1. The agricutural tool used to level the field is :
a) harrow
b) leveller
c) seed drill
d) plough

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2. Which of the following statements is NOT true?
a) Rotation of crops improves the fertility of soil
b) Rotation of crops saves a lot of nitrogenous fertilisers
c) Rotation of crops helps mixing of nutrients uniformly
d) Rotation of crop helps in the weed control and pest control?

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1. The transmission and infection of Entamoeba histolytica is through:
a) Mosquito bite
b) Birds droppings
c) Sweat
d) Contaminated food and water

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2. It is caused by a protozoan /It causes fever / It can cause anaemia /
The above information describes the disease :
a) cholera
b) malaria
c) filiriasis
d) hepatitis B

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1. During long distance travel you would like to take drinking water in a bottle made up of :
a) glass
b) plastic
c) leather
d) steel

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2. Nylon is obtained from:
a) Coal
b) air
c) water
d) All of above

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1. Fe₂O₃ is the chemical formula of:
a) monazite
b) magnetite
c) haematite
d) bauxite

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2. Brass is an alloy of:
a) Cu, Zn
b) Cu, Sn
c) Cu, Al
d) Sn, Pb

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1. Fly ash is produced by :
a) petroleum
b) natural gas
c) coal
d) all of the above

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2. Plants store solar energy in the form of :
a) electric energy
b) thermal energy
c) chemical energy
d) bio energy

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1. Which of the following statements is NOT true?
a) CO₂ is the best fire extinguisher
b) Global warming can cause acid rain
c) Burning of coal and diesel releases sulphur dioxide gas
d) LPG has higher calorific value than biogas

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2. In foam type fire extinguisher__________is present in bottle.
a) NaHCO₃
b) Al₂(SO₄)₃
c) AI (OH)₃
d) Na₂SO₄

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1. Which are the factors that pose a great threat to biodiversity?
a) Habitat destruction
b) Disturbance and introduction of alien species
c) Man interference with nature
d) All of these

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2. Energy flow in an ecosystem is:
a) Unidirectional
b) Multidirectional
c) Bidirectional
d) Circular

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1. Cheek cells are made up of :
a) Muscle cells
b) epithelial cells
c) nerve cells
d) brain cells

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2. Cell is the best defined as:
a) The structural and functional unit of life
b) The smallest part of a living being
c) The part that can be seen only under microscope
d) The starting point in the life of all organism

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1. Binary fission gives rise to:
a) Three daughter cells
b) Two daughter cells
c) One daughter cell
d) Four daughter cells

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2. Fertilization is external in:
a) Fish and amphians
b) Birds and fish
c) Amphibians and birds
d) Reptiles and fish

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1. When menstruation stops, the uteine lining is very ,thin. The repair of the uterine lining takes about _______ days
a) 7
b) 13
c) 9
d) 11

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2. Which of the following will occur in females at puberty?
(I) Ovulation
(II) Enlargement of breasts
(III) Broadening of hips
a) I and II only
b) I and III only
c) II and III only
d) I, II and III

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1. Friction can be increased by:
a) Making the surfaces rough
b) Using dry surfaces
c) Increasing the weight
d) All of the above

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2. In football , a goal keeper stops a ball . This is due to
a) friction between the ball and hand of goal keeper
b) decrease in speed of ball due to air resistance
c) application of force by goal keeper
d) all of the above

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1. When a coin and a feather are dropped simultaneously from the same height, the coin strikes the ground first. This is because of:
a) Friction
b) Gravitational force
c) Mass of coin
d) None of these

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2. What would happen to a moving objects if there would be no friction?
a) The object will keeping moving
b) The object will stop
c) The object will change speed
d) The object will change direction

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1. The amplitude of vibrating and its frequency can change suddenly in a :
a) pitch
b) musical sound
c) noise
d) all of the above

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2. The frequency of a source is 20 KHz. The frequency of sound wave produced by it in water and air will be :
a) same as that of source ~ 20 kHz
b) > 20 kHz
c) < 20 kHz
d) depends upon velocity

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1. Which copper rod donates electrons to hydrogen ions , it gains ___________charge .
a) positive
b) negative
c) no charge
d) cant say

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2. When current is passed through molten sodium chloride:
a) Sodium is deposited at the negative electrode and the chlorine gas is formed at the positive electrode
b) Sodium is deposited at the positive electrode and chlorine gas is formed at the negative electrode
c) Sodium is evaporated and chloride ions are formed at the negative electrode
d) Sodium is deposited at the positive electrode and chlorine is deposited at the negative electrode

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1. Which of the following country in the world is most prone to earthquake ?
a) India
b) America
c) China
d) Japan

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2. When a glass rod is rubbed with silk cloth , it acquires positive charge because :
a) electron are added to it
b) electrons are removed from it
c) protons are added to it
d) protons are removed from it

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1. Plane mirrors are arranged parallel to each other to get :
a) a single image
b) two images
c) a large number of reflected images
d) no image

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2. Plane mirrors are arranged at an angle to get a number of coloured images in :
a) periscope
b) kaleidoscope
c) telescope
d) thermoscope

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1. The space vehicle used to send men on to the moon is:
a) Apollo
b) Gemini
c) Sputnik
d) Discovery

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2. The planet also known as morning star is:
a) Venus
b) Mars
c) Mercury
d) Jupiter

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1. Materials that can be recycled include:
(I) old newspapers
(II) aluminium tin cans
(III) plastic pails
a) I only
b) I and II only
c) I and III only
d) I, II and III

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2. The pollutants chlorofluorocarbons are major source of air pollution contributed by :
a) industrial effluents
b) aerosols
c) sewage pollutants
d) all of the above

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