List of practice Questions

Woolen clothes keep the body warm in winter. Air is a bad conductor of heat.
The two cotyledons in the seed are often referred to as the embryonic leaves. The embryo contains radicle and plumule.
The megaspore mother cell undergoes mitosis to produce four megaspores. Megaspore mother cells and the megaspores are both haploid.
The collenchyma is a thick walled living tissue. The collenchyma is thickened due to the deposition of pectin.
Systematics is the branch of biology that deals with classification of living organism. The aim of classification is to group the organisms in an orderly manner.
Stress is the internal force per unit area of a body. Rubber is more elastic than steel.
S.I. units are logical and coherent. S.I. system of units is a rationalised system.
Potassium and caesium are used in photoelectric cells. Potassium and caesium emit electrons on exposure to light.
Physical absorption of molecules takes place on surface only In this process, the bonds of the absorbed molecules are broken.
Phenol is a weaker acid than ethanol. Groups with $+M$ effect and $-I$ effect decrease acidity at $m$-position.
Lateral line system is found in fishes and aquatic larval amphibians. Lateral line system has receptors which are the clusters of sensory cells derived from ectoderm.
In an elastic collision of two billiard balls, the total kinetic energy is conserved during the short time of oscillation of the balls (i.e. when they are in contact). Energy spent against friction does not follow the law of conservation of energy.
During an adiabatic process, heat energy is not exchanged between system and its surroundings. The temperature of a gas increases when it undergoes an adiabatic expansion.
Diamond is a bad conductor. Graphite is a good conductor.
Cuprous ion $(Cu^+ )$ is colourless whereas cupric ion $(Cu^{++} )$ is blue in the aqueous solution. Cuprous ion $(Cu^+ )$ has unpaired electrons while cupric ion $(Cu^{++} )$ does not.
Clones are a group of organisms of identical genotype, produced by a single parent through asexual means. Clones exhibit high genetic variations.
Absorption spectrum consists of some bright lines separated by dark spaces. Emission spectrum consists of dark lines.
The correct order of solubility in water for $He, Ne, Ar, Kr, Xe$ is
Spectrum of $Li^{2+}$ is similar to that of
If $P$ is pressure and $\rho$ is density of a gas, then $P$ and $\rho$ are related as
The intermediate formed in aldol condensation is
The compound most suitable for the preparation of cyanohydrin is
Absolute values of internal energy of substances can not be determined. It is impossible to determine exact values of constituent energies of the substances.
If a homozygous red-flowered plant is crossed with a homozygous white-flowered plant, the offsprings will be
An astronomical telescope has a large aperture to :