1The mass of an atom (element) compared with the mass of one atom of C-12 is called,aOne molebGram atomic masscAtomic numberdRelative atomic massShow answer
2Which of the following is not true for a mole?aIt is a counting unitbIt is the gram atomic or gram formula mass of a substancecIt contains 6.023×10²³ particlesdIt contains different number of particles for different substancesShow answer
5What will be the values of temperature and pressure at standard condition (STP),a100°C, 1 atmb298K, 1 atmc273K, 760mm Hgd0°C, 760cm HgShow answer
8Given the equation: CO₂(g) + C(s) → 2CO(g). Which of the following equivalences is not correct for the reaction,a1mol CO₂ ≡ 2 mol COb1mol C ≡ 56g COc44g CO₂ ≡ 28g COd44g CO₂ ≡ 12g CShow answer
9A limiting reactant is oneaWhich is present in maximum amountbWhich produces minimum No. of moles of productcWhich produces maximum No. of moles of productdDoes not affect the amount of productShow answer
10Efficiency of chemical reaction can be checked by calculatingaActual yieldbTheoretical YieldcPercentage YielddAmount of the reactant unusedShow answer
11Actual yield will reach the ideal (theoretical) value if the % yield of the reaction isa0.1b0.5c0.9d1Show answer
12The maximum No. of moles are present ina11.2 dm³ of H₂ gas at STPb44.8 dm³ of N₂ gas at STPc67.2 dm³ of CO₂ gas at STPd22.4 dm³ of O₂ gas at STPShow answer
14Actual yield will reach the ideal (theoretical) value if the % yield of the reaction isa10%b50%c90%d100%Show answer
