Ncert Solutions Chemistry Class 11th
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New answer posted
a month agoContributor-Level 10
20 g of 20% CaCO? = 20 * (20/100) = 4 g CaCO?
CaCO? (100 g) - (1200 K)-> CaO + CO? (44 g)
According to the reaction,
100 g of CaCO? → 44 g of CO?
4 g CaCO? → (4*44)/100 g of CO?
= 1.76 g of CO?
New answer posted
a month agoContributor-Level 10
ln K = ln A – (E? /R) (1/T)
In ln K v/s 1/T graph
Slope = –E? /R
–5 * 10³ = –E? /8.314
E? = 5 * 10³ * 8.314
= 41500 J mol? ¹ or 41.5 kJ mol? ¹
New answer posted
a month agoContributor-Level 10
n (B) = 3/2
n (B) = 3, n (O) = 2
n (Total) = 3 + 2 = 5
X (B) = n (B) / n (T) = 3/5
X (O) = n (O) / n (T) = 2/5
P (S) = P° (B)X (B) + P° (O)X (O)
P (S) = 280 * (3/5) + 420 * (2/5)
= 336 mm of Hg
New answer posted
a month agoContributor-Level 10
Dihedral angle (D.A.) of least stable conformer of ethane = 0°
D.A. = 0°
(Eclipsed)
New answer posted
a month agoContributor-Level 10
Aluminium is more electropositive than Cr, so it displaced chromium from Cr? O?
Cr? O? + Al - (Δ)-> Al? O? + Cr
New answer posted
a month agoContributor-Level 10
At room temperature Hg is liquid and it is purified by 'Distillation method'.
New answer posted
a month agoContributor-Level 10
BeCl? in solid state exist in a polymeric form & in a vapour state in exist in a dimeric form.
chain polymeric structure
Vapour state exist in a dimeric form
New answer posted
a month agoContributor-Level 10
| H – F | H – Cl | H – Br | H – I |
| :- | :- | :- | :- |
| 1s – 2p | 1s – 3p | 1s – 4p | 1s – 5p |
Down the group size increases
Overlapping decreases
Acidic strength increases
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