Untitled Quiz

In what way is equilibrium constant for the forward reaction related to that of the reverse reaction?

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The 3rd term of an A.P is 4x - 2y and the 9th term is 10x - 8y. Find the common difference.

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Two elements, X and Y, have atomic numbers 8 and 13 respectively. The formula for the possible compound found between X and Y is

• Y2X3

• XY2

• X3Y2

• X2Y3

An alkanoic acid has a molecular mass of 88. Its molecular formula is

• C4H9COOH

• C5H11COOH

• C3H5COOH

• C3H7COOH

3 g of a mixture of CaO and CaCO3 was heated to a constant mass. If 0.44 g of CO2 was liberated, calculate the percentage of CaO in the mixture.

• 33.3%

• 50%

• 66.67%

• 25%

In electrolysis, the chemical reaction which takes place at the anode is

• dissociation

• hydrolysis

• oxidation

• reduction

Evaluate (1/2 - 1/4 + 1/8 - 1/16 + ...) - 1

• A. 2/3

• B. zero

• C. -2/3

• D. -1

In the electrolysis of brine, it is essential to prevent the mixing of the products because

• sodium and chlorine readily combine

• chlorine gives a green coloration

• chlorine readily recombines with sodium hydroxide

• sodium hydroxide forms a carbonate in the presence of air and chlorine

When chlorine water is exposed to sunlight, the gas evolved is

• Cl2

• O2

• HCl

• CO2

An increase in temperature causes an increase in the pressure of a gas in a fixed volume due to an increase in the

• Number of molecules of the gas

• Density of the gas molecules

• Number of collisions between the gas molecules

• Number of collisions between the gas molecules and the walls of the container