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Select the INCORRECT statement.

ASunlight keeps the house free from germs.
BWe should regularly do dusting of our house.
CThe drains of kitchen and bathroom should be well covered to keep away insects such as cockroaches.
DWe should not put wire netting on the windows as it obstructs the air entering our house.

Read the given paragraph where few words have been italicised.
The gall bladder secretes bile juice which is stored in the liver. Bile breaks down fats into tiny droplets that can be digested and absorbed more easily. The digestive juices then act on these tiny droplets to form simpler compounds known as amino acids and glycerol.
Select the incorrect statement regarding this.

A The positions of gall bladder and liver should be interchanged.
B Amino acids should be replaced with fatty acids.
C Fats should be replaced with starch.
D Glycerol should not be replaced as it is correctly mentioned.

A simple machine

AMagnifies the movement only
BEnables us to do more work by effort
CChanges the direction of force in all circumstances
DNone of these.

Select the option containing only divalent anions from the following.

A Sulphide, Nitride
B Carbonate, Sulphite
C Phosphate, Nitrate
D Oxide, Chloride

A wire is wound around an iron bar and connected to a battery as shown in the given figure.

Which one of the following statements best represents the polarity of X, Y and Z?

A Points X and Y are North poles.
B Points X, Y and Z are North poles.
C Point X is North pole and point Z is South pole.
D Points X and Z are North poles.

Look at the banana plant shown in the given picture.
Why is it called a herb not a tree?


A It does not have a thick woody trunk.
B It does not produce flowers.
C It has a woody trunk.
D It has weak stem which cannot stand upright on its own.

Read the given passage where some of the words have been italicised. Identify the incorrect italicised words and select the incorrect statement.
Troposphere is the first layer of atmosphere above Earth. Mesosphere is an important layer as this has ozone layer that absorbs harmful ultraviolet rays of the Sun and protect us from its harmful effect. Stratosphere layer prevent asteroids from reaching the Earth’s surface. Exosphere is the layer where satellites and space shuttles orbit.

ATroposphere should not be changed as it is correctly mentioned.
BMesosphere and stratosphere should be interchanged.
CExosphere should be changed to thermosphere.
DAsteroids should be changed to planets.

The given figure shows the heating curve of a substance.

Straight parts ab and cd of the curve show that

ANo heating is done during this period.
BHeat energy is used to overcome the forces of attraction between the particles.
CThermometer showed some error during this period.
DEnergy of particles of the substance is zero during this period.

What is the function of R and S?

Which of the following organism live in freshwater habitats?

AGold fish, water lilies and frogs
BHydrilla, whales, sharks and seal
CSea weeds, water lily and sea turtles
DHydrilla, oysters and blue whale