Q. As crops grow and are then harvested, the agricultural land suffers loss of certain elements. Which of the following is a primary nutrient?
1) Nitrogen
2) Phosphorus
3) Potassium
4) All of these
Q. Glycerol is used for all of the following, except
1) As a sweetening agent in beverages and confectionery
2) As an antifreeze in automobile radiators
3) As a lubricant for heavy machinery
4) For preparation of better quality of soaps and cosmetics
Q. As the atomic number increases, electron affinity
1) Decreases
2) Increases
3) Remains constant
4) Approaches infinite value
Q. Which of the following was the first organic compound to be synthesised in the laboratory?
1) Citric acid
2) Formic acid
3) Lactose
4) Urea
Q. Fats and their derivatives occurring in living systems are collectively known as
1) Carbohydrates
2) Proteins
3) Lipids
4) Vitamins
Q. Which of the following statements about the properties of water is not correct?
1) It has low specific heat which makes it a poor storehouse of energy
2) It does not evaporate or freeze as easily as many other liquids do
3) It has great dissolving power which arises from its polar character and high dielectric constant
4) It is a convenient medium for chemical reactions and biological processes
Q. Which of the following elements has 92 as the atomic number?
1) Lead
2) Platinum
3) Thorium
4) Uranium
Q. Silicon Carbide is generally used as a/an
1) Catalyst
2) Solvent
3) Abrasive
4) Dehydrating agent
Q. Ferro silicon is an alloy of
1) Iron and Silicon
2) Silicon, Tin and Zinc
3) Iron, Silicon and Tin
4) Iron, Silicon and Zinc
Q. Which is the most reactive hydrogen atom in alkanes?
1) Primary
2) Tertiary
3) Secondary
4) All of these are equally reactive
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