Chemistry XII - Some Basic Concepts in Chemistry 06

Question : 1

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10 mL of each 0.1 M BaCl₂ and Na₂SO₄ are mixed. Which will have the highest concentration in the solution?

Options:

	BaCl2
	Na2SO4
	BaSO4
	NaCl

Solution :

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Question : 2

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Options:

	1 M
	4 M
	55.5 M
	Cannot be calculated

Solution :

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Question : 3

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A 0.5 M NaOH solution has density 1.02 gmL–¹. Its molality is

Options:

	0.51 m
	0.49 m
	0.50 m
	1.0 m

Solution :

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Question : 4

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20 mL of 0.1 M, 30 mL of 0.2 M and 30 mL of 0.3 M solutions of oxalic acid are mixed and the volume is made 100 mL. The molarity of resulting solution is

Options:

	0.21 M
	8.51 M
	5.60 M
	0.17 M

Solution :

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Question : 5

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Mole fraction of urea in 11.11 molal aqueous solution is

Options:

	0.1
	0.17
	0.2
	0.37

Solution :

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Question : 6

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How much of NaOH is required to neutralize 1500 cm³ of 0.1 N HCl? (Na = 23)

Options:

	40 g
	4 g
	6 g
	60 g

Solution :

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Question : 7

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Options:

	0.0293 M
	0.0338 M
	0.0126 M
	0.0198 M

Solution :

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Question : 8

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The density of methanol is 0.793 kg L–¹.Then its volume needed for making 2.5 L of its 0.25 M solution will be

Options:

	26.40 mL
	23.28 mL
	24.45 mL
	25.22 mL

Solution :

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Question : 9

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100 mL decinormal HCl is mixed to 100 mL seminormal H₂SO₄ solution. Then, the normality of the resulting mixture is

Options:

	0.3 N
	0.2 N
	0.4 N
	0.8 N

Solution :

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Question : 10

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If 4 g of NaOH dissolves in 36 g of H₂O, then the mole fraction of each component in the solution and the molarity of the solution are

Options:

	A
	B
	C
	D

Solution :