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Class XI Chemistry States of Matter 7

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Question 1

A metallic element crystallizes into a lattice containing a sequence of layers of ABABAB... Any packing of spheres leaves out voids in the lattice. What percentage by volume of this lattice is empty space ?

Question 2

Which of the following is the correct order of boiling points of the following solutions?
(I) 0.15 M HCl
(II) 0.4 M glucose solution
(III) 0.15 M CaCl₂ solution
(IV) 0.15 M urea solution

Question 3

A compound formed by elements A and B crystallizes in cubic structure where A atoms are at the corners of a cube and B atoms are at the face center. The formula of the compound is:

Question 4

In a mixture of A and B, components show negative deviation when:

Question 5

The interstitial hole is called tetrahedral because

Question 6

For a liquid normal boiling point is –173^oC then at 2 atm pressure it's boiling point should be nearly (H_vap = 200cal/mole, R = 2 cal/mol-K, ln2 = 0.7)

Question 7

When 20 g naphthoic acid (C₁₁H₈O₂) is dissolved in 50 g of benzene [K_f = 1.72 K kg mol^–1] freezing point depression of 2 K is observed. The Van't Hoff factor (i) is:

Question 8

Which of the following is not an assumption of the kinetic theory of gases?

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Sep 14JEE & BITSAT