Q. 1 Which of the following elements is a metalloid?
A) boron
B) arsenic
C) All of the above
D) antimony
✔ All of the above
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Q. 2 Which among the following minerals is also known as Horn Silver?
A) Zinc Phosphate
B) Silver Chroride
C) Silver Sulphide
D) Silver Iodide
✔ Silver Chroride
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Q. 3 What provides electrons for the light reactions?
A) Oxygen
B) Water
C) Light
D) Carbon dioxide
✔ Water
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Q. 4 A disaccharide is formed by the chemical bonding of
A) two polysaccharides
B) two monosaccharides
C) All the above
D) one monosaccharide and one polysaccharide
✔ two monosaccharides
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Q. 5 Which type of reaction occurs when carbon burns in oxygen to give carbo dioxide?
A) Substition reaction
B) Addition reaction
C) Decomposition reaction
D) Combustion reaction
✔ Combustion reaction
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Q. 6 Which of the following is not a pure substance?
A) Carbon dioxide
B) Oxygen
C) Milk
D) Water
✔ Milk
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Q. 7 Which are two chemicals used to purify water?
A) Fluorine & Iodine
B) Chlorine & Fluorine
C) Fluorine & Iodine
D) Chlorine & Hydrogen peroxide
✔ Chlorine & Hydrogen peroxide
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Q. 8 Ultimate strength to cement is provided by
A) Tricalcium silicate
B) Di-calcium silicate
C) Tri-calcium aluminate
D) Tetra calcium alumino ferrite
✔ Di-calcium silicate
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Q. 9 Plaster of Paris ______. I. changes into gypsum on mixing with waterII. is CaSO4.2H2OIII. is used for decoration
A) Only I and III
B) Only I and II
C) All I, II and III
D) Only II and III
✔ Only I and III
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Q. 10 Which one is not the isotopes of hydrogen
A) Deuter
B) Protium
C) All
D) Tritium
✔ Tritium
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Q. 11 The carbon tetrachloride molecule (CCl4) is
A) a nonpolar molecule with nonpolar bonds
B) a nonpolar molecule with polar bonds
C) a polar molecule with nonploar bonds
D) a polar molecule with polar bonds
✔ a nonpolar molecule with polar bonds
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Q. 12 The transport phenomenon occurs only in _____ state of a gas and is ______
A) Non-equilibrium, reversible
B) Non-equilibrium, irreversible
C) equilibrium, reversible
D) equilibrium, irreversible
✔ equilibrium, irreversible
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Q. 13 What is the common name of CaOCl2?
A) Baking Soda
B) Baking Powder
C) Washing Soda
D) Bleaching Powder
✔ Bleaching Powder
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Q. 14 Which of the following is a Heterogeneous Mixture?
A) Table salt
B) Air
C) Brass
D) Soda
✔ Soda
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Q. 15 Identify the metalloid in the following list?
A) Sulphur
B) Silicon
C) All of the above
D) Scandium
✔ Silicon
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Q. 16 Chemical name of Gold?
A) Ferrus
B) Argentinum
C) Selenium
D) Aurum
✔ Aurum
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Q. 17 Carbon, Diamond and Graphite are together called
A) Isotopes
B) Isomers
C) Isomorphs
D) Allotrope
✔ Allotrope
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Q. 18 Which of the following is a characteristic of the monopolistic competition?
A) Each firm produces a differentiated product
B) A large number of firms compete
C) Barriers to entry
D) Both answers A and B are correct
✔ Both answers A and B are correct
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Q. 19 Which must be true for metamorphism to occur?
A) Tons of pressure must be applied.
B) The parent rock must be in solid form.
C) All the above
D) The process must take place underground.
✔ All the above
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Q. 20 Which pair of atoms has the highest electronegativity difference? (Calcium's electronegativity is 1.0 Fluorine's electronegativity is 4.0 Hydrogen's electronegativity is 2.2 Sodium's electronegativity is 0.93)
A) Ca-F
B) F-F
C) Na-F
D) H-F
✔ Na-F
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