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Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Four

Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?

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Vishal Baghel

Contributor-Level 10

BCl₃ – electron deficient molecule

SF₆ – expanded octet molecule

NO – odd electron bond containing molecule

H₂SO₄ – expanded octet molecule

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Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Four

Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?

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Class 12th Maths NCERT Exemplar Solutions Class 12th Chapter Ten

The circle passing through the intersection of the circles, $x^{2} + y^{2} - 6 x = 0$ and $x^{2} + y^{2} - 4 y$ $= 0$ , having its centre on the line, $2 x - 3 y + 12 = 0$ , also passes through the point:

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Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Ten

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Class 12th Maths NCERT Exemplar Solutions Class 12th Chapter Five

Let $λ \neq 0$ be in R. If $α$ and $β$ are the roots of the equation, $x^{2} - x + 2 λ = 0$ and $α$ and $γ$ are the roots of the equation, $3 x^{2} - 10 x + 27 λ = 0$ , then $\frac{β γ}{λ}$ is equal to:

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alok kumar singh

Contributor-Level 10

$f (x) = \overset{?}{a} \cdot (\overset{?}{b} * \overset{?}{c}) = |\begin{matrix} x & - 2 & 3 \\ - 2 & x & - 1 \\ 7 & - 2 & x \end{matrix}|$

$= x^{3} - 27 x + 26$

$f^{'} (x) = 3 x^{2} - 27 = 0 \Rightarrow x = \pm 3$ and $f^{''} (- 3) < 0$

$\Rightarrow$ local maxima at $x = x_{0} = - 3$

Thus, $\overset{?}{a} = - 3 \hat{i} - 2 \hat{j} + 3 \hat{k}, \overset{?}{b} = 2 \hat{i} - 3 \hat{j} - \hat{k}$ , and $\overset{?}{c} = 7 \hat{i} - 2 \hat{j} - 3 \hat{k}$

$\Rightarrow \overset{?}{a} \cdot \overset{?}{b} + \overset{?}{b} \cdot \overset{?}{c} + \overset{?}{c} \cdot \overset{?}{a} = 9 - 5 - 26 = - 22$

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Class 12th Maths NCERT Exemplar Solutions Class 12th Chapter Five

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Class 12th Maths NCERT Exemplar Solutions Class 12th Chapter Five

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Class 12th Mahendra Institute of Management and Technical Studies

Does Mahendra Institute of Management and Technical Studies accept Class 12th marks?

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Parul Shukla

Contributor-Level 10

Yes, MIMTS accepts Class 12 scores for UG course admission. The college offers three courses, i.e., BSc, BCom and BBA. The selection criteria are merit-based. For BSc and BCom courses, candidates are selected for admission according to Directorate of Higher Education (DHE) Government of Odisha through Student Academic Management System (SAMS).

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Class 12th Chemistry

13.3 Account for the following:

(i) pKb of aniline is more than that of methylamine.

(ii) Ethylamine is soluble in water whereas aniline is not.

(iii) Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.

(iv) Although amino group is o– and p– directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.

(v) Aniline does not undergo Friedel-Crafts reaction.

(vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines.

(vii) Gabriel phthalimide synthesis is pre

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a year ago

Class 12th Chemistry

13.3 Account for the following:

(i) pKb of aniline is more than that of methylamine.

(ii) Ethylamine is soluble in water whereas aniline is not.

(iii) Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.

(iv) Although amino group is o– and p– directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.

(v) Aniline does not undergo Friedel-Crafts reaction.

(vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines.

(vii) Gabriel phthalimide synthesis is pre

...more

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