Discussion
Home ‣ General Knowledge ‣ Chemistry Comments
- Question
Which of the following elements has the highest electronegativity?
Options- A. Chlorine
- B. Bromine
- C. Fluorine
- D. Helium
- Correct Answer
- Fluorine
ExplanationElectronegativity 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.
- 1. What are the end products of cellular respiration?
Options- A. ATP, Glucose
- B. Glucose, Oxygen
- C. Oxygen, Water
- D. ATP, Water Discuss
- 2. What is the gram formula mass of K2CO3 ?
Options- A. 147
- B. 138
- C. 129
- D. 116 Discuss
- 3. 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
- 4. 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
- 5. 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 Discuss
- 6. Which choice best describes the polarity of BrF5?
Options- A. nonpolar bonds / nonpolar molecule
- B. nonpolar bonds / polar molecule
- C. polar bonds / polar molecule
- D. polar bonds / nonpolar molecule Discuss
- 7. Is steel a compound?
Options- A. TRUE
- B. FALSE Discuss
- 8. Which compound forms a colored aqueous solution?
Options- A. CrCl3
- B. KBr
- C. CaCl2
- D. NaOH Discuss
- 9. Dry ice is nothing but
Options- A. Solid carbon dioxide
- B. Baking soda
- C. Gaseous carbon dioxide
- D. Carbon monoxide Discuss
- 10. What element behaves most like magnesium?
Options- A. Silicon
- B. Strontium
- C. Sulphur
- D. Tin Discuss
Chemistry problems
Search Results
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: 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: 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: 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: Tetra-ammine dichloro cobalt (III) chloride
Explanation:
The 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? ] ?.
Correct Answer: polar bonds / polar molecule
Correct Answer: FALSE
Explanation:
Steel is not a compound or element. Steel is an alloy of iron and carbon and other elements and hence it is a mixture. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons.
Correct Answer: CrCl3
Explanation:
Colored aqueous solutions are a characteristic of transition compounds.
The only transition compound in the above choices is CrCl3.
Cr is a transition element.
Correct Answer: Solid carbon dioxide
Correct Answer: Strontium
Explanation:
We know that, Elements in the same group of the periodic table have similar characteristics.
Here Magnesium and Strontium shared some similar properties because they both belong to the same group. Sr is the chemical symbol for strontium which is a group two element; it has atomic number of 38.
Comments
There are no comments.More in General Knowledge:
Programming
Copyright ©CuriousTab. All rights reserved.