Download App

STD 12 -8.1. Aldehydes and ketones — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 -8.1. Aldehydes and ketones4 Marks
MCQ
$1-$ Alkyne and $2-$ alkyne can be destinguished by
  • ✓
    Tollen's reagent
  • B
    Baeyer's regent
  • C
    $Br_2 / CCl_4$
  • D
    Hydrogenation over $Ni$
✓

Answer

Correct option: A.
Tollen's reagent
a
${\text{R}} - {\text{C}} \equiv {\text{C}} - {\text{H}}$ $\xrightarrow{{{\text{A}}{{\text{g}}^ + }}}$  ${\text{R}} - \mathop {\text{C}}\limits^{\ddot \Theta }  \equiv {\text{CA}}{{\text{g}}^ \oplus }$ [silver ppt]

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Identify the homoleptic complexes with odd number of d electrons in the central metal.
(A) $\left[ FeO _4\right]^{2-}$
(B) $\left[ Fe ( CN )_6\right]^{3-}$
(C) $\left[ Fe ( CN )_5 NO \right]^{2-}$
(D) $\left[ CoCl _4\right]^{2-}$
(E) $\left[ Co \left( H _2 O \right)_3 F_3\right]$
Choose the correct answer from the options given below :
→
Which compound is not a monobasic acid ?
→
For the reaction :

$CH_{4(g)} + 2O_{2(g)} \rightleftharpoons CO_{2(g)} + 2H_2O_{(l)},$

$\Delta H_r = -170.8 \, k\,J\,mol^{-1}.$ which of the following statements is not true ?

→
$K_f$ for water is $1.86\, K\, kg\, mol^{-1} .$ If your automobile radiator holds $1.0\, kg$ of water, .......... $gm$ of ethylene glycol $(C_2H_6O_2)$ must you add to get the freezing point of the solution lowered to $-2.8\,^o C$.
→
Which acid will not form hydrocarbon
→
Given below are two statements : One is labelled as Assertion $A$ and the other is labelled as Reason $R$

Assertion $A$ : Thin layer chromatography is an adsorption chromatography.

Reason $R$: A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent. In the light of the above statements, choose the correct answer from the options given below.

→
The orbital angular momentum of $3p$ electron is
→
$1\ mol$ of $N{H_3}\left( {\gamma  = 4/3} \right)$ gas at $27\,^oC$ is expanded under reversible adiabatic condition to make volume $8\ times$ . Calculate work done.....$cal$
→
When a solid melts reversibly
→
The Henry's law constant for the solubility of $\mathrm{N}_2$ gas in water at $298 \mathrm{~K}$ is $1.0 \times 10^5 \mathrm{~atm}$. The mole fraction of $\mathrm{N}_2$ in air is $0.8$ . The number of moles of $\mathrm{N}_2$ from air dissolved in $10$ moles of water at $298 \mathrm{~K}$ and $5 \mathrm{~atm}$ pressure is
→