IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies.
Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.
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Q1. There is pπ-dπ multiple bonding in
Solution
CS2
S=C=S d- orbital is present in sulphur (in excited state)
S=C=S d- orbital is present in sulphur (in excited state)
Q2.Among CH4,NH3 and H2O, acidity of H2O is maximum because
Solution
Oxygen is more electronegative than C or N
Oxygen is more electronegative than C or N
Q3. A group 16 element exists in the monoatomic state in metallic lattice. It also exists in two crystalline forms. The metal is
Solution
Polonium
Polonium
Q4. Consider the following species I. [O2 ]2- II.[CO]+ III.[O2]+
Solution
I alone
I alone
Q5.When Cl2 is passed through cold dil. NaOH, the products are
Solution
NaCl,NaOCl and H2O
2NaOH+Cl2→NaCl+NaClO+H2O
NaCl,NaOCl and H2O
2NaOH+Cl2→NaCl+NaClO+H2O
Q6. Consider the following properties of the noble gases
I. They readily form compounds which are colourless
II. They generally do not form ionic compounds
III. They have variable oxidation states in their compounds
IV. Generally do not form covalent compounds
Select the correct properties
Solution
II, III
II, III
Q7. Which of the following compounds possesses Lewis acid character?
I. BF3 II. SiF4 III.PF5
Select the correct answer using the codes given below
Codes
Solution
I alone
Boron is electron-deficit in BF3
I alone
Boron is electron-deficit in BF3
Q8.The interhalogen compound not obtained is
Solution
BrCl7
Due to steric effect
BrCl7
Due to steric effect
Q9.Hypervalent ion is/are
Solution
ClO4-
Oxidation Number of Cl=+7
Thus, maximum value
ClO4-
Oxidation Number of Cl=+7
Thus, maximum value