The average molecular wt of a mixture of gas containing nitrogen and carbon dioxide is 36. The mixture contain 280 gm of nitrogen, therefore, the amount of CO2 present in the mixture is - (a) 440 gm (c) 0.1mole (b) 44 gm (d) 880 gm Average formula weight of a mixture of 5.85 gram NaCl and 14.90 gram KCl is - (а) 66.5 (c) 58.5 (b) 74.5 (d) 69.17 If average molecular wt. of air is 29, then assuming N2 and O2 gases are there which options are correct regarding composition of air: (i) 75 % by mass of N2 (ii) 75% by moles N2 (iii) 72.41% by mass of N2 (a) only (i) is correct (c) (ii) & (iii) are correct (d) (i) & (ii) are correct (b) only (ii) is correct

Derive the equation meter: Q: = π-4 HINT: You're told balance (i.e. Bernoulli equation) D²2/2 2.(P₁-P₂) p|1 - for volumetric flow rate through the venturi that it comes from "mass balance and mechanical energy

World War II aircraft had instruments with glowing radium-painted dials. The activity of one such instrument was 2.0 ✕ 105 Bq when new. (a) What mass (in µg) of 226Ra was present? (b) After some years, the phosphors on the dials deteriorated chemically, but the radium did not escape. What is the activity (in Bq) of this instrument 52.0 years after it was made?

2.1 4 (a) Gas oil (diesel), gasoline (petrol), kerosine (paraffin) and naphtha are fractions obtained from crude oil. Write the fractions gas oil, gasoline and kerosine in order of increasing boiling temperature and give one specific use for each of the fuels, gas oil and kerosine. Order.. Use for gas oil... Use for kerosine..... ‒‒‒‒‒‒‒‒‒‒‒‒‒ 2.2 5. (a) State the technique used to separate Crude Oil into its various fractions (b) Explain how the different fractions are obtained by this process.