Science Paper:
When dilute Sulphuric acid is added to Zinc, you will observe that:
a) a ppt. is formed b) reaction mixture turns yellow
c) container becomes hot d) bubbles start coming out of surface of Zinc.
The correct observation when you mix barium chloride with sodium sulphate solution is:
a) a white ppt. after some time b) a yellow ppt. is formed after sometime
c) a white ppt. is formed instantaneously
d) a yellow ppt. is formed instantaneously
Following substances are added to water in a beaker. A true solution is found when:
a) kerosene mixed with water b) sugar mixed with water
c) soap mixed with water d) milk mixed with water.
Solution of egg albumin in water:
a) a true solution b) a colloidal solution c) a suspension d) none of these.
The density of ice is:
a) greater than water b) less than water c) equal to water d) none of these
The density of glass stopper in water:
a) decreases b) increases c) remains same d) none of these
The formula of frequency of simple pendulum:
a) 2pÖ l /g b) 2pÖg/ l c) ½pÖ l /g d) ½pÖg/l
The normal temperature of human body is:
a) 37°C b) 98.4ºC c) 37ºF d)102°F
The “Power House” of the cell is:
a) chloroplast b) nucleolus c) mitochondria d) Golgi apparatus
The largest cell in human body is:
a) Nerve cell b) Muscle cell c) Liver cell d) Kidney cell
The fibrous tissue connecting two bones is:
a) connective tissue b) tendon c) ligament d) adipose tissue
Which of the following carries water in plants:
a) Xylem b) Phloem c) Sieve tubes d) Companion cell
Methane is prepared by heating:
a) Sodium Methanoate & Sodalime b) Sodium Ethanoate & Sodalime
c) Sodium Ethanoate & Washing Soda d) Sodium Methanoate & Slaked lime
Methane has:
a) No colour, no odour and no taste
b) yellow colour, faint odour & oily taste
c) No colour, faint odour and no taste
d) reddish colour, no odour and no taste
The component of food which is a major energy supplier is:
a) cellulose b) protein c) carbohydrates d) amino acids
Stomata are absent in:
a) Hydrophytes b) Xerophytes c) Mesophytes
d) None of these
Abdomen of cockroach contains:
a) 10 segments b) 8 segments c) 20 segments d) 5 segments
Body of fish is divided into:
a) head & cephalothorax b) head & trunk c) head,neck,trunk & tail
d) head, thorax & abdomen
The device used to check the purity of milk is:
a) Lactometer b) Hydrometer c) Speedometer d) Barometer
Sugar can be separated from sugar solution by:
a) Distillation b) Sublimation c) Filtration d) Burning
Section B
Which of the following examples is a chemical change:
a) Melting of ice b) freezing of water c) condensation of steam
d) Burning of LPG
Which one among the following is a mixture:
a) Sodium chloride b) Copper sulphate c) Salt & sand
d) Zinc sulphate
Addition of oxygen & removal of hydrogen is known as:
a) Oxidation b) reduction c) decompostion d) displacement
The ship can sail easily on sea water because:
a) Salty water is denser b) it is less dense c) it is salty d) it is still water
One atmosphere is the unit of:
a) Density b) specific gravity c) energy d) Pressure
A fireman weighing 80kg. Slides down a pole. If the resisting force is 720N, his acceleration would be:
a) 1m/sec² b) 0.1 m/sec² c) zero d) 0.9 m/sec²
Chloroplast plays a significant role is:
a) Photosynthesis b) lipid synthesis c) Protein synthesis d) secretion
The barrier between protoplasm and outer environment in an animal cell is:
a) cell wall b) plasma membrane c) tonoplast d) nuclear membrane
When we add drops of iodine solution in a test tube containing food sample of starch, the colour appears is:
a) Pink b) yellow c) blue black d) red
Biting and chewing mouth parts are found in:
a) Cockroach b) earthworm c) pigeon d) fish.
What is echo? (1)
Define the term ‘Momentum’. (1)
Which method can be used to separate a mixture of naphthalene & common salt? (1)
What is the numerical value of Avogadro number? (1)
What do you understand by the terms loudness & timbre? (2)
What is weight? How is it different from mass? Give two differences. (2)
Define the mass number of an element. Name the particles that actually determine the mass of an atom. (2)
Graphite is used for making electrode in a dry cell. Why? (2)
OR
Which produces more severe burns: boiling water or steam? Why?
If 1g of SO2 contains ‘x ’ molecules, what will be the number of molecules in 1g of CH4? (3)
What are isotopes? What are radioactive isotopes? Give any 2 uses of radioactive isotopes. (3)
What is evaporation? State 2 factors that affect evaporation. Why does a desert cooler cool better on a hot dry day? (3)
What is buoyant force? What is buoyancy? Give two factors on which it depends. (3)
A car is traveling at a speed of 36 Km/hr. A force acts upon the car so that it acquires a velocity of 90km/hr in 6 sec. Calculate the work done and the force applied on the car. (3)
What is motion? What are types of motion? Define them with one example each. (3)
How is water purified & supplied on a large scale at water works? Explain with diagram. (5)
OR
Define ‘solution’, ‘suspension’ & ‘colloid’. Give 2 characteristics & 2 examples of each.
What is wave motion? What is sound? Give the audible frequency range for the human beings. What are Ultrasounds? Mention any two uses of ultrasound. (5)
OR
What are sound waves? How do they travel in air? How can a human being hear the sound? Explain.
Section B
What is apiculture? (1)
Name any two biogeochemical cycles. (1)
What are congenital & acquired diseases? Give one example of each. (2)
Give two differences between RBC’s and WBC’s. (2)
Differentiate between hypo tonic, hypersonic & isotonic solutions. (3)
Write three each of ‘aquatic adaptations’ and ‘volant (aerial) adaptations’. (3)
Write three distinctions between monocots & dicots. Give one example of each. (3)
OR
Who proposed binomial nomenclature? What is the importance of binomial nomenclature?
Write 5 differences between mixed cropping and intercropping. (5)
OR
What is artificial insemination? Name a center located in India for this purpose. What precautions must be taken during it? What are its advantages? Name any two improved breeds of cows developed in India.

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Thanks a lot for sharing the information.
All the best to you. God bless you.