern periodic table are arranged on the basis of their decreasing atomic number. (b) The elements in Modern periodic table are arranged on the basis of their increasing atomic masses. (c) Isotopes are placed in adjoining groups in the periodic table. (d) The elements in the modern periodic table are arranged on the basis of their increasing atomic number.

What happen if a couple give birth to more than two babies? i) Increasing in population, ii) Increasing in income, iii) Increasing in food problems, iv) Increasing in social and economic problems.

Bond Length: Internuclear distance between two adjacent atoms in an species is known as bond length, -Bond length depends on: i) size of the atom involved in the bond formation ii) size of the orbitals involved in the bond formation iii) Lone pair-long pair repulsion iv) Resonance v) s-character of combining orbitals with the increasing size of the atoms and atomic orbitals bond length increases. Lone pair-lone pair repulsion increases bond length (if atoms are small sized) whereas resonance can increase some bond lengths and decrease some other bond length. With increasing s-character bond length decreases, whereas with increasing multiplicity of bonds, bond length decreases. However, in some cases, bond lengths are also affected by relative position of bonds (between two similar atoms). Usually but not always with increasing bond length, bond strength (and hence bond dissociation energy) decreases. In which of the following all bonds are not equivalent?

Bond Length: Internuclear distance between two adjacent atoms in an species is known as bond length, -Bond length depends on: i) size of the atom involved in the bond formation ii) size of the orbitals involved in the bond formation iii) Lone pair-long pair repulsion iv) Resonance v) s-character of combining orbitals with the increasing size of the atoms and atomic orbitals bond length increases. Lone pair-lone pair repulsion increases bond length (if atoms are small sized) whereas resonance can increase some bond lengths and decrease some other bond length. With increasing s-character bond length decreases, whereas with increasing multiplicity of bonds, bond length decreases. However, in some cases, bond lengths are also affected by relative position of bonds (between two similar atoms). Usually but not always with increasing bond length, bond strength (and hence bond dissociation energy) decreases. The correct order of B-F bond length follows the sequence

The instantaneous rate of an elementary chamical reactkon aA+bBhArr cC+dD can be given by rate =K_(f)[A]^(a)[B]^(b)-K_(b)[C]^(c)[D]^(d) where K_(f) and K_(b) are rate constants for forward and backward reactions respectively for the reversible reaction. If the reaction is an irreversible one, the rate is expressed as, rate =K[A]^(a)[B]^(b) where K is rate contant for the given irreversible rate of disappearance of A is a/b times the rate of disappearance of B. The variation of rate constant K with temperature is expressed in terms of Arrhenius equation: K=Ae^(-E_(a)//RT) whereas the ratio (K_(f))/(K_(b)) is expressed in terms of van't Hoff isochore: (K_(f))/(K_(b))=Ae^(-DeltaH//RT) , where E_(a) and DeltaH are energy of activation and heat of reaction respectively. The variation of rate constant K and (K_(f))/(K_(b)) with temperature shows the following effects: For endothrmic reaction when T increases then K increases and (K_(f))/(K_(b)) also increases. (ii) For endothemic reaction when T decreases then K decreases and (K_(f))/(K_(b)) also decreases. (iii) For exothermic when T increases then K and (K_(f))/(K_(b)) both increases. (iv) For exothermic reaction when T decreases then K increases and (K_(f))/(K_(b)) decrease. (v) For exothermic reaction when T increases thenK and (K_(f))/(K_(b)) both decrease.

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AAKASH SERIES-REPRODUCTIVE HEALTH -EXERCISE-I (POPULATION EXPLOSION & BIRTH CONTROL )
  1. Which of the following is correct regarding the consequences of over p...

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  2. Causes for increased population growth in India is/are

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  3. Which of the following are reasons for population explosion? i) Increa...

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  4. Which of the following correctly describes measures that can be used t...

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  5. Indian population crossed one billion mark in

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  6. Growth rate of Indian population according to 2001 census report is

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  7. Vaults prevent conception by

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  8. Which of the following birth control measures can be considered as the...

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  9. Which of the following is a mechanical barrier used in birth control?

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  10. Which of the following IUDs makes the uterus unsuitable for implantati...

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  11. Contraceptive oral pills help in birth control by

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  12. The oral contraceptive saheli for females contains

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  13. Findout the correct statements regarding contraception. 1) Pills ha...

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  14. Find out the non medicated IUD

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  15. Multiload device contains

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  16. Oral contraceptive pills function by

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  17. Progesterone pill helps in preventing pregnancy by not allowing

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  18. Which of the following is a method of birth control?

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  19. Contraceptive oral pill help birth control by

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  20. The most important component of oral contra ceptive pills is

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