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Quiz 2
Mdcat-past-papers - NMDCAT Quiz
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Board: NMDCAT |
21. Which of the following store food?
Chromoplast
leucoplast
chloroplast
all of the above
22. Avogadro's constant is number of:
Atoms in 1g He
Molecules in 35.5g chlorine
Electrons in 2g Hydrogen
Atoms in 24g Mg
23. Diameter of atom is:
0.9nm
0.2nm
0.5nm
1nm
24. Size of molecules depends upon:
No. of atoms
Shape of atoms
Both A & B
None of the above
25. How many molecules are there in 2.1 mole of CO₂?
1.26 x 10²⁴
3.49 x 10²⁴
2.53 x 10²⁴
3.79 x 10²⁴
26. Ascorbic acid (Vitamin C) has high percentage of:
Carbon
Hydrogen
Oxygen
Nitrogen
27. For the gaseous phases reaction, when number of moles of reactants and products are equal:
The values of Kn and Kz is different
The value of Kp is greater than Kz
The value of Kz is greater than Kp
The value of Kp and Kc are same
28. Which gas obeys all gas laws?
Ideal gas
CO2
O2
Cl2
29. According to the general gas equation, density of an ideal gas depends upon:
Pressure
Temperature
Molar mass of gas
All of the above
30. One mole of an ideal gas at STP has volume in dm³:
22.414
22412
224.4
2244.1
31. The actual volume of gas molecules is considered negligible of following pressure:
2atm
6atm
4atm
8atm
32. How many H-bonds a water molecule can form with other water molecule?
1
2
3
4
33. CO₂ and SO₂ both are triatomic molecules but heat of vaporization of SO₂ is greater than that of CO₂ due to:
High electronegativity of S
Greater size of SO₂
SO₂ is polar and CO₂ is non-polar
SO₂ is more acidic than CO₂
34. Which of the following has the lowest vapor pressure at 20°?
Diethyl ether
Chloroform
Carbon tetrachloride
Water
35. What is true about evaporation?
It occurs at all temperatures
It is a surface phenomenon
It causes cooling
All of the above
36. Which has highest vapor pressure?
H₂O
ethanol
Diethyl Ether
ethyl glycol
37. Which of the following is not a molecular solids:
Sulphur
Bromine
Phosphorus
Carbon dioxide
38. Polymorphs have different:
Chemical properties
bonding
structure
all
39. Solids which are more volatile:
Ionic
Covalent
Molecular
Metallic
40. Greatest lattice energy is for:
LiF
NaCl
KBr
RbBr
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