Lactobacillus is a:
A)
bacteria
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B)
virus
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C)
fungi
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D)
algae
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E)
None of these
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The cutting and gathering of matured food crop is called:
A)
weeding
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B)
harvesting
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C)
irrigation
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D)
sowing
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E)
None of these
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Which one of the following is a group of metalloids?
A)
Silicon, germanium, arsenic, tellurium
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B)
Boron, neon, iodine germanium
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C)
Silicon, arsenic, argon, krypton
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D)
Tellurium, arsenic, fluorine, krypton
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E)
None of these
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What does our body produce to fight the invader when a disease carrying microbe enters our boy?
A)
Antigens
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B)
Antibody
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C)
Antibiotics
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D)
Pathogens
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E)
None of these
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Which one of the following is the first step towards the cultivation of crop?
A)
Irrigation
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B)
Sowing
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C)
Preparation of soil
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D)
Weeding
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E)
None of these
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PET is the abbreviation of synthetic polymer called:
A)
Polyester and terylene
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B)
Poly ethene terylene
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C)
Poly ethylene terephthalate
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D)
Polyester ethane terylene
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E)
None of these
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Iron can displace ______ from its salt solution.
A)
zinc
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B)
potassium
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C)
sodium
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D)
copper
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E)
None of these
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What do you mean by coal?
A)
A black non-combustible stone consists of only carbon
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B)
A tough and porous black solid substance consists of mainly hydrocarbons
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C)
A thick black liquid having an unpleasant smell
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D)
A hard, black combustible mineral mainly consists of carbon
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E)
None of these
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Who of the following is correct? Ram: Bakelite is a very hard and tough plastic. Raman: PVC is used for making insulation for electric wires. Rajesh: Melamine is a fire-resistant plastic.
A)
Ram and Raman
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B)
Raman and Rajesh
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C)
Ram and Rajesh
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D)
All of them
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E)
None of these
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Which one of the following carbon compound is present in coal tar?
A)
Benzene
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B)
Toluene
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C)
Naphthalene
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D)
All of these
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E)
None of these
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A group of population which is capable of interbreeding is known as:
A)
Flora
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B)
Phylum
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C)
Species
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D)
Kingdom
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E)
None of these
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Caspian tiger is a/an:
A)
Endangered species
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B)
Critically endangered species
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C)
Extinct species
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D)
Endemic species
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E)
None of these
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Internal fertilization occurs:
A)
inside female body
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B)
outside female body
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C)
inside male body
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D)
outside male body
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E)
None of these
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Body of which of the following living organisms is made of cells?
A)
Hydra
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B)
Ant
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C)
Plant
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D)
All of these
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E)
None of these
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Which poisonous gas is formed as a result of incomplete combustion of hydrocarbon fuel?
A)
Coal gas
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B)
Carbon monoxide
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C)
Carbon dioxide
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D)
Nitrogen oxide
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E)
None of these
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Which one of the following statements is correct about combustion?
A)
Combustion is a chemical process in which a substance burns in air to produce heat and light
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B)
Burning of a magnesium ribbon is an ex- ample of combustion
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C)
Oxygen is necessary for combustion to take place
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D)
All of these
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E)
None of these
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Which one of the following types of cell has been shown below?
A)
Skin cell
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B)
Bone cell
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C)
Muscle cell
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D)
Nerve cell
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E)
None of these
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Which one of the following statements about the biosphere reserve is incorrect?
A)
Biosphere reserves help to maintain the biodiversity of the area
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B)
Biosphere reserves help in the commercial exploitation of the area
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C)
Biosphere reserves help to maintain the lifestyle of the tribal people living in the area
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D)
Biosphere reserves preserve the natural ecological condition in the area
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E)
None of these
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Which letter represents the fallopian tube in the figure given below?
A)
L
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B)
M
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C)
N
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D)
O
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E)
None of these
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Which one of the following changes does not occur in boys during puberty?
A)
Growth of hair on the face in the form of moustache and beard
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B)
Deepening of voices
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C)
Testes start to make sperms
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D)
Rapid increase in height
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E)
None of these
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What are greenhouse gases?
A)
The gases which appears greenish in sunlight
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B)
The gases which are present in stratosphere of the earth
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C)
The gases which prevent ultraviolet ray to reach the surface of the earth
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D)
The gases that contribute to the green- house effect by absorbing infrared radiation
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E)
None of these
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P, Q, R and S are four imaginary points in a sea lie 10 m, 20 m, 30 m, and 50 m below the sea-surface respectively. At what point in the sea the pressure will be maximum?
