Match List-l with List-ll

List-l (Aspect)	List-II (Explanation)
(A) Productivity	(I) Photosynthetically active radiation
(B) Nutrient Cycling	(II) Breakdown of organic matter
(C) Energy Flow	(III) Rate of biomass production
(D) Decomposition	(IV) Sedimentary

Choose the correct answer from the options given below:

In which ecosystem, a larger fraction of energy flows through detritus food chain (DFC) than through grazing food chain (GFC)?

A nucleoside comprises:

Which of the following is NOT a copper releasing IUDs?

Where are IUDs placed in the human female reproductive sytem for contraception?

Which one of the following is a correct statement about dormancy?

Which of the following statements are correct about the structure of a sperm?
A. It is composed of head, thorax, neck and tail
B. The neck region contains a lot of mitochondria
C. The mitochondria produces energy for the movement of tail
D. The tail facilitate sperm motility essential for fertilisation
Choose the most appropriate answer from the options given below:

Arrange the following compounds towards increasing \(S_{N}2\) reaction?
(A) n-Butyl bromide
(B) Isobutyl bromide
(C) Tertiary butyl bromide
(D) Sec-Butyl bromide
Choose the correct answer from the options given below:

If \(\frac{1}{x^2}-\frac{1}{x}\) > 0, then \(x\) lies in the interval

The correct statements for the activation energy of a reaction are:
(A) Activation energy is the energy difference between the activated complex and the total energy of the reactants.
(B) Higher is the activation energy, the faster is the rate of reaction.
(C) Catalyst increases the rate of the reaction by following the path of lower activation energy.
(D) In the Arrhenius equation, \(E_a\) corresponds to the activation energy
Choose the correct answer from the options given below :

Question based on the following passage :
P-Block elements are placed in group 13 to 18 in the periodic table. Group 15 is nitrogen family.
Nitrogen can react with hydrogen, oxygen, halogens etc. It shows multiple oxidation states in its various oxides i.e. \(N_2O, N_2O_3, N_2O_5\) etc. Important allotropic forms of phosphorus are white, red and black phosporus. Various compounds of phosphorus are phosphine, \(PCl_3, PCl_5\) and oxoacids of phosphorus. Oxidation states \(+1\) to \(+5\) are seen in various oxoacids of phosphorus. Group 17 elements are collectively known as halogens. Bond dissociation enthalpy of \(F_2\) is smaller than \(Cl_2\).
The gases present in group 18 are chemically unreactive, they form only few compounds. Neil Bartlett (in 1962) observed the reaction of a noble gas. Since then, many noble gas compounds have been synthesised.
The bond angle in \(PH_3\) is less than \(PH_4^+\) due to :

Androgens are synthesised and secreted by which of the following?

Which one of the followings has the ability to transform normal cells into cancerous cells in animals?