The atoms of four elements are represented as 20Q, 16R, 10S and 8T Which of the elements would be unreactive?
A. Q B. R C. S D. T Correct Answer: Option C C. SAn element Z has a combining power of 3. Which of the following formulae is correct of its compounds?
A. ZSO3 B. Z3CI2 C. Z2O3 D. ZS3 Correct Answer: Option C C. Z2O3Equal amounts of marble chips are reacted separately with 100cm3 of hydrochloric acid of different concentrations . if all the marble chips reacted, which of the following remained the same in each case?
A. Average rate of evolution of gas B. Total mass of gas evolved during the reaction C. Time taken for the reaction to reach completion D. lnitial reaction rates Correct Answer: Option B B. Total mass of gas evolved during the...What will happen if more heat is applied to the following system at equilibrium? X2(g) + 3Y2(g) ⇌ 2XY3(g); ∆H =-kJmol -1
A. the yield of XY3 will decompose B. more of XY3 will decompose C. More of X2 will react D. the forward reaction will go to completion Correct Answer: Option B B. more of XY3 will decomposeProducts
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