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Questions and Answers
Which compound is known as ‘inorganic benzene’?
Which compound is known as ‘inorganic benzene’?
What coordination number does beryllium exhibit?
What coordination number does beryllium exhibit?
Which type of silanes will give rise to a cross-linked silicone polymer on hydrolysis?
Which type of silanes will give rise to a cross-linked silicone polymer on hydrolysis?
In a compound where atoms of element Y occupy 2/3rd of tetrahedral voids, and element X is from ccp lattice, what is the formula of the compound?
In a compound where atoms of element Y occupy 2/3rd of tetrahedral voids, and element X is from ccp lattice, what is the formula of the compound?
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Which statement about boron (B) is correct?
Which statement about boron (B) is correct?
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'Designing the resume for eye appeal is no routine matter' should be placed in which position if sentences A-E need to be rearranged to form a coherent paragraph?
'Designing the resume for eye appeal is no routine matter' should be placed in which position if sentences A-E need to be rearranged to form a coherent paragraph?
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What is the product formed when phenol first reacts with concentrated sulphuric acid and then with concentrated nitric acid?
What is the product formed when phenol first reacts with concentrated sulphuric acid and then with concentrated nitric acid?
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What is the ratio of the father's age to his son's age at present?
What is the ratio of the father's age to his son's age at present?
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If the average weight of A, B, and C is 45 kg, and B's average weight with A is 40 kg, what is the weight of C?
If the average weight of A, B, and C is 45 kg, and B's average weight with A is 40 kg, what is the weight of C?
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Why do actinoids exhibit a larger number of oxidation states compared to lanthanoids?
Why do actinoids exhibit a larger number of oxidation states compared to lanthanoids?
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Why is roasting used to convert sulphide ores to oxides instead of subjecting them to direct carbon reduction?
Why is roasting used to convert sulphide ores to oxides instead of subjecting them to direct carbon reduction?
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If Abhay takes 2 hours more than Sameer to cover 30 km, what is Abhay's speed?
If Abhay takes 2 hours more than Sameer to cover 30 km, what is Abhay's speed?
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What relationship exists between α-D-(+)-glucose and β-D-(+)-glucose?
What relationship exists between α-D-(+)-glucose and β-D-(+)-glucose?
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If a 600 km journey takes 8 hours with 120 km by train and the rest by car, what is the ratio of train speed to car speed?
If a 600 km journey takes 8 hours with 120 km by train and the rest by car, what is the ratio of train speed to car speed?
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When a mixture of o− and p−bromotoluenes is obtained, what other compound could be present?
When a mixture of o− and p−bromotoluenes is obtained, what other compound could be present?
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In the process involving nitrating Toluene, reducing the product, and diazotizing the result, what is the final step?
In the process involving nitrating Toluene, reducing the product, and diazotizing the result, what is the final step?
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If 16, 28, 36 belong to one group and 20, 35, 45 belong to another group, which number would belong in both groups?
If 16, 28, 36 belong to one group and 20, 35, 45 belong to another group, which number would belong in both groups?
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Study Notes
Chemistry Notes
- Boric acid is a protonic acid.
- Beryllium exhibits a coordination number of six.
- Chlorides of both beryllium and aluminum have bridged chloride structures in the solid phase.
- B2H6.2NH3 is known as 'inorganic benzene'.
Silanes
- R2SiCl2 is the substituted silane that will give rise to cross-linked silicone polymer on hydrolysis.
Compound Formula
- In a compound, atoms of element Y form a ccp lattice, and those of element X occupy 2/3rd of tetrahedral voids, the formula of the compound is X3Y4.
Sentence Rearrangement
- The correct sequence of the sentence is: "She saw her opportunity to borrow some sugar when he came to her home to make amends."
Resume Design
- Designing a resume for eye appeal is crucial, and the objective is to create an arrangement of type and space that appeals to the eye.
- There is no best arrangement, but a good procedure is to approach the task as a graphic designer would.
Organic Chemistry
- Phenol, when it first reacts with concentrated sulfuric acid and then with concentrated nitric acid, gives 2,4,6-trinitrobenzene.
- The reaction mixture so formed contains a mixture of o− and p−bromotoluenes.
Actinoids and Lanthanoids
- Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, due to lesser energy difference between 5f and 6d than between 4f and 5d orbitals.
Metallurgy
- Roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly is due to metal sulphides being less stable than the corresponding oxides.
Carbohydrates
- α-D-(+)-glucose and β-D-(+)-glucose are anomers.
Mathematics
- If the age of the father 10 years ago was thrice the age of his son, and ten years hence, the father's age will be twice that of his son, then the ratio of their present ages is 7:3.
- The average weight of A, B, and C is 45 kg, and the average weight of A and B is 40 kg, and that of B and C is 43 kg, then the weight of B is 26 kg.
- If Abhay takes 2 hours more than Sameer to cover a distance of 30 km, and if Abhay doubles his speed, he would take 1 hour less than Sameer, then Abhay's speed is 6.25 kmph.
- If it takes eight hours for a 600 km journey, with 120 km done by train and the rest by car, and it takes 20 minutes more if 200 km is done by train and the rest by car, then the ratio of the speed of the train to that of the car is 3:4.
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Description
Test your knowledge on chemical reactions and oxidation states with this quiz. Identify the correct products formed during reactions and understand the differences in oxidation states exhibited by actinoids and lanthanoids.
