#1. What volume of carbon (II) oxide is produced by reacting excess carbon with 10dm3 of oxygen?
#2. The rate of diffusion of Y is twice that of Z. If the relative molecular mass of Y is 64 and the two gases diffuse under the same conditions. Find the relative molecular mass of Z.
#3. How many unpaired electrons are there in the P-orbitals of fluorine?
#4. Which of the following molecule is held together by hydrogen bond?
#5. The bond formed between two elements having electronic configurations 1s22s22p63s2 and 1s22s22p4 is what?
#6. In an electrochemical cell, polarization is caused by
#7. The minimum amount of energy required for a reaction to take place is
#8. In an endothermic reaction, if there is loss in entropy, the reaction will
#9. In the laboratory preparation of Ammonia, the flask is placed in slanting positon so as to
#10. In order the error of parallax when taking measurements with a meter rule, the eye should be focused
#11. A load is pulled at a uniform speed along horizontal floor by a rope at 450 to floor. If the force in the rope is 1500N, what is the frictional force on the load?
#12. A rocket is fired from the earth’s surface to a distant planet. By Newton’s law of universal gravitation, the force F will
#13. An object moves in a circular path of radius 0.5m with a speed of 1ms 1. What is its angular velocity?
#14. A pinhole camera is placed 300m in front of a building so that image is formed on a screen 5cm from the pinhole. If the image is 2.5cm high, the height of the building will be
#15. After the reflection from the concave mirror, rays of light from the sun converges.
#16. Dispersion of white light is the ability of white light to
#17. A piece of radioactive material contains 1000 atoms. If its half-life is 20 seconds, the time taken for 125 atoms to remain is
#18. The process in which complex substances are broken down into simpler ones is referred to as
#19. The organ which is sensitive to light in Euglena is the
#20. The organelles present in the cells that are actively respiring and photosynthesizing are
#21. Which of the following describes a characteristic of anthropods?
#22. Which of the following distinguishes a butterfly from a moth?
#23. The plants that grow in deserts or very dry areas are The plants that grow in deserts or very dry areas are referred to as to as
#24. The structural adaptation of desert plants for water conservation is
#25. Fungi are referred to as heterotrophs because they
#26. The blood circulatory system of vertebrates consist of
#27. The blood circulatory system of vertebrates consists of
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