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Hassan
1.Which one of the following is the weakest force among the atom?
A. ionic force
B. metallic force
C. intermolecular force
D. ionic force
2.In double covalent bond, every atom provides
A. 1 electrons
B. 2 electrons
C. 4 electrons
D. 1 electrons
3.The property of being polar in nature is called:
A. Polarity
B. Chemistry
C. Both
D. Polarity
4.Which is an acceptor molecule/ion?
A. N2
B. O2
C. H+
D. N2
5.Identify when pair has polar covalent bonds:
A. O2 and Cl2
B. H2O and N2
C. H2O and C2H2
D. O2 and Cl2
6.The mass of one mole of electrons is.
A. 1.008 mg
B. 0.55 mg
C. 0.184 mg
D. 1.008 mg
7.One mole of SO2 contains
A. 6.02 x 1023atoms of oxygen
B. 18.1 x 1023atoms of SO2
C. 6.02 x 1023atoms of Sulphur
D. 6.02 x 1023atoms of oxygen
8.During combustion analysis, CO2 produced is absorbed in
A. Mg (CLO4)2
B. 50% KOH
C. CaCl2
D. Mg (CLO4)2
9.Calcium has isotopes
A. 7
B. 9
C. 1
D. 7
10.CO+ is an example of.
A. Free radical
B. Cationic molecular ion
C. Anionic molecular ion
D. Free radical
11.The largest number of molecules are present in
A. 3.6 of H2O
B. 4.6 g of C2H5OH
C. 2.8 g of CO
D. 3.6 of H2O
12.I molar volume of a gas at S.T.P is occupied by
A. 1 g of gas
B. 6 x 1023g of gas
C. 22.4 m3of gas
D. 1 g of gas
13.What has a mass equal to that of one mole of water.
A. 22.4 dm3 of water
B. One mole of steam
C. One molecule of water
D. 22.4 dm3 of water
14.The volume occupied by 1.4 g on N2at S.T.P is
A. 2.24 dm3
B. 22.4 dm3
C. 1.12 dm3
D. 2.24 dm3
15.Which of the following contains the same number of molecules as 9 g of water.
A. 2 g of hydrogen gas
B. 14 g of nitrogen gas
C. 32 g of oxygen gas
D. 2 g of hydrogen gas
16.The drying agents used in desiccator is.
A. BeCl2
B. MgCl2
C. CaCl2
D. BeCl2
17.Safe and reliable method of drying crystals is through.
A. Pressing it between folds of filter paper
B. Drying it in oven
C. Evaporation of solution
D. Pressing it between folds of filter paper
18.One of the following substances does not undergo sublimation
A. KMnO4
B. Naphthalene
C. NH4CI
D. KMnO4
19.If fluted fitter paper, rate of filtration increases as compared tot he cone shaped filter paper because.
A. It has greater number of holes in it.
B. It has greater surface are of filtration
C. Fluted filter paper has greater pore sizes than cone shaped filter paper.
D. It has greater number of holes in it.
20.To achieve a good separation, the two liquids are gently shaken to increase their area of.
A. Miscibility
B. Separation
C. contact
D. Miscibility
21.A filtration process could be very time consuming if it were not aided by a gentle suction, which is developed
A. If the paper covers the funnel up to its circumference
B. If the paper has got small sized pores in it
C. If the stem of the funnel is large so that it dips into the filtrate
D. If the paper covers the funnel up to its circumference
22.Which one of the following methods will be used to separate the mixture of NaCl and sand.
A. Chromatography
B. Solvent extraction
C. Sublimation
D. Chromatography
23.One of the following substances is not used as a drying reagent in a desiccator
A. Cons. H2SO4
B. P2O5
C. Silica gel
D. Cons. H2SO4
24.Chromatography is the process which involve the distribution of a solute between
A. Two mobile phases
B. A stationary phase and mobile phase
C. Two stationary and two mobile phases
D. Two mobile phases
25.A filtration process could by very time consuming if it were into aided by a gentle suction which is developed.
A. If the paper covers the funnel upto its circumference
B. If the paper has got small sized pores in it.
C. If the stem of the funnel is large so that it dips into the filtrate
D. If the paper covers the funnel upto its circumference
26.The free expansion of the gas from high pressure towards the low pressure causes
A. Increase of temperature
B. Decrease of temperature
C. Grater number of collisions among the molecules
D. Increase of temperature
27.Under which conditions of temperature and pressure will a real gas behave most like an ideal gas.
A. Low temperature and how pressure
B. High temperature and high pressure
C. Low temperature and high pressure
D. Low temperature and how pressure
28.If we plot a graph between I/V at x-axis and pressure at Y -axis
A. a parabolic graph is obtained
B. By increasing temperature straight line move toward x axis
C. By increases temperature straight line move toward y axis.
D. a parabolic graph is obtained
29.Gases deviate from ideal behaviour at high pressure. Which of the following is correct for non-ideal behaviour of gases
A. At high pressure, the gas molecules move in one direction only
B. At high pressure, the collisions between the gas molecules are increased
C. At high pressure, the volume of the gas becomes insignificant
D. At high pressure, the gas molecules move in one direction only
30.If the number of gas molecules are doubled in a certain volume of a gas, the pressure is.
A. Decreased to half
B. Doubled
C. Increased to four time
D. Decreased to half
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