1 Which of the following alloys is used for making magnets ?   1 Duralumin 2 Stainless Steel 3 Alnico 4 Magnelium   Answer: Option3

2 Which of the following is not correctly matched ?   1 Galena : Lead Sulphide 2 Green vitriol : Copper sulphate 3 Plaster of Paris : Calcium sulphate 4 Calomel : Mercurous Chloride   Answer: Option2

3 40. From which mineral is radium obtained?   1 Rutile 2 Haematite 3 Limestone 4 Pitchblende   Answer: Option4

4 Which of the following is an element?   1 Ruby 2 Sapphire 3 Emerald 4 Diamond   Answer: Option4

5 Which of the following is the best conductor of Electricity ?   1 Ordinary water 2 Sea water 3 Boiled water 4 Distilled water   Answer: Option2

6 Air is a/an —   1 Compound 2 Element 3 Mixture 4 Electrolyte   Answer: Option3

7 The science related with the study of living–   1 Physics 2 Chemistry 3 Biology 4 Mathematics   Answer: Option3

8 The charcoal used to decolourise raw sugar is —   1 Animal charcoal 2 Sugar charcoal 3 Cocoanut charcoal 4 Wood charcoal   Answer: Option4

9 The chemial name of Uria is–   1 Aneurin 2 Chloroetane 3 Carbamide 4 None of these   Answer: Option4

10 When an iron nail gets rusted, iron oxide is formed   1 without any change in the weight of the nail 2 with decrease in the weight of the nail 3 with increase in the weight of the nail 4 without any change in colour or weight of the nail   Answer: Option3