1. When sodium bicarbonate is heated to get sodium carbonate, all are produced EXCEPT?
- (a) CO
- (b) CO2
- (c) Na2CO3
- (d) H20
2. The fourth flotation process is the concentration of are by?
- (a) Magnetically
- (b) Wetting the ore
- (b) Difference in density
- (d) chemically
3. Are the raw materials for the accruing of soda ash EXCEPT?
- (a) Ammonia
- (b) Limestone
- (b) brine
- (d) carbon monoxide
4. Matte is a mixture of?
- (a) CuS and FeS
- (b) Cu20 and FeS
- (b) Cu2S and FeS
- (d) Cu20 and FeO
5. The impurity present in minerals is called?
- (a) Metal
- (b) Ore
- (b) Gangue
- (d) salt
6. All are the raw materials for the manufacturing of urea EXCEPT?
- (a) CO2
- (b) NH3
- (b) H2O
- (d) NaCI
7. What Percentage of nitrogen in urea is?
- (a) 14
- (b) 28
- (c) 60
- (d) 46
8. Blister copper is refined through?
- (a) Concentration
- (b) reduction
- (b) Smelting
- (d) electrolysis
9. Petroleum is separated into different fractions by the process of?
- (a) Simple distillation
- (b) condensation
- (b) Fractional distillation
- (d) destructive distillation
10. Are all steps used for the extraction of metals except?
- (a) Roasting
- (b) smelting
- (b) Evaporation
- (d) bessmiraization
11. Sodium carbonate (Na2CO3) is also known as?
- (a) Washing soda
- (b) soda ash
- (b) Both of these
- (d) none of these
12. Which of the following are the waterborne diseases?
- (a) Cholera
- (b) dysentery
- (b) Typhoid fever
- (d) all of these
13. bond lengths is diamond crystal are
- A) 1.54 pm
- B) 154 pm
- C) 109.5 pm
- D) 1540 pm
14. In interior of silicone (IV) oxide crystal, each silicone atom is directly connected with
- A) Two O-atom
- B) Four O-atom
- C) Two O-atom and two Si-atom
- D) Four Si-atom
15. Iodine is a molecular solid because the force between its molecules are
- A) Ionic
- B) Metallic
- C) Covalent
- D) Vander wall’s forces
16. The coordination number of each ion in NaCl is
- A) 4
- B) 6
- C) 8
- D) 10
17. The beast conductors of electricity are
- A) Ionic solids
- B) Molecular solids
- C) Metallic solids
- D) Covalent solids
18. Which of the following statement is incorrect about silica
- A) Every silicon atom is bonded tetrahedrally to four oxygen atom
- B) Every oxygen atom is bonded to two silicon atoms
- C) Structure of silica is considered to be essentially one molecule
- D) Has very thermal expansion
19. The strength of hydrogen bonding is
- A) 20 times less than a covalent bond
- B) 20 times more than a covalent bond
- C) 20 times less than a ionic bond
- D) 20 times more than a ionic bond
20. Lower alcohols are soluble in water because
- A) Intermolecular hydrogen bonding
- B) Dipole induced dipoles
- C) Low electro-negativity difference between C and H
- D) All of the above
21. Hydrogen bonding is maximum in
- A) Diethyl ether
- B) Benzene
- C) Ethanol
- D) Water
22. The strongest H-bond is
- A) F—H
- B) N—-H
- C) O—-H
- D) O—-F
23. When two ice cubes are passed over each other, they unite to form one cube. This is due to
- A) Covalent attraction
- B) Hydrogen bond formation
- C) Ionic bond formation
- D) Metallic bond formation
24. Strong dipole-dipole forces among the liquid molecules are responsible for
- A) Very high heat of vaporization
- B) Very low heat of vaporization
- C) Very low boiling point
- D) All are correct
25. Which one of the following arrangement usually represents the correct order of increasing interactions?
- A) Hydrogen bonding, London forces, Dipole – Dipole
- B) London forces, Hydrogen bonding, Dipole – Dipole
- C) London forces, Dipole – Dipole, Hydrogen bonding
- D) Dipole – Dipole, London forces, Hydrogen bonding
26. Propanone is miscible in water due to
- A) Both are polar molecules
- B) Dipole-dipole attraction between them
- C) Hydrogen bonding between them
- D) All of these
27. Which of the following can form hydrogen bonding among its molecules more prominently
- A) CH3OH
- B) CHCl3
- C) CH33
- D) All of these
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| Test 6 | Test 7 | Test 8 | Test 9 | Test 10 |
