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Class XI Chemistry Mole concept and Stoichiometry 6

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Question 1

The number of atoms contained in 11.2 L of SO₂ at N.T.P. are -

Question 2

In an effusion experiment, it required 40 s for a certain number of moles of a gas of unknown molar mass to pass through a small orifice into a vacuum. Under the same conditions, 16 s were required for the same number of moles of O₂ to effuse. What is the molar mass of the unknown gas?

Question 3

20 g of an acid furnishes 0.5 moles of H₃O⁺ ions in its aqueous solution. The value of 1g eq. of the acid will be -

Question 4

A mixture of CO and CO₂ having a volume of 20 ml is mixed with x ml of oxygen and electrically sparked. The volume after explosion is (16 + x) ml under the same conditions. What would be the residual volume if 30 ml of the original mixture is treated with aqueous NaOH?

Question 5

In chemistry a number is represented in the form N*10ⁿ . this method of expressing the number is called scientific notation. What is the value of N ?

Question 6

What is the correct scientific notation for 0.00016 ?

Question 7

How many significant digits are there in 0.35 ?

Question 8

NKg^-1 is the unit of

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May 10JEE & BITSAT