List of top Chemistry Questions on Organic Chemistry asked in ICSE Class X board

K, L and M are beakers containing three different solutions: [Beaker K: Aqueous acetic acid, Beaker L: Sodium chloride solution, Beaker M: Distilled water]. Name the beaker which: 
(a) contains only ions. 
(b) contains only molecules. 
(c) has pH less than 7. 

 

Give one relevant observation for the following: 

(a) Sodium hydroxide is added dropwise to Calcium nitrate solution. 
(b) Dilute Hydrochloric acid is added to Iron (II) sulphide. 
(c) An amphoteric metal is added to hot concentrated alkali. 
 

Give reasons why—
(a) Hydrochloric acid cannot form an acid salt.
(b) Electronegativity increases across a period.
During the manufacture of sulphuric acid, a chemist collected the gas formed after catalytic oxidation of sulphur dioxide.
(a) Name the gas collected.
(b) Which acid is formed when the gas collected by the chemist is dissolved directly in water?
(c) Why should we not dissolve this gas directly in water?
An unsaturated hydrocarbon having two carbon atoms was made to react with two moles of hydrogen gas in the presence of a catalyst to give a saturated hydrocarbon. Using the above information, answer the following questions.
(a) The type of reaction that occurred is __________ (addition / substitution)
(b) Name a suitable catalyst which is used in the reaction
(c) Write a balanced chemical equation for the above reaction
Elements P, Q, and R are in the same period of the modern periodic table.
• P readily loses its one valence electron to form a stable ion.
• Q shares its electrons in bonding but does not form ions easily.
• R has high electronegativity.
Complete and balance the following equations:
(a) (C_2H_4Br_2 + 2KOH (textalcoholic) )
(b) (8NH_3(textexcess) + 3Cl_2 )
(c) (C_12H_22O_11 xrightarrowtextconc. H_2SO_4)
Draw the structural diagram for each of the following organic compounds:
1. Butanal
2. Pent-2-yne
3. The isomer of n-butane

(a) Give the IUPAC name for the following organic compounds: 

 

An unsaturated hydrocarbon with three atoms of carbon and six atoms of hydrogen is:

A hydrocarbon X undergoes the reaction under suitable conditions as shown below. 

 

Identify the equation that shows the reaction of ethane with chlorine in the presence of ultraviolet light.