Grignard Reagents
Trending Questions
Q. 44.P4+3NaOH+ 3H2O→ PH3+ 3NaH2PO2 The equivalent mass of P4 in the above reaction is(M molecular weight of P4)- •M/3 •M/12 •3M/2 •M
Q. A sample od dolomite contained 45% of CaCO_{}, 40% of MgCO_3 and 15% of clay. Calculate the mass of sulphuric acid of 30% strength requires to react completely with 10g of the sample.
Q. In methyl alcohol the hybridisation of oxygen is sp3 while in phenol it is is sp2 why this is so ?
Q. 70. When 4.2g NaHCO_3 reacts the 10g acetic acid, CO_2 formed is 2.3g and mass of solution is 12g. Show that these data confirm the law of conservation of mass
Q. What mass of caco3 is required to react completely with 25 ml of 0.75 M HCl
Q. Furan is heterocyclic organic compound or homocyclic organic compound?
Q. 24. What is the gram equivalent mass of Na2CO3 in- a) Na2CO3 + 2HCl= 2NaCl +H2O b) Na2CO3 + HCl = Nacl + NaHCO3
Q. What are the structures of 1 pentanal , 3 pentanone , Ethyl alcohol and isobutyl alcohol
Q. Give detailed mechanism of hydration of alkynes highlighting each step
Also explain when the hydration of alkynes give ketones and when it gives aldehydes
Q.
Choose the incorrect among the following
Basic strength : LiOH<NaOH< KOH
Conductivity : LiCl(aq)>NaCl(aq)>KCl(aq)
Stability : Li2CO3< Na2CO3< K2CO3
Solubility : Li2CO3< Na2CO3< K2CO3
Q. Mass of NaOH required to react completely with 100 ml of 0.2 M H2SO4 is x. Then the value of 5x is (in gram)?
Q. When Na2S2O3.5H2O oxidised to Na2S4O6, calculate the equivalent mass of Na2S2O3.5H2O
Q. An album halide by formation of grignard reagent followed by hydrolysis yield butane. What is the original alkyl halide
Q. how to calculate molecular mass of hydrated oxalic acid from oxalic acid
Q.
Toulene reacts with Cl2 in the presence of Iron (III) chloride to produce
o - & p - chlorotoulene
Benzyl chloride
m - chlorotoulene
Benzoyl chloride
Q. The molar mass of CuSO 5 H2O is 249. Itsequivalent mass in the reaction (a) and (b) wouldbe(a) Reaction CuSO4 with KI giving a produc(b) Electrolysis of CuSO4 solution.(1) (a) 249 (b) 249(3) (a) 249 (b) 124.5 (4) (a) 124.5 (b) 249(2) (a) 124.5 (b) 124.5
Q. Calculate the maximum mass of ammonia which can be produced using 56 g of Dinitrogen and 10 g of
Dihydrogen
Q.
Which is not present in Grignard reagent
[CBSE PMT 1991]
Methyl group
Magnesium
Halogen
-COOH group
Q. Alkyl halides can be converted into Grignard reagents by:
- boiling them with Mg ribbon in alcoholic solution
- warming them with magnesium powder in dry ether
- refluxing them with MgCl2 solution
- warming them with MgCl2
Q. Among methanol and phenol which has stronger hydrogen bonding? And why as both have OH group?
Q. Halide of an element when heated with Li Al H4 to give compound (B). Compound (B) reacts with
H2O to give compound (C) which is antiseptic. Identify A, B and C. Write down structure of
compound (B).
H2O to give compound (C) which is antiseptic. Identify A, B and C. Write down structure of
compound (B).
Q. An alkyl bromide (A) forms Grignard reagent which on treatment with water, yields n-hexane. (A) On treatment with sodium forms 4, 5-diethyloctane. (A) is:
- CH3−(CH2)5−Br
- CH3−(CH2)3−CHBr−CH3
- CH3−(CH2)2−Br|CH−CH2−CH3
- CH3−(CH2)2−Br|CH−CH=CH2
Q. C_2O_4^{-2} + H_2SO_4 †extemdash†extemdash†extemdash→ CO_2 + H_2S Calculate the mass of oxalate ion & sulphuric acid to produce 1.7gm of H_2S
Q. 1 chloro 3 bromo cyclo butane + Na/Ether = major product ?
Q. CH4 and O2 are mixed in 2:3 molar ratio. If mass of CH4 is 530 gram then calculate mole fraction of CH4
Q.
How many molecules of water of hydration is present in 252gm of oxalic acid?
Q. The equivalent mass of H3PO4 (Molecular weight = 98g/mol) & Na2HPO (molecular weight =142g/mol ) in the reaction are respect
H3PO4 +2NaOH -----> Na2HPO4 +2H2O
Q. meyhyl bromide is converted into eyhane by heating with Na why not Al zn and cu
Q.
How many grams of carbon dioxide is produced when 2.25gof lime is added in 125ml of 0.28M solution of sulphuric acid?
Q. Q.If 12.6g of NaHCO3 is added to 30.0g of CH3COOH solution, the residue is found to weigh 36.0g. What is the mass of CO2 released in the reaction ?