Bakelite is made from phenol and formaldehyde. The initial reaction between them is the example of

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ALOK_RAJ Asked Nov 28, 2023

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Rishav Raj Asked Apr 22, 2022

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फॉर्मेल्डिहाइड का प्रयोग निम्नलिखित में से किसमें किया जाता है? Formaldehyde Ka Prayog Nimnalikhit Mein Se Kismen Kiya Jata Hai?

Rishav Raj Asked Apr 22, 2022

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Rishav Raj Asked Feb 4, 2022

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बैकेलाइट किसके संघनन से बनता है? Bakelite Kiske Sanghanan Se Banta Hai?

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ऐल्कोहॉल एवं फीनॉल में अंतर स्पष्ट करें। Alcohol Aur Phenol Mein Antar Spasht Karen.

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Rupa Verma Asked Apr 4, 2022

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फिनोल को किस अम्ल के रूप में जाना जाता है? Phenol Ko Kis Aml Ke Roop Mein Jana Jata Hain?

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ALOK_RAJ Asked Aug 26, 2023

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In the following reaction, 3A(g) + B(g) ⇌ 2C(g) + D(g), Initial moles of B is double of A. At equilibrium, moles of A and C are equal. Hence % dissociation of B is :

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When white phosphorus reacts with caustic soda, the products are PH3 and NaH2PO2. This reaction is an example of :

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ALOK_RAJ Asked Aug 4, 2023

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In a reversible chemical reaction having two reactants in equilibrium with one product, if the initial concentration of both the reactants is doubled, then the equilibrium constant will :

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When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is —

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Distinguish between the terms homopolymer and copolymer and give an example of each.

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CH3-CO-CH3 (g) $\rightleftharpoons$ CH3-CH3 (g)+ CO (g) Initial pressure of CH3COCH3 is 100 mm. When equilibrium is set up, mole fraction of CO (g) is 1 / 3. Hence value of K_p for given reaction is :

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What weight of CO is required to form Re2(CO)_{10} from 2.42 g of Re2O7 according to the given unbalanced reaction?

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Sulphur exist in different allotropic forms like S2, S6 and S8 etc. If equal moles of these three forms are taken in separate containers, then the ratio of number of atoms present in them respectively is

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In a reaction A (g) + 2 B (g) $\rightleftharpoons$ 2 C (g), 2 moles of ' $A ^{\prime}, 3$ moles of 'B' and 1 mole of 'C' are placed in a 2 L flask and the equilibrium concentration of 'C' is 1 mol / L.

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The number of moles of Phosphoric acid H3PO4 that can be produced, by allowing 0.8 moles of H2, 0.9 moles of P4 and 1 mole of O2 to combine according to the given unbalanced reaction, is :

ALOK_RAJ Asked Aug 18, 2023

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The rate of first-order reaction is $0.04 {~mol} {~L}^{-1} {~s}^{-1}$ at $10 {s}$ and $0.03 {mol} {~L}^{-1} {~s}^{-1}$ at $20 {~s}$ after initiation of the reaction. The half-life period of the reaction is

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Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below.

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A piece of a metal weighs between 0.5g and 0.6g. When dissolved in dilute H2SO4, 196 mL of hydrogen gas is evolved at S.T.P. If the correct atomic weight of the metal is 65.2, calculate exact weight of metal dissolved in acid.

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The equivalent conductance of NaCl at concentration C and at infinite dilution are $\lambda_C$ and $\lambda_{\infty}$, respectively. The correct relationship between $\lambda_C$ and $\lambda_{\infty}$ is given as (where, the constant B is positive)

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For the cell prepared from electrode A and B, electrode $A : \frac{ Cr _{2} O _{7}^{2-}}{ Cr ^{3+}}, E _{\text {red. }}^{0}=+1.33 V$ and electrode $B$ : $\frac{F_{e^{3+}}^{F e^{2+}}, E_{\text {red. }}^{0}}{}=0.77 V$, which of the following statement is not correct?

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The pH of pure water at $25^{\circ} {C}$ and $35^{\circ} {C}$ are 7 and 6 respectively. The heat of formation of water from H+ and OH- is

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A resistance of $50 \Omega$ is registered when two electrodes are suspended into a beaker containing a dilute solution of a strong electrolyte such that exactly half of the them are submerged into solution.

ALOK_RAJ Asked Oct 18, 2023

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The wave, which travels in a strength line and cannot bend around the corner is called transverse wave. Which one of the following is an example of transverse wave?

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In Haber process, 30 L. of dihydrogen and 30 L of dinitrogen were taken for reaction which yielded 50% of the expected product.

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If 30 ml of H2 and 20 mL of O2 react to form water, what will be left at the end of the reaction?

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For the reaction 2P + Q →3R, 12 mole of P and 5 mole of Q will produce —

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An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely neutralize 10 mL of this solution is

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Bakelite is made from phenol and formaldehyde. The initial reaction between them is the example of

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