Tags Chemistry

Chemistry

Get insights from 6.9k questions on Chemistry, answered by students, alumni, and experts. You may also ask and answer any question you like about Chemistry

Follow Ask Question

6.9k

Questions

Discussions

Active Users

Followers

New answer posted

a year ago

Chemistry Class 12th

Match the following drugs with their therapeutic action:
(I) Cimetidine structure
(II) Iproniazid structure
(III) Penicillin structure (general)
(IV) Terfenadine structure

(a) Antidepressant
(b) Antibiotic
(c) Antihistamine
(d) Antacid
(e) Analgesic

0 Follower 3 Views

Raj Pandey

Contributor-Level 9

(1) Cimetidine $E = P h - C H - {C H}_{3}$ $_{}$ Antacid

(2) Iproniazid ${C H}_{3}$ $_{}$ Antidepressant

(3) Penicillin $\to$ Antibiotic

(4) Terfenadine $\to$ Antihistamines

0 0

New answer posted

a year ago

Chemistry Class 12th

Three isomers A, B and C (mol. formula C?H?O?) gives the following results:
B or C →Decarboxylation→ D(C?H?)
A →Decarboxylation→ E(an isomer of D)
Both D and E are non-resolvable.
D or E →H?/KMnO?→ Benzoic acid
B is more reactive than C towards decarboxylation reaction.
A, B, C respectively are:

0 Follower 21 Views

Raj Pandey

Contributor-Level 9

0 0

New answer posted

a year ago

Chemistry Chemistry Coordination Compounds

The d-electron configuration of [Fe(H?O)?(NO)]²? and K?[Cr(CN)?] respectively are:

0 Follower 7 Views

Raj Pandey

Contributor-Level 9

In ${[F e ? {(H_{2} O)}_{5} (N O)]}^{2 +}$

${F e}^{+ 1} (3 d^{7})$

In ${[{C r}^{+ 3} (C N)_{6}]}^{3 -}$

${C r}^{+ 3} (3 d^{3})$

0 0

New answer posted

a year ago

Chemistry Class 12th

Complex A has a composition of H?O?Cl?Cr. It has green colour. A 0.2M solution of complex when treated with excess of AgNO? gave 57.45gm of white precipitate. The formula of the complex would be: [Given: at mass Cr = 52amu, Cl = 35.5amu, Ag = 107.8amu ]

0 Follower 5 Views

Raj Pandey

Contributor-Level 9

0.2 mole gives $\to 0.4$ mole of $A g C l$ (moles of $A g C l = \frac{57.45}{143} = 0.4$ $\frac{}{}$ )

1 mole complex gives $\to \frac{0.4}{0.2} = 2$ $\frac{}{}$ moles $A g C l$

The correct answer should be $2^{nd}$ $^{}$ option.

0 0

New answer posted

a year ago

Chemistry Chemistry Classification of Elements and Periodicity in Properties

The five successive ionization enthalpies of an element are 710, 1414, 2550, 28124 and 33845 kJ mol?¹. How many moles of H?SO? will be needed to react completely with 4 moles of the metal hydroxide?

0 Follower 5 Views

Raj Pandey

Contributor-Level 9

As the difference in $3^{rd}$ $^{}$ and $4^{th}$ $^{}$ ionisation energy is high so atom contains 3 valence electrons. Hence, valency of the atom is 3 and the metal is trivalent. 4 mole of trivalent metal hydroxide will react with 6 mole of $H_{2} {S O}_{4}$ $_{}_{}$ , $(2 M (O H)_{3} + 3 H_{2} {S O}_{4} ? M_{2} {({S O}_{4})}_{3} + 6 H_{2} O)$

0 0

New answer posted

a year ago

Chemistry Chemistry Chemical Kinetics

For the reaction A + 2B → 3C + D, which of the following expression represents the rate of formation of C, in terms of rate of decomposition of A :

0 Follower 7 Views

Raj Pandey

Contributor-Level 9

The rate of formation of $C$ is three times the rate of decomposition of $A$ .

0 0

New answer posted

a year ago

Chemistry Class 12th

Arrange the following in increasing order of reactivity towards AgNO? solution:

(I) 1-chloro-2-phenylethane
(II) (Dichloromethyl)cyclopropane
(III) 1-chloro-1-cyclohexylethane
(IV) (1-chloroethyl)benzene

0 Follower 1 View

Raj Pandey

Contributor-Level 9

The reactivity of $S_{N} 1$ $_{}$ reaction depends upon stability of carbocation.

0 0

New answer posted

a year ago

Chemistry Redox Reactions

Volume strength of original peroxide solution is 16.8 V. Determine the molarity and normality of peroxide solution respectively:

0 Follower 1 View

Raj Pandey

Contributor-Level 9

Normality $= \frac{Volume strength}{5.6} = \frac{16.8}{5.6} = 3$ $\frac{}{} \frac{}{}$

Molarity $= \frac{Normality}{n - factor} = \frac{3}{2} = 1.5$

0 0

New answer posted

a year ago

Chemistry Chemistry Hydrocarbon

The compound 'A' in the following Reaction is:
A →(1) O?, (2) Zn/H?O→ B + C
B →dil. KOH→ CH?-CH(OH)-CH?-CHO →HCN→ D
C →conc. KOH→ Benzyl alcohol + salt of Benzoic Acid
D →H?O?, Δ→ E

0 Follower 14 Views