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a year ago

Chemistry Chemistry NCERT Exemplar Solutions Class 12th Chapter Sixteen

How many of the following drugs is/are example(s) of broad spectrum antibiotics?

Ofloxacin, Penicillin G, Terpineol, Salvarsan.

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alok kumar singh

Contributor-Level 10

Ofloxacin is the only broad spectrum antibiotic given in the question.

Pencillin – G is narrow spectrum antibiotic.

Salvarsan is mainly active against spirochete, a bacteria that causes syphilis.

Terpineol is an antiseptic.

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a year ago

Chemistry Chemistry NCERT Exemplar Solutions Class 12th Chapter One

Stearic acid and polyethylene glycol react to form which one of the following soap/s etergents?

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Vishal Baghel

Contributor-Level 10

Kindly consider the following figure

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a year ago

Chemistry Chemistry NCERT Exemplar Solutions Class 12th Chapter Ten

A 100 mL solution of CH₃CH₂MgBr on treatment with methanol produces 2.24 mL of a gas at STP. The weight of gas produced is __________ mg. [nearest integer]

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alok kumar singh

Contributor-Level 10

Moles of C₂H₆ = $\frac{2.24 * 1 0^{- 3}}{22.4} = 1 0^{- 4}$

Weight of C₂H₆ = 10^-4 * 30 = 3 mg

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a year ago

Chemistry Chemistry NCERT Exemplar Solutions Class 12th Chapter One

The correct stability order of the following diazonium salt is

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Vishal Baghel

Contributor-Level 10

Electron donating group increases stability of diazonium salt. Whereas electron with drawing group decrease it.

-OCH₃ (+M), -NO₂ & -CN (-M)

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Chemistry Chemistry NCERT Exemplar Solutions Class 12th Chapter Twelve

Total number of isomers (including stereoisomers) obtained on monochlorination of methylcyclohexane is_______________.

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alok kumar singh

Contributor-Level 10

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a year ago

Chemistry Chemistry NCERT Exemplar Solutions Class 12th Chapter One

The major product of the following reaction is

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Vishal Baghel

Contributor-Level 10

Birch reduction takes place of carbon connected with electron withdrawing group (-NO₂)

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Chemistry Chemistry NCERT Exemplar Solutions Class 12th Chapter Eight

The spin-only magnetic moment value of the compound with strongest oxidizing ability among MnF₄, MnF₃ and MnF₂ is_________B.M [nearest integer]

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alok kumar singh

Contributor-Level 10

$\overset{+ 4}{M n F_{4}}$ $\overset{+ 3}{M n F_{3}}$

E.C = [Ar] 3d³ [Ar]3d⁴

$\begin{matrix} \overset{+ 2}{M n F_{2}} & [A r] 3 d^{5} \end{matrix} [\begin{array}{l} E_{M n^{3 +} | M n^{2 +}}^{0} = 1.57 V \\ E_{M n^{4 +} | M n^{2 +}}^{0} = 1.27 V \end{array}]$