>
CBSE Class XI
List of top Questions asked in CBSE Class XI
Depict the galvanic cell in which the reaction Zn(s) + 2Ag
+
(aq)
\(\rightarrow\)
Zn
2+
(aq) + 2Ag(s) takes place, further show:
which of the electrode is negatively charged,
the carriers of the current in the cell, and
individual reaction at each electrode.
CBSE Class XI
Chemistry
Redox Reactions And Electrode Processes
Write IUPAC names of the following compounds:
CBSE Class XI
Chemistry
Classification of Hydrocarbons
Fluorine reacts with ice and results in the change:
\(H_2O(s) + F_2{(g)} \rightarrow HF{(g)} + HOF{(g)}\)
Justify that this reaction is a redox reaction.
CBSE Class XI
Chemistry
Classical Idea Of Redox Reactions – Oxidation And Reduction Reactions
While sulphur dioxide and hydrogen peroxide can act as oxidising as well as reducing agents in their reactions, ozone and nitric acid act only as oxidants. Why?
CBSE Class XI
Chemistry
Classical Idea Of Redox Reactions – Oxidation And Reduction Reactions
Suggest a list of the substances where carbon can exhibit oxidation states from -4 to +4 and nitrogen from -3 to +5.
CBSE Class XI
Chemistry
Redox Reactions In Terms Of Electron Transfer Reactions
Write the formulae for the following compounds:
(a) Mercury (II) chloride (b) Nickel (II) sulphate
(c) Tin (IV) oxide (d) Thallium (I) sulphate
(e) Iron (III) sulphate (f) Chromium (III) oxide
CBSE Class XI
Chemistry
Classical Idea Of Redox Reactions – Oxidation And Reduction Reactions
The ionization constant of chloroacetic acid is 1.35 × 10
–3
. What will be the pH of 0.1M acid and its 0.1M sodium salt solution?
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
Predict if the solutions of the following salts are neutral, acidic or basic: NaCl, KBr, NaCN, NH
4
NO
3
, NaNO
2
and KF
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
A 0.02M solution of pyridinium hydrochloride has pH = 3.44. Calculate the ionization constant of pyridine.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The ionization constant of nitrous acid is 4.5 × 10
–4
. Calculate the pH of 0.04 M sodium nitrite solution and also its degree of hydrolysis.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The pH of 0.1M solution of cyanic acid (HCNO) is 2.34. Calculate the ionization constant of the acid and its degree of ionization in the solution.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The solubility of Sr(OH)
2
at 298 K is 19.23 g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
If 0.561 g of KOH is dissolved in water to give 200 mL of solution at 298 K. Calculate the concentrations of potassium, hydrogen and hydroxyl ions. What is its pH?
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The pH of milk, black coffee, tomato juice, lemon juice and egg white are 6.8, 5.0, 4.2, 2.2 and 7.8 respectively. Calculate corresponding hydrogen ion concentration in each.
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The ionization constant of propanoic acid is 1.32 × 10
–5
. Calculate the degree of ionization of the acid in its 0.05M solution and also its pH. What will be its degree of ionization if the solution is 0.01M in HCl also?
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
Why is benzene extra ordinarily stable though it contains three double bonds?
CBSE Class XI
Chemistry
Aromatic Hydrocarbon
Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below:
(a) Human muscle-fluid,6.83
(b) Human stomach fluid,1.2
(c) Human blood,7.38
(d) Human saliva,6.4
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
Write chemical equations for combustion reaction of the following hydrocarbons:
Butane
Pentene
Hexyne
Toluene
CBSE Class XI
Chemistry
Classification of Hydrocarbons
Draw the cis and trans structures of hex-2-ene. Which isomer will have higher b.p. and why?
CBSE Class XI
Chemistry
Alkenes
Propanal and pentan-3-one are the ozonolysis products of an alkene? What is the structural formula of the alkene?
CBSE Class XI
Chemistry
Alkenes
An alkene ‘A’ contains three C – C, eight C – H σ bonds and one C – C
\(\pi\)
bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. Write IUPAC name of ‘A’.
CBSE Class XI
Chemistry
Alkenes
An alkene 'A' on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name of 'A'.
CBSE Class XI
Chemistry
Alkenes
Write IUPAC names of the products obtained by the ozonolysis of the following compounds:
Pent-2-ene
3,4-Dimethyl-hept-3-ene
2-Ethylbut-1-ene
1-Phenylbut-1-ene
CBSE Class XI
Chemistry
Alkenes
For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated:
C
4
H
8
(one double bond)
C
5
H
8
(one triple bond)
CBSE Class XI
Chemistry
Classification of Hydrocarbons
The ionization constant of dimethylamine is 5.4 × 10
–4
. Calculate its degree of ionization in its 0.02M solution. What percentage of dimethylamine is ionized if the solution is also 0.1M in NaOH?
CBSE Class XI
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
Prev
1
...
14
15
16
17
18
...
56
Next