Chemistry

Among the following statements, identify the correct set of statements:
(A) Size of Li is smaller than Mg
(B) Both Li and Mg form covalent compounds readily
(C) Both Li and Mg react with nitrogen and form nitride
(D) Oxides of Li and Mg do not combine with excess oxygen to give superoxides

Identify the correct option from below:

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3 months ago

Chemistry Biomolecules

The number of compounds which do not show Fehling solution test?
Compound:

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Contributor-Level 10

Key point: Fehling solution do not oxidise aromatic aldehydes, except when EWG present
at O/P position So (I), (III), (IV) not show this test

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3 months ago

Consider the following reaction
CH₂ = CH – CH = CH₂ + HBr → (40°C) the number of geometrically active products is/are:

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3 months ago

The Number of Species which have square pyramidal shape Species:-
XeOF₄, ClF_5, XeF_4, PCl_5, XeO₃F₂, SbCl_5, BrF₅.

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Contributor-Level 10

According to VSEPR theory:
For the species which contain
Has square pyramidal shape

These are BrF? , ClF? , XeOF?

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3 months ago

The EAN value of [Ti(σ – C₅H₅)₂(π – C₅H₅)₂] is

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Chemistry Coordination Compounds

Contributor-Level 10

Total number of electron in Ti = 22
Total number of electron in Ti? = 22 – 4 = 18 So EAN value of Ti = 18 + 12 + 4 = 34

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3 months ago

For how many metals leaching method is used for its concentration of ore
Metals: Cu, Zn, Pb, Al, Au, Ag

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Contributor-Level 10

Factual
⇒ leaching methods is used for those metal in which metal is more soluble than impurities and these are Al, Au, Ag, low grade Cu

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3 months ago

The number of Cl = O bond in Chlorous acid is

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Contributor-Level 10

Chlorous acid ⇒ HClO?

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3 months ago

200ml of 0.5M solution of CuBr₂ was electrolysed using Pt as electrodes with a current of 0.965 ampere in one hour, what is the normality of the remaining CuBr₂ solution assuming no change in volume?

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Contributor-Level 10

Initial m equivalent of Cu²? = 200 * 0.5 * 2 = 200 m eq
So electricity passed = (0.965*3600)/96500 = 36 * 10? ³ eq. = 36 m eq
m eq CuBr? remaining = 200 – 36 = 164 ∴ N = meq / V (in ml) = 164/200 = 0.82

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3 months ago

Calculate the volume occupied by 12.0 g of propane gas at 60°C and 740 mm of pressure. (Molecular weight of C = 12 g/mol , H = 1 g/mol ) [R = 0.082 L atm/molK]

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Contributor-Level 10

Mol wt of propane = 44 g and weight of propane = 12.0 g
So, using PV = nRT
V = (nRT)/P = (12/44) * 0.082 * 333) / (740/760) = 7.648 L

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3 months ago

How much propyl alcohol must be added to 1.00lt. of water so the solution will not freeze at –15°C ? (K_f of water = 1.86 KKgmol^-1)[d(H₂O) = 1 g/ml and molecular mass of propyl alcohol = 60 g/mol ]

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