Recently Active Chemistry Questions

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:: Single option Correct :: 1) A metallic element crystallises into a lattice containing a sequnece of layers of ABABAB.. Any packing of spheres leaves out voids in the lattice. Percentage of Empty Space (by Volume) is - a)52 ...

q1> C6H5-COOH + CH3MgI → q2> CH3CONHC6H5 +Br2/Fe → ...

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1- Suggest a Chemical Test to distinguish b/w - *Image* 2- Chloro Benzene is subjected to the following- i)Nitration mixture ii) Cl2/FeCl3 iii) NH2-NH2 The Final Product is ? 3) A: Only method of preparing F2 is electrolytic ...

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Calculate Potenial half cell Ag2S (s) +2e =2Ag(s) +S2-(aq) in osln buffered at ph=3 which is also saturated with 0.1M H2S (Aq) ** = denotes equilbm ...

CH3COCH3 + conc. HCl/Zn-Hg/D2O/Δ → ?? Are these the products --- CH3CH2CH3,CH3-CHD-CH3,CH3CD2CH3, ...

In a reaction : A + 2B \Leftrightarrow 2C,2 moles of A,3 moles of B and 2 moles of C are placed in 2 L flask and the eqb concentration of C is 0.5 mole/L.The eqb constant (K) for the reaction is (a). 0.073 (b). 0.147 (c). 0.0 ...

1. When XeF2 and AsF3 react and form adduct,the hybridisation of Xe and As in adduct are respectively ________,_______ ?? 2. When DEVARDA's alooy is treated with nitrates in the presence of alkali the gas evolved is (a) NO (b ...

Grams of potassium dichromate required to oxidize 24.82 g of Fe2+ in FeSO4 to Fe3+,if the reaction is carried out in acidic solution is ___ ...

1..Acetophenone----1.Br2(1 equivalent)---->? 2.NaBH4 3.Base 2. *Image* ...

*Image* Please give the stability order with proper reasons . Ans : II < I < IV < III ...

*Image* Arrange in order of stability giving reason. Ans : I < IV< II < III ...

what will be the effect of Al2O3 on alcohols??? ...

1.Which of the following statements is true regarding nucleophilic substitution- (a) Allyl chloride is more reactive than vinyl chloride . (b)Vinyl chloride is as reactive as allyl chloride (c)Vinyl chloride is more reactive ...

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1. WHICH CAN FORM A STABLE HYDRATE A>CYCLOPROPANONE b>HCHO c>HEXAFLUOROACETONE D>CHLORAL(CCL3-CHO) 2. X-->Y..ACTIVATION ENREGY FOR FORWARD AN D BACWARD RXN IS 15 AND 9kJ/mol RESP....P.E. OF X=10kJ/MOL..THEN A)T ...

q-1) each carbon atom is sp3 hybridised in diamond. the no. of tetrahedral voids occupied in diamond are? a)25% b)50% c)75% d)100% q-2)in what mass of water must 25g of CuSO4.5H2O be dissolved to obtain an 8% solution of CuSO ...

1..why strong electrolytes donot hydrolyse in solution ?????[2][2][2][2][2] ...

What is the shape of I3- ? What is the geometry of I3- ? When do we write TBP and when linear,i.e in which case we consider l.p's ? ...

Question 1 *Image* --------NaNH2,NH3------->-----CH3I------> Please write steps. ---------------------------------------------------------------------------------------- Question 2 *Image* ----MeI-->---Ag2O,H2O----&g ...

A catalyst decreases the energy of activation of the reaction : A--->B,ΔH=37.012 Kcal,by 2 %. At 27 C 4 x 10-8% of the product molecules i.e B is able to cross over the potential barrier in absence of catalyst.How many ti ...

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use of socl2 is a better approach 2 convert an alcohol 2 alkly chloride with compared 2 use of pcl5 --- please justify !!! ...

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