A)
Point P
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B)
Point Q
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C)
Point R
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D)
Point S
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E)
None of these
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A boy runs his toy car on dry marble floor, wet marble floor, newspaper and a towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be:
A)
Wet marble floor, dry marble floor, news- paper, towel
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B)
Newspaper, towel, dry marble floor, wet marble floor
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C)
Towel, newspaper, dry marble floor, wet marble floor
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D)
Dry marble floor, wet marble floor, towel, newspaper
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E)
None of these
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Growth hormone is secreted by which one of the following glands?
A)
Pituitary gland
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B)
Thyroid gland
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C)
Pancreas
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D)
Adrenal gland
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E)
None of these
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The force involved in falling an apple from tree is:
A)
Magnetic force
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B)
Electrostatic force
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C)
Contact force
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D)
Gravitational force
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E)
None of these
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Which type of friction comes into play when a book kept on cylindrical pencil is moved by pushing?
A)
Static friction
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B)
Rolling friction
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C)
Sliding friction
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D)
All of these
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E)
None of these
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To and fro or back and forth motion of an object is termed as:
A)
frequency
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B)
time period
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C)
vibration
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D)
amplitude
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E)
None of these
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A block is sliding on a horizontal surface. The friction can be increased by:
A)
decreasing the mass of the block
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B)
decreasing the area of contact with surface
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C)
by polishing the surface
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D)
by putting some weight on the block
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E)
None of these
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Which one of the following parts of eye controls the amount of light entering the eye by adjusting the size of pupil?
A)
Cornea
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B)
Eye lens
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C)
Iris
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D)
Retina
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E)
None of these
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Which one of the following constellation is also known as 'The Hunter'?
A)
Ursa Major
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B)
Ursa Minor
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C)
Orion
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D)
Cassiopeia
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E)
None of these
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In which one of the following current is not conducted by electrons?
A)
Copper
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B)
Tap water
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C)
Aluminium
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D)
Mercury
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E)
None of these
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Which one of the following cell organelles is present inside the nucleus?
A)
Mitochondria
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B)
Nucleolus
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C)
Golgi body
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D)
Chloroplast
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E)
None of these
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What is the frequency of a vibrating body whose time period is 0.5 second?
A)
5 hertz
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B)
10 hertz
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C)
15 hertz
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D)
20 hertz
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E)
None of these
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We can make distilled water to conduct electricity by:
A)
dissolving some salt into it
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B)
adding little acid into it
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C)
by adding little base into it
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D)
all of these
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E)
None of these
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Which one of the following is the correct measure to protect ourselves from lightening strikes during a thunderstorm?
A)
Taking shelter in open space
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B)
Taking shelter under a tall tree
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C)
Taking shelter in a house
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D)
Taking shelter under an umbrella having metallic handle
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E)
None of these
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Which one of the following statements is correct about the laws of reflection?
A)
Angle of incidence is never equal to angle of reflection
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B)
Angle of incidence is always greater than the angle of reflection
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C)
Angle of incidence is always smaller than the angle of reflection
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D)
Angle of incidence is always equal to the angle of reflection
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E)
None of these
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Which one of the following statements about the sun is incorrect?
A)
Temperature of the surface of the sun is about \[6000{}^\circ C\]
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B)
Sun's diameter is about 100 times that of the earth
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C)
Sun is a huge ball of hot gases, mostly helium and oxygen
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D)
Sun also rotates on its axis
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E)
None of these
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The tap water can be purified further at home to make it absolutely safe for drinking by:
A)
filtering (using porcelain candle filter or electric water filter)
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B)
boiling
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C)
chlorination
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D)
all of these
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E)
None of these
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Which one of the following statements is not correct about chloroplast?
A)
Chloroplasts are green coloured organelles present in the cytoplasm of plant cell
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B)
The process of photosynthesis takes place in chloroplast
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C)
The green colour of chloroplast is due to the presence of chlorophyll
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D)
Chloroplast are present in cytoplasm and on the surface of cell membranes
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E)
None of these
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An incident ray makes an angle of \[75{}^\circ \] with the surface of a plane mirror, what will be the measure of angle of reflection?
A)
\[15{}^\circ \]
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B)
\[75{}^\circ \]
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C)
\[35{}^\circ \]
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D)
\[35{}^\circ \]
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E)
None of these
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