One moleof crbon -12 has mass
\r\n","choices":[{"text":"0.012 kg
\r\n","value":"A"},{"text":"1 kg
\r\n","value":"B"},{"text":"0.0224 kg
\r\n","value":"C"},{"text":"12 kg
\r\n","value":"D"},{"value":"E"}]},{"id":1066087,"question":"The number of moles of CO2 whci contain 8 g of oxygen.
\r\n","choices":[{"text":"0.25
\r\n","value":"A"},{"text":"0.5
\r\n","value":"B"},{"text":"1.0
\r\n","value":"C"},{"text":"1.50
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066086,"question":"The mass of one mole of electron is
\r\n","choices":[{"text":"1.088 mg
\r\n","value":"A"},{"text":"0.55 mg
\r\n","value":"B"},{"text":"0.184 mg
\r\n","value":"C"},{"text":"1.67 mg
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066085,"question":"A gas has a density of 1.43 g dm3 at STP. What is the molar mass of the gas?
\r\n","choices":[{"text":"14.3 g mol-1
\r\n","value":"A"},{"text":"32.0 g mol-1
\r\n","value":"B"},{"text":"22.4 g mol-1
\r\n","value":"C"},{"text":"64.0 g mol-1
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066084,"question":"The numebr of molesof CO2 which contain 8 g of oxygen
\r\n","choices":[{"text":"0.25
\r\n","value":"A"},{"text":"0.5
\r\n","value":"B"},{"text":"1.0
\r\n","value":"C"},{"text":"1.50
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066083,"question":"The mass of one mole of electron is
\r\n","choices":[{"text":"0.55 mg
\r\n","value":"A"},{"text":"1.088 mg
\r\n","value":"B"},{"text":"0.184 mg
\r\n","value":"C"},{"text":"1.67 mg
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066082,"question":"A sample of nitrogen gas has a mass of 14.0 g,How many nitrogen atoms are present in the this sample
\r\n","choices":[{"text":"3.01 x 10 25 atoms
\r\n","value":"A"},{"text":"6.02 x 10 23 atoms
\r\n","value":"B"},{"text":"12.01 x 10 25 atoms
\r\n","value":"C"},{"text":"2.40 x 10 25 atoms
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066081,"question":"A solution contain 10.0 g of an unknow s solute in 250 cm3 of solutin. If the molar concentration of the solutin is 0.20 mol dm-3 what is the molar mass of the scolute.
\r\n","choices":[{"text":"200 g mol -1
\r\n","value":"A"},{"text":"50 g mol -1
\r\n","value":"B"},{"text":"100 gmol -1
\r\n","value":"C"},{"text":"400 g mol-1
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066080,"question":"Volume of S.T.P of 22g of O2 is same as that of
\r\n","choices":[{"text":"2 g of hydrogen
\r\n","value":"A"},{"text":"8.5 g of NH3
\r\n","value":"B"},{"text":"64 g of gaseous SO2
\r\n","value":"C"},{"text":"7 g of CO2
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066079,"question":"A solution contains 4.0 g of sodium hydroxide in 250 cm3 of solution. What is the molar concentration of this solution
\r\n","choices":[{"text":"0.10 mol dm-3
\r\n","value":"A"},{"text":"0.20 mol dm-3
\r\n","value":"B"},{"text":"0.40 mol dm-3
\r\n","value":"C"},{"text":"0.80 mol dm-3
\r\n","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066078,"question":"A container holds 0,5 moles of an ideal gas at STP, What is the volume of the gas in dm3
\r\n","choices":[{"text":"11.2 dm3
\r\n","value":"A"},{"text":"22.4 dm3
\r\n","value":"B"},{"text":"44.8 dm3
\r\n","value":"C"},{"text":"12.2 dm3
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066077,"question":"4.0 g of NaOH (molar mass 40 g mol-1) contains same numebr of sodium ions as are present in
\r\n","choices":[{"text":"5.3 g of Na2CO 3
\r\n","value":"A"},{"text":"58.5 g of NaCl
\r\n","value":"B"},{"text":"76 g Na2 SO4
\r\n","value":"C"},{"text":"85 g of NaNO3
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066075,"question":"Which of the following contains same number of particles as present in 12 g of carbon
\r\n","choices":[{"text":"28 f od ieon (Atomic mass of Fe= 56)
\r\n","value":"A"},{"text":"48 g of magnesium (Atomic mass of Mg =24)
\r\n","value":"B"},{"text":"32 g of S Molecules (Atomic mass S= 32)
\r\n","value":"C"},{"text":"44 g of carbon dioxide (molar mass of CO2= 44)
\r\n","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":1066074,"question":"Which one of the followng gases will have maximum volume at STP.
\r\n","choices":[{"text":"88 g of N2O
\r\n","value":"A"},{"text":"22 g of CO2
\r\n","value":"B"},{"text":"28 g of CO
\r\n","value":"C"},{"text":"28 g of N2
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066073,"question":"Which one of the followng has maximum mass.
\r\n","choices":[{"text":"0.5 mol of N2
\r\n","value":"A"},{"text":"0.5 Mol of NH3
\r\n","value":"B"},{"text":"0.5 mol of He
\r\n","value":"C"},{"text":"0.5 mol of H2
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066072,"question":"Which one of the following Statments is incorrect
\r\n","choices":[{"text":"One mole of nitrogen gas contains Avogadro's numebr of moleclues
\r\n","value":"A"},{"text":"One mole of ozone gas contains avogadr's number of molecules
\r\n","value":"B"},{"text":"One mole of ozone contains avogadro's number of O atom
\r\n","value":"C"},{"text":"One moleof hydrogen gas contains Avogadro's numebrof molecules
\r\n","value":"D"},{"value":"E"}],"correctAnswer":3}]