1. Neutral solution has a pH value of?
- (a) 3
- (b) 5
- (c) 7
- (d) 14
2. the p0H of 0.001M solution of nitric acid is?
- (a) 0.001
- (b) 10.0
- (c) 11
- (d) 14
3. When a strong base and weak acid reacts, the only products are?
- (a) Neutral salt and water
- (b) basic salt and water
- (c) Acidic salt and water
- (d) None of these
4. NH3 is a base according to?
- (a) Arrhenius
- (b) Lewis
- (c) lowery and bronsted
- (d) acidic, basic salt and water
5. Which one of the following is a basic salt?
- (a) KCI
- (b) Pb OH CI
- (b) NaCI
- (d) KHSO4
6. The base which are soluble in water is called?
- (a) Acids
- (b) Salts
- (c) alkalis
- (d) amphoteric
7. An example of a weak acid is?
- (a) HNO3
- (b) CH3COOH
- (b) Hcl
- (d) H2SO4
8. The formula that represents the number of atoms in one organic compound molecule is called the?
- (a) Molecular formula
- (b) structural formula
- (c) Condensed formula
- (d) none of these
9. The compound C6H12 must have?
- (a) All single bonds
- (b) at least one double bond
- (c) Al least one triple bond
- (d) all double bonds
10. Is alkyl halide composed of carbon and hydrogen?
- (a) Oxygen
- (b) Nitrogen
- (c) Halogen
- (d) sulfur
11. The number of moles of CO2 which contain 16g of oxygen
- A) 0.25
- B) 1.00
- C) 0.50
- D) 1.50
12. The mass of one molecules of O2 is
- A) 320g
- B) 32 g
- C) 0.32 g
- D) 12g
13. Amount of oxygen in grams which contains 1.5 × 1022 molecules
- A) 0.08
- B) 0.80
- C) 80
- D) 1280
14. Number of electrons in half mole Na+
- A) 10
- B) 5.5 NA
- C) 5
- D) 5NA
14. 3×10-21 mole of an amino acid having molecular mass 200 g mole-1, would have molecules
- A) 200
- B) 1800
- C) 300
- D) 36000
16. The relative atomic mass of oxygen is 16amu. What is the mass of 2 mole of oxygen gas?
- A) 64 g
- B) 32 g
- C) 100 g
- D) 71 g
17. Which of the following has maximum mass
- A) 25g of iodine
- B) 25g atom of oxygen
- C) 25g mole of water
- D) 25g of nitrogen gas
18. Mass of one mole of chlorines gas is
- A) 32 g
- B) 71 g
- C) 35.5 g
- D) 46 g
19. Which of the following is not true for a mole?
- A) It is counting unit
- B) It is the gram atomic or gram formula mass of substance
- C) It contains 6.023 × 1023 particles
- D) It contains different number of particles for different substances
20. In a mass spectrometer, increasing the electric field with constant magnetic field result in
- A) Increased radius ‘r’
- B) Increased ionization
- C) Decreased radius ‘r’
- D) None of the above
21. Molecular ions are produced in mass spectrometer. Which type of molecular ions formed abundantly
- A) Negatively charged
- B) Positively charged
- C) H+ ions
- D) equal positive and negative ions
22. The separation of different isotopes in the mass spectrometer is done on the basis of:
- A) Different amount of positive charge on each ion
- B) Different values
- C) Different values
- D) Velocities of the ions
23. Which of the following isotopes will have maximum deflection in magnetic field during mass spectrometric analysis
- A) C-12
- B) C-14
- C) C-13
- D) Same deflection
24. An elemtn has two isotopes A-63 and A-64 with average atmic mass 63.5 amu. Relative abundance of lighter isotopes is
- A) 50%
- B) 25%
- C) 40%
- D) 75%
25. During combustion analysis , which one is used for absorbing carbon dioxide
- A) 50% KOH solution
- B) Mg (ClO4)2
- C) 5% KOH
- D) Silica gel
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| Test 6 | Test 7 | Test 8 | Test 9 | Test 10 |
