Recent questions tagged class11

The Pauling electronegativity for H is

asked Jul 28, 2014 by sreemathi.v

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Which of the following statements regarding electropositive nature of elements in a period is correct?

asked Jul 28, 2014 by sreemathi.v

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Which of the following elements is most electropositive?

asked Jul 28, 2014 by sreemathi.v

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Which of the following elements never has an oxidation state +1?

asked Jul 28, 2014 by sreemathi.v

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Solve the given inequality and show the graph of the solution on number line: $ \large\frac{x}{2} <\frac{(5x-2)}{3} - \frac{(7x-3)}{5}$

asked Jul 28, 2014 by meena.p

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In the periodic table,electronegativity of elements

asked Jul 28, 2014 by sreemathi.v

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With the increase in atomic number in a period

asked Jul 28, 2014 by sreemathi.v

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Which of the following elements is expected to have maximum value of Pauling electronegativity?

asked Jul 28, 2014 by sreemathi.v

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Solve the given inequality and show the graph of the solution on number line: $ 3(1-x) <2 (x +4)$

asked Jul 28, 2014 by meena.p

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The Pauling electronegativity value of fluorine is

asked Jul 28, 2014 by sreemathi.v

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The correct order of Pauling electronegativity is

asked Jul 28, 2014 by sreemathi.v

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The electronegativity of the following elements increases in the order

asked Jul 28, 2014 by sreemathi.v

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Electron affinities of Li,Na and K follow the order

asked Jul 28, 2014 by sreemathi.v

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Solve the given inequality and show the graph of the solution on number line: $ 5x-3 < 3x -5$

asked Jul 28, 2014 by meena.p

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Electron affinities of Be,B and Al follow the order

asked Jul 28, 2014 by sreemathi.v

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Electron affinities of C,Si and Ge follow the order

asked Jul 28, 2014 by sreemathi.v

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Which of the following will have the lowest value of electron affinity?

asked Jul 28, 2014 by sreemathi.v

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Which of the following elements has the highest value of electron affinity?

asked Jul 28, 2014 by sreemathi.v

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Which of the following elements has zero electron affinity?

asked Jul 28, 2014 by sreemathi.v

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The correct order of electron affinity is

asked Jul 28, 2014 by sreemathi.v

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The element with atomic number 105 is known as

asked Jul 28, 2014 by sreemathi.v

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The number of water of crystallization in Borax is

asked Jul 27, 2014 by thanvigandhi_1

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In Borax, the number of -OH group attached to boron atoms is

asked Jul 27, 2014 by thanvigandhi_1

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In the reaction $H_3BO_3$$ _{\overrightarrow{375k}} A$$ _{\overrightarrow{475k}} B$$ _{\overrightarrow{red\: heat}} C$ The compounds A, B and C respectively are

asked Jul 27, 2014 by thanvigandhi_1

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Borax has the molecular formula

asked Jul 27, 2014 by thanvigandhi_1

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Which of the following statement is correct ?

asked Jul 27, 2014 by thanvigandhi_1

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Which of the following statement is not correct ?

asked Jul 27, 2014 by thanvigandhi_1

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Which of the following statement is incorrect ?

asked Jul 27, 2014 by thanvigandhi_1

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Heating of diborane with excess of ammonia to a high temperature yields

asked Jul 27, 2014 by thanvigandhi_1

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Chrome alum is

asked Jul 26, 2014 by thanvigandhi_1

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Heating of $Al_2(SO_4)_3$ gives

asked Jul 26, 2014 by thanvigandhi_1

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Which of the following alloys does not contain aluminium ?

asked Jul 26, 2014 by thanvigandhi_1

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Show that the statement "If $x$ is an integer and $x^2$ is even, then $x$ is also even." using contrapositive method.

asked Jul 26, 2014 by rvidyagovindarajan_1

1 answer

Show that the statement "For any real numbers $a$ and $b$, $a^2=b^2$ implies that $a=b$" is not true by giving counter example.

asked Jul 26, 2014 by rvidyagovindarajan_1

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Show that the statement " If $x$ is real number such that $x^3+4x=0$, then $x$ is 0." is true using contra positive method.

asked Jul 26, 2014 by rvidyagovindarajan_1

1 answer

Show that the statement " If $x$ is real number such that $x^3+4x=0$, then $x$ is 0." is true using contradiction method.

asked Jul 26, 2014 by rvidyagovindarajan_1

1 answer

Solve the given inequality and show the graph of the solution on number line: $ 3x-2 <2 x +1$

asked Jul 26, 2014 by meena.p

1 answer

Solve the inequality for real $x: \large\frac{(2x-1)}{3} \geq \frac{(3x-2)}{4} -\frac{(2-x)}{5}$

asked Jul 26, 2014 by meena.p

1 answer

Solve the inequality for real $x: \large\frac{x}{4} < \frac{(5x-2)}{3} - \frac{(7x-3)}{5}$

asked Jul 26, 2014 by meena.p

1 answer

Solve the given inequalities for real $x: 37 -(3x+5) \geq 9x -8 (x-3)$

asked Jul 25, 2014 by meena.p

1 answer

Solve the inequality for real $x: 2(2x+3) -10 < 6(x-2)$

asked Jul 25, 2014 by meena.p

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Solve the inequality for real $x: \large\frac{1}{2} \bigg(\large\frac{3x}{5} +4 \bigg) $$ \geq \large\frac{1}{3} $$(x-6)$

asked Jul 25, 2014 by meena.p

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Solve the given inequality for real $x: \large\frac{3(x-2)}{5} \leq \large\frac{5(2-x)} {3}$

asked Jul 25, 2014 by meena.p

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Which of the following statements regarding the structure aluminium chloride is correct ?

asked Jul 25, 2014 by thanvigandhi_1

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The chief ore for the extraction of aluminium is

asked Jul 25, 2014 by thanvigandhi_1

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Solve the inequality for real $x, \large\frac{x}{3} > \frac{x}{2} $$+1$

asked Jul 25, 2014 by meena.p

1 answer

Which of the following minerals does not contain aluminium ?

asked Jul 25, 2014 by thanvigandhi_1

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Solve the given inequality for real $x. x +\large\frac{x}{2} +\frac{x}{3} $$ <11$

asked Jul 25, 2014 by meena.p

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Show that the statement " If $x$ is real number such that $x^3+4x=0$, then $x$ is 0." is true using direct method.

asked Jul 25, 2014 by rvidyagovindarajan_1

1 answer

The elements $_{30}Zn,_{48}Cd$ and $_{80}Hg$ belong to

asked Jul 25, 2014 by sreemathi.v

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