يهونكا اور ان سی حوا کو پیدا کیا جسم مین پھونکا اور ان كو أنكي جسم تم أس وقت تمام فرشتون سی فرمایا که سي ملكر آدم كو سجدہ كرو انهون ني بموجب حكم الري كي ستجده وء کیا اور آدم کي تابع هو سجده نه کیا III. Translate into Hindustani : — In the girl's hand. From the baker's shop. On the soldier's horse. In the rear of the house. He is standing at the door. The man was lying on the ground. I want to see your master. Show me the way to the garden. He has done all he could do. When she heard the news she was much grieved, and sighing deeply retired to her chamber. Mahmúd entered the temple, and was struck with the grandeur of the edifice. The external light was excluded, but the temple was illuminated by a lamp which hung down in the centre from a golden chain. Facing the entrance was Somnat—an idol five yards high, of which two were buried in the ground. Mahmúd instantly ordered the image to be destroyed; when the Brahmans of the temple threw themselves before him, and offered an enormous ransom if he would spare their deity. F3 EXPERIMENTAL SCIENCES. PROFESSOR LIVEING. 1. State the composition by volume of hydrochloric acid. Explain how to prepare each of the components; and how to show the proportions in which they are united in hydrochloric acid. 2. Describe the chief characters of carbon and of each of its compounds with oxygen. Explain fully how to find the combining weight of carbon. 3. Express in symbols the reactions following:(a) Chlorine on solution of potash. (B) Sulphuric acid on barium chloride. (7) Common sodium phosphate on silver nitrate. Calculate the weight of sulphuric acid required to decompose 100 grains of barium chloride, and the weight of the new compound produced (S= 32, Cl= 35.5, Ba= 136). 4. Describe and explain the process of extracting iron from some one of its ores. 5. Define the units usually chosen for measuring temperatures and quantities of heat respectively. If the unit of temperature be that increase of temperature which is required to raise the pressure of a given quantity of air from 30 to 30 1 inches of mercury, to what fraction of a degree centigrade will this unit correspond? 6. Explain fully how to find the tension of aqueous vapour at different temperatures above and below the boiling point. 7. A sensitive thermometer placed under the receiver of an air pump shows, when the pump is worked, a fall of temperature: explain this by reference to a general principle, and illustrate the principle by some other cases. 8. How does the intensity of radiant heat vary with the distance of the source? Describe some experiments which give a practical demonstration of the truth of this law. 9. How is it shown from its effects that lightning is an electric discharge? When a tree is struck by lightning the bark is sometimes ripped off: explain this. 10. Describe Coulomb's torsion electrometer; and explain how to use it to find the law of electric repulsion. 11. If a galvanic current be passed successively through a solution of common salt and one of copper sulphate, the electrodes being platinum, state the effects. What is the relation between the quantities. of the two solutions decomposed in the same time, and the quantity of zinc dissolved in the cell generating the current? 1 12. Explain what is meant by resistance in reference to galvanic electricity, and how it is measured. A galvanic cell consists of plates 3 inches by 2, and if these plates are half an inch apart, and are connected by a copper wire, 10 feet long and 400th of a square inch in section, passing round a galvanometer the needle is deflected 30°; but if the plates be only a quarter of an inch apart, 40 feet more of the wire must be introduced into the circuit in order to keep the needle at 30°: compare the specific resistance of copper with that of the liquid in the cell. 13. Give an account of the changes of declination and inclination of the magnetic needle for changes of place on the earth's surface. Define the horizontal and vertical components of the earth's magnetism; and explain how it is that variations of temperature in the observing room cause an apparent variation in the magnitude of these forces. Does a change of temperature affect the angle of dip? EXPERIMENTAL SCIENCES. F. A. ABEL, F.R.S. 1. It is desired to obtain nitrogen in a state of purity; what is the mode of proceeding? Contrast the physical and chemical properties of nitrogen with those of hydrogen and carbonic acid. 2. Name the compounds of nitrogen with hydrogen and with oxygen, and describe the properties of the most important. 3. Give in symbols the changes which take place when hydrochloric acid is added to marble, and when the resulting gas is passed over a layer of charcoal, heated to redness. What weight of the product, furnished by the second reaction, should be obtained, theoretically, by employing 50 grammes of marble (0= 16, C= 12, Cl= 35.5, Ca= 40)? 4. Give the characteristic properties of the metals contained in common salt, saltpetre, hæmatite, malachite, cinnabar, galena. 5. A bar of bismuth and a similar bar of iron, both coated with wax, are heated at one end, the same source of heat being applied to both. Describe and account for the results which will be successively observed. 6. A thermometer, placed upon a surface of grass on a cloudy evening, shows the same temperature as the air a foot above the grass; but, immediately upon the clouds clearing away, the thermometer resting upon the grass falls. How do you account for this? 7. It is desired to raise the temperature of 5 kilos. of water from 0° to 100° C., by passing into it a current of steam at the temperature of 100° C. How much water must be converted into steam for this purpose? 8. Give a full account of the effects produced by holding a rubbed piece of amber near the knob of a gold-leaf electrometer. What occurs upon removal of the amber, and by what simple means could you modify the result which would then be obtained? 9. Give an account of the different kinds of electrical discharge. What occurs when you approach a pointed metal rod to the charged conductor of an electric machine? 10. Describe some method of generating a voltaic current. Having generated it, you require a method of accurately determining its strength. How will you proceed? 11. A voltaic current is made to circulate round an iron bar, so that its direction is that of the hands of a watch when the observer looks at the end of the bar nearest to him. What is the magnetic condition of this end of the bar? 12. Describe and explain the manner in which a bar of soft iron may be made subservient to the production of a continued succession of powerful electric currents by the employment of a voltaic battery of low power. |