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- Question
What is the IUPAC name of [Co(NH3)4Cl2]?
Options- A. Tetra-ammine dichloro cobalt (III) chloride
- B. Tetra-ammine trichloro cobalt (III)
- C. Tri-ammine dichloro cobalt (III) chloride
- D. Tetra-ammine dichloro cobalt
- Correct Answer
- Tetra-ammine dichloro cobalt (III) chloride
ExplanationThe IUPAC nomenclature in organic chemistry is a systematic method that is used to name organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC).
The IUPAC name of the given complex [Co (NH?)?Cl? ]Cl is - Tetra-ammine dichloro cobalt (III) chloride.
The complex [Co (NH?)? Cl? ] Cl ionizes an aqueous solution to furnish the chloride ion Cl? and [Co (NH?)? Cl? ] ?.
- 1. Rank these compounds by boiling point- Pentane, Propane and Hexane.
Options- A. Pentane > Propane > Hexane
- B. Propane > Pentane > Hexane
- C. Hexane > Pentane > Propane
- D. Propane > Hexane > Pentane Discuss
- 2. What is the gram formula mass of Li2SO4 ?
Options- A. 101.2487
- B. 109.9446
- C. 111.2687
- D. 106.5871 Discuss
- 3. Order of basicity of amines in gaseous state?
Options- A. 2'> 1'> 3' > NH3
- B. 3' > 2' > 1'> NH3
- C. 1' > 2' > 3'> NH3
- D. 2'> 3'> 1' > NH3 Discuss
- 4. Which of the following is not an allotrope of carbon?
Options- A. Diamond
- B. Graphene
- C. Ethylene
- D. Buckminsterfullerene Discuss
- 5. An electrically charged atom or group of atoms is called
Options- A. An ion
- B. A meson
- C. A electron
- D. None of the above Discuss
- 6. Which of the following statements about monosaccharide structure is true?
Options- A. Aldoses and ketoses differ in the position of their hydroxyl groups.
- B. Monosaccharides can be classified according to the spatial arrangement of their atoms.
- C. All monosaccharides contain carbon, hydrogen, oxygen, and nitrogen atoms.
- D. A six-carbon sugar is called a pentose. Discuss
- 7. IUPAC full form
Options- A. Indian Union of Pure and Applied Chemistry
- B. International Union of Postal and Application Corporation
- C. International Union of Pure and Applied Chemistry
- D. International University of Poland And Combodia Discuss
- 8. What is the gram formula mass of K2CO3 ?
Options- A. 147
- B. 138
- C. 129
- D. 116 Discuss
- 9. What are the end products of cellular respiration?
Options- A. ATP, Glucose
- B. Glucose, Oxygen
- C. Oxygen, Water
- D. ATP, Water Discuss
- 10. Which of the following elements has the highest electronegativity?
Options- A. Chlorine
- B. Bromine
- C. Fluorine
- D. Helium Discuss
Chemistry problems
Search Results
Correct Answer: Hexane > Pentane > Propane
Explanation:
The boiling point of the compounds depend on the number of carbons in them. Hexane has 6, Pentane has 5 and Propane has 3 carbons. As Hexane is with 6 carbons it has highest boiling point and next Pentane with 5 and lowest Propane with 3.
Correct Answer: 109.9446
Explanation:
The term gram formula mass is synonymous with molecular mass. So, to get this, we must add molar mass of all the elements in this compound.
Given compound is Lithium Sulphate -
Elemental calculation ::
Li - Lithium - 6.941 - 2 - 13.88200 %
S - Sulfur - 32.065 - 1 - 32.065 %
O - Oxygen - 15.9994 - 4 - 63.9976 %
Now, total = 12.6264 + 29.1647 + 58.2090 = 109.9446
Hence, the gram formula mass of Li2SO4 = 109.9446.
Correct Answer: 3' > 2' > 1'> NH3
Explanation:
The order of basicity in ammonia is different in gaseous phases vs. aqueous phases due to hydrogen bonding.
So in gaseous phases it's the well known: 3' > 2' > 1'> NH3. Just so we're on the same page, this is due to the inductive effect of electron donating alkyl groups--they destabilize the lone pair on nitrogen atom, making nitrogen more basic.
But in aqueous phase, the order is slightly different: 2'> 1'> 3' > NH3.
Correct Answer: Ethylene
Explanation:
Allotropes are different structural modifications of an element, that is, each of two or more different physical forms in which an element can exist.
Carbon is capable of forming many allotropes due to its valency. Well-known forms of carbon include charcoal, diamond, graphite, buckminsterfullerene and graphene.
Hence, Ethylene is not an allotrope of Carbon.
Correct Answer: An ion
Explanation:
An electrically charged atom or group of atoms formed by the loss or gain of one or more electrons is called an Ion.
Cation:
An ion is a cation (positive ion) if it is created by electron loss and is attracted to the cathode in electrolysis.
Anion:
An ion is an anion (negative ion) if it is created by an electron gain and is attracted to the anode.
The valence of an ion is equal to the number of electrons lost or gained and is indicated by a plus sign for cations and a minus sign for anions.
Ex: Na +, Cl?, Ca ++,...
Correct Answer: Monosaccharides can be classified according to the spatial arrangement of their atoms.
Explanation:
Monosaccharides, also called simple sugars, are the most basic units of carbohydrates. They are fundamental units of carbohydrates and cannot be further hydrolyzed to simpler compounds.
Hence, Monosaccharides can be classified according to the spatial arrangement of their atoms is true about Monosaccharides.
Correct Answer: International Union of Pure and Applied Chemistry
Explanation:
IUPAC stands for International Union of Pure and Applied Chemistry.
A chemical nomenclature is a set of rules to generate systematic names for chemical compounds. The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry (IUPAC).
Correct Answer: 138
Explanation:
The gram formula mass of a compound is nothing but the molar mass.
The molar mass of K2CO3 (Potassium Carbonate) is given by
Atomic weights of individual elements are
K (Potassium) = 39 g
C (Carbon) = 12 g
O (Oxygen) = 16 g
Hence, that of K2CO3 = 39(2) + 12 + 16(3)
= 78 + 12 + 48
= 138.
Correct Answer: ATP, Water
Explanation:
Cellular respiration is the three-step process by which cells make ATP using glucose and oxygen.
Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP, waste products include carbon dioxide and water.
Correct Answer: Fluorine
Explanation:
Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons.
Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element and lithium is the least.
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