A dual organism composed of symbiotic association of an alga living within a fungus myceliium is
1.Mycorrhiza
2.Rhizobium
3.Lichen
4.Legume
A limiting reactant is one which
1.is taken in lesser quantity in grams as compared to other reactants
2.is taken in lesser quantity in volume as compared to other reactants
3.gives the maximum amount of the product which is required
4.gives the minimum amount of the product under consideration
A method of separation of components from its solution using Distribution law is
1.Sublimation
2.Crystallisation
3.Solvent extraction
4.Distillation
A real gas obeying vander waals equation will resemble the ideal gas if
1.Both a and b are small
2.Both a and b are large
3.a is small and b is large
4.a is large and b is small
A safe and more reliable method for drying the crystal is
1.Hot air currents
2.folds of filter paper
3.oven
4.Vacuum desiccator
Abiotic components include
1.Atmosphere
2.Hydrosphere
3.Lithosphere
4.All of these
Atomic radius can be determined by
1.X - ray diffraction
2.Spectrophotometer
3.Optical microscope
4.Electron microscope
Bohrs model is contradicted by
1.Plancks theory
2.Dual nature of matter
3.Heisenbergs uncertainty principle
4.All of these
Disease in living organisms caused by parasites is called
1.Parasitism
2.Infestation
3.Predation
4.Infection
Diverse and stable community at the end of succession is
1.Climax community
2.Pioneers community
3.Top community
4.Stable community
Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is
1.one / seventeen
2.sixteen / seventeen
3.one / three
4.two / three
Gross primary production is
1.Amount of energy fixed by small plants
2.Amount of energy fixed by large plants
3.Total amount of energy fixed by all plants
4.Primary production minus respiratory loss
Hydrosere is
1.Secondary succession starting in a pond
2.Primary succession starting in a pond
3.Primary succession starting on a dry soil
4.All of these
Isotopes differs in
1.arrangement of electrons in orbitals
2.position in the periodic table
3.properties depend upon mass
4.chemical properties
Legume plants are the hosts to
1.Rhizobium
2.Mycorrhiza
3.Lichen
4.Algae
Lichen and algae form
1.Climax community
2.Pioneers community
3.Initiator community
4.Seral community
Mosses are
1.Dermatocarpon
2.Permellia
3.Tortula
4.Both b and c
Nitrogen constitutes about ______ % of atmosphere
1.58%
2.25%
3.10%
4.78%
Only London dispersion forces are present among the
1.Molecules of water in liquid state
2.Atoms of helium in gaseous state at high temperature
3.Molecules of hydrogen chloride gas
4.Molecules of solid iodine
Over grazing leads to
1.Good pastured lands
2.Rocky areas
3.Totally barren lands
4.Salinity
Oxidation of ammonia or ammonium ions by bacteria in soil is called
1.Nitrification
2.Ammonification
3.Assimilation
4.Denitrification
Plant biomass is
1.Gross primary production
2.Net primary production
3.Gross primary production minus respiratory loss
4.Both b and c
Plants growing in xeric conditions are called
1.Spherophytes
2.Mesophytes
3.Xerophytes
4.Teridophytes
Plasma is used in
1.Fluorescent bulb
2.Neon signs
3.Lasers
4.All of these
Quantum number values for 3p orbitals are
1.n=3 l=2
2.n=3 l=0
3.n=3 l=1
4.n=3 l=3
Secondary succession starts from
1.A bar rock sand
2.Clear glacial pool
3.From remains of previous ecosystem
4.Fire
Sequence of changes in community and its non-living environment over a period of time is
1.Niche
2.Succession
3.Alterations
4.Neo-ecology
Sharks may have small fish attached to them called
1.Rumors
2.Romas
3.Romosis
4.Remoras
Symbiosis relationship in which only one organism is benefited is
1.Symbiosis
2.Commensalism
3.Mutualism
4.Unism
The major unit of ecology is
1.Population
2.Community
3.Ecosystem
4.Biome
The mass of one mole of electron is
1.1.008
2.0.55
3.0.184
4.1.637
The molecules of CO2 in dry ice form
1.Ionic crystal
2.Covalent crystal
3.Molecular crystal
4.Any type of crystal
The number of atoms in a molecule determines
1.macromolecule
2.macromolecule
3.molecularity
4.atomicity
The type of filtering media used for filtration depending upon
1.Nature of reactants
2.Nature of crucible
3.Nature of product
4.Nature of precipitate
The volume occupied by 1.4g CO at S.T.P is
1.22.4 dm3
2.2.24 dm3
3.1.12 cm3
4.1.12 dm3
Total solar energy trapped by the producers in an ecosystem is
1.95%
2.20%
3.78%
4.1%
Water absorber used in combustion analysis is
1.50% KOH
2.Lime water
3.CaCl2
4.Mg (CIO4)2
Water absorber used in combustion analysis is
1.Ecology
2.Synecology
3.Autecology
4.Niche
When fast neutron strike the nucleus of nitrogen the particles ejected are
1.? - particles
2.? - particles
3.? - rays
4.X - rays
Which element has same isotopes like palladium
1.Nickel
2.Calcium
3.Cadmium
4.Tin
Which of the following is not true for food web?
1.Formed from food chain
2.Complex than food chain
3.Stable than food chain
4.Starts with primary consumers
Which of the following is pseudo solid
1.CaF2
2.NaCl
3.Glass
4.Diamond
Which of the following set has all species isoelectronic
1.F - Cl - Br
2.Li+1 - Na+1 - K+1
3.F - Ne - Na+
4.H+ - H- - H
Which of the following step of nitrogen cycle is not useful for plants
1.Ammonification
2.Nitrification
3.Denitrification
4.Both a and c
Which one of the following is more tolerant to herbivore
1.Grasses
2.Trees
3.Herbs
4.None of these
Which specie has unpaired electrons in antibonding molecular orbitals
1.O2+2
2.N2-2
3.B2
4.O2-2
Which statement is true?
1.Producers are heterotrophic organisms
2.Consumers are autotrophic organisms
3.Fungi and bacteria are decomposers
4.Consumers release chemical elements as ions
Wood forests form the
1.Pioneers community
2.Climax community
3.Top community
4.Transient community