1. Deficiency of vitamin A results in A. lose in apetite B. skin diseases C. sterility D. retarted growth Ans: D
2. Which one of the following contains cobalt ? A. Riboflavin B. Vitamin B₁₂ C. Vitamin A D. Vitamin B₆ Ans: B
3. Night-blindness is caused due to the deficiency of A. Vitamin D B. Vitamin A C. Vitamin C D. Vitamin B Ans: B
4. Alkaline hydrolysis of esters is known as A. esterification B. saponification C. dehydration D. alkalination Ans: B
5. Deficiency of vitamin E causes A. Beriberi B. Scurvy C. Hemolytic anemia D. None of these Ans: C
6. Scurvy is caused due to the deficiency of vitamin A. B₁ B. C C. K D. A Ans: B
7. Which of the following statements, is not correct, about glass? A. Because of its high viscosity glass exists in solid state B. There is no definite melting point for glass. C. The silicate units in glass are arranged in a way that is quite similar to the arrangement found in liquids. D. Glass is a solid because it has a regular crystalline arrangement. Ans: D
8. The property of plasticity is shown by clay , when it is A. mixed with proper proportion of water B. heated strongly C. dried at room temperature after kneading D. glazed Ans: A
9. One of the properties of glass is its transparency. This property of glass is due to A. its high viscosity. B. regular arrangement of silicate units in glass. C. irregular arrangement of silicate units in glass. D. its high coefficient of thermal expansion. Ans: C
10. Washing soaps are potassium and sodium salts of A. dicarboxylic acids B. fatty acids C. mineral acids D. None of these Ans: B
11. When glass is heated, it A. does not melt at a fixed temperature B. vapourises C. melts only above 1000°C D. None of these Ans: A
12. Glass is a transparent substance obtained by heating silica with oxides or carbonates of metals. Glass is a mixture of A. phosphates B. sulphates C. oxides D. silicates Ans: D
13. Potash (Potassium carbonate) is used as a fertilizer. It is also known as A. azo compound B. oil of vitriol C. pearl ash D. Glauber’s salt Ans: C
14. Soft soaps are A. sodium and potassium salt B. sodium salt of fatty acids C. potassium salt of fatty acids D. potassium salt of sulphonic acids Ans: C
15. Soaps are A. sodium salts of sulphuric acids containing carbon atoms 10 to 16 B. sodium salts of fatty acids containing carbon atoms 16 to 18 C. sodium salts of trihydroxy alcohols D. none of these Ans: B
16. Soaps are sodium salts of fatty acids. Which of the following fatty acid does not form soap? A. Butyric acid B. Oleic acid C. Palmitic acid D. Stearic acid Ans: A
17. Which one of the following is not contained in portland cement ? A. Ca₃Al₂O₆ B. Ca₃SiO₅ C. Ca₂SiO₄ D. Ca₃(PO4)₂ Ans: D
18. What is the reason for white cement to be white? A. It does not contain carbon B. It does not contain silicon C. It does not contain iron D. It does not contain calcium Ans: C
19. Which one of the following is not present in cement? A. Clay B. Alumina C. Alum D. Gypsum Ans: C
20. Which substance is used to retard the setting action of cement? A. CaO B. Al₂O₃ C. CaSO₄, 2H₂O D. Na₂O + K₂O Ans: C
21. Which of the statements about glass are correct? 1. Glass is a super-cooled liquid having infinite viscosity. 2. Violet coloured glass is obtained by adding MnO₂. 3. Glass is a man-made silicate. 4. Glass is a crystalline substance. Select the correct answer using the codes given below. A. 1, 2 and 4 B. 2, 3 and 4 C. 1, 2 and 3 D. 1 and 3 Ans: D
22. Which one among the following is the main ingredient in cement? A. Gypsum B. Limestone C. Clay D. Ash Ans: B
23. Glass is actually A. a crystalline solid B. an ionic solid C. an elastic solid D. a vitrified liquid Ans: C
24. The major component used in preparation of different types of glasses is A. silica B. sodium borate C. calcium silicate D. sodium silicate Ans: A
25. The reaction that takes place in soap making is called saponification. Basically soap is sodium or potassium salts of A. long chain monocarboxylic acids B. glycerol C. long chain dicarboxylic acids D. long chain tricarboxylic acids Ans: D
26. The most important raw materials used in the manufacture of cement are A. potassium nitrate, charcoal and sulphur B. limestone, clay and gypsum C. transition metal oxides, sodium hydroxide or potassium hydroxide D. limestone, sodium carbonate and silica Ans: B
27. Given below is an approximate composition of a substance : CaO 60-70% SiO₂ 20-25% Al₂O₃ 5-10% Fe₂O₃ 2-3% The substance is A. plaster of Paris B. cement C. marble stone D. quartz Ans: B
28. The principle of cleaning by soap is A. surface tension B. floatation C. viscosity D. elasticity Ans: A
29. By which one among the following mechanisms, soap removes dirt (soil) from cloth? A. Soap dissolves the soil as such B. Soap reacts with soil and converts them into soluble silicates C. Soap takes away the oily part of the soil and thus separates the soil from the cloth D. The soap molecules bind with the soil, lift the soil and keep it suspended which can then be rinsed away Ans: D
30. Consider the following statements 1. Soap cannot be used in acidic water. 2 Ionic part of a soap is [latex]—COO^–[/latex]· [latex]Na^+[/latex]. 3. Soap dissolves in water faster then detergent. Which of the statements given above is/are correct? A. 1 and 2 B. 2 and 3 C. 3 only D. 1 only Ans: A
31. What is the composition of nitrolim – a chemical fertilizer ? A. Nitrogen and limestone B. Calcium carbide and nitrogen C. Calcium carbide and carbon D. None of these Ans: D
32. Which one of the following correctly defines the state of glass? A. Crystalline solid B. Super cooled liquid C. Condensed gas D. Liquid crystal Ans: B
33. Flint glass is obtained from which of the following ? A. Zinc and barium borosilicate B. Sand, red lead and potassium carbonate C. Sodium aluminum borosilicate D. Pure silica and zinc oxide Ans: B
34. Which of the following statements about vitamin B12 is incorrect ? A. It has a cobalt atom B. It occurs in plants C. It is also present in rain water D. It is needed for human body in very small amounts Ans: C
35. Washing soap can be prepared by saponification with alkali of which of the following oil A. Rose oil B. Paraffin oil C. Groundnut oil D. Kerosene oil Ans: C
36. The aqueous solution of one of the following vitamins is dark in colour A. B₁ B. B₂ C. B₆ D. B₁₂ Ans: D
37. Which one of the following is a vitamin? A. Benzoic acid B. Ascorbic acid C. Oxalic acid D. Formic acid Ans: B