▪ Which of the following pairs is incorrect? Poliomyelitis-monkey
▪ Which of the following statements is correct Pulmonary artery carries impure blood
▪ When sound is reflected from floor, ceiling or a wall , it mixes with the original sound and change its complexion, it is called as Reverberation
▪ The of light in vacuum is about 300 Million kilometers per second
▪ Ice can be changed to water by Changing the motion of the water molecules
▪ The temperature of liquid nitrogen is -196°C
▪ Information can be sent over long distances in the form of Light signals through optical fibres
▪ Computers can Add and subtract information only.
▪ IBM stands for International Business Machines
▪ Chemicals used to kill weeds are called as Herbicides
▪ The cytoplasm consists of several types of structures, which are called Organelles
▪ The structure of DNA was elaborated by Watson and Crick in 1953
▪ In a DNA molecules, the rulefor base pairing is Adenine always bound with thymine and cytosine with guanine
▪ As per eating habit, squirrels are Frugivorous
▪ Water loss from leaves through stomata is called as Transpiration
▪ Nervous system in human consists of:
Brain, spinal cord and nerves. (central and peripheral)
▪ In human eye, the light sensitive layer made of specializes nerve cells, rods and cones is called as The retina.
Copper can be converted into gold by Artificial Radioactivity
▪ In winter an. iron pipe feel colder than a wooden window . This is because wood is non-Conductor.
▪ The echo (reflected sound) will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least 56fft
▪ It is possible to recognize a person in the dark by simply hearing his unique voice . It is because of the pitch
▪ When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is Visible
▪ A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be 3 feet
▪ The principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use Ultrasonic
▪ In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called Fusion nuclear reaction
▪ German silver is an alloy of approximately 60% copper, 20% nickle and 20% zinc
▪ The Continent Antarctica lies at the South pole
▪ The temperature of the dead body is temperature of the place where it is kept Cusec is a volumetric unit for measuring the flow of liquids, equal to one cubic foot per second
▪ Magnifying power of a simple microscope can be increased by increasing focal length of the lens
▪ A very important practical application of properties of matter is hoeing or “godi” practiced
by the farmers. This property of matter is called Capillarity
It is observed that the total pressure exerted by air on the man of average siz is around
14.7 lb wt. per square inch. But the man feels quite comfortable,. It is becausemof gravity
A nuclear reactor is a device used to carry out controlled nuclear reaction whereas GM counter is a device used to detect nuclear Radiation
▪ A body can escape the gravitational pull of the earth if it is thrown up with a velocity of 7 miles per sec
▪ Night vision is possible with the help of Infrared Rays
▪ Myopia is a defect of human eye. it can be corrected by using a lens called Concave lens
▪ Walnuts can be broken in the hand by squeezing two together but not one. It is because of Work done.
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