Chemistry problems
- 1. Which one of the following can be used to confirm wether drinking water contains a gamma emitting isotope or not
Options- A. Microscope
- B. Scintillation counter
- C. Lead plate
- D. pectrophotometer Discuss
Correct Answer: Scintillation counter
- 2. The freezing point of water at 760mm pressure is
Options- A. 0 K
- B. 273 K
- C. 273 C
- D. -273 C Discuss
Correct Answer: 273 K
Explanation:
K is degree kelvin
Zero K corresponds to -273 K = C + 273
The freezing point of water being 0 C, on the kelvin scale it is 0 C + 273 K
- 3. What happens when two atoms form a chemical bond?
Options- A. Two atoms fuse together to form a chemical bond
- B. The atoms share or transfer electrons
- C. A chemical bond forms when two atoms transfer or share protons to achieve a stable nucleus
- D. Like charges in the atoms cause them to stick together Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
Correct Answer: The atoms share or transfer electrons
Explanation:
All chemistry is based on sharing electrons. A chemical bond forms when two atoms transfer or share outer electrons to complete their outer shells.
- 4. What is the simplest form of matter?
Options- A. Element
- B. Molecule
- C. Atom
- D. Compound Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
Correct Answer: Element
Explanation:
The simplest form of matter that has a unique set of properties and is cannot be broken down into simpler substances by chemical means is called an Element.
An Atom is the simplest form of an element.
The simplest form of some elements is a Molecule. When an element consists of two identical atoms it is called a diatomic molecule.
A substance that contains two or more elements chemically combined in a fixed proportion is called a Compound.
- 5. Which acid is produced when milk gets sour?
Options- A. Lactic acid
- B. Acetic acid
- C. Tartaric acid
- D. Butyric acid Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Lactic acid
- 6. The maximum number of hydrogen bonds in a water molecule is...........
Options- A. 1
- B. 3
- C. 4
- D. 2 Discuss
Correct Answer: 4
- 7. Acid Precipitation is caused by a mix of
Options- A. Hydrogen, Oxygen, and Saline
- B. Water, Soil, and Air
- C. Respiration, Carbonic Acids, and Seawater
- D. Sulfur Dioxide, Carbon Dioxide, Nitrogen Oxides Also asked in: AIEEE, Bank Exams, Analyst, Bank PO
Correct Answer: Sulfur Dioxide, Carbon Dioxide, Nitrogen Oxides
Explanation:
Acid Precipitation or Acid rain is caused by a mix of Sulfur Dioxide, Carbon Dioxide, Nitrogen Oxides.
A Chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as Acid Rains.
- 8. The Most Abundant Rare Gas in the Atmosphere is
Options- A. Xe
- B. He
- C. Ne
- D. Ar Also asked in: AIEEE, Bank Exams, Analyst, Bank PO
Correct Answer: Ar
Explanation:
Argon is most the most abundant Rare Gas in the atmosphere. Its elemental symbol is Ar.
- 9. Trichloroacetaldehyde was subject to Cannizzaro's reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :
Options- A. Chloroform
- B. 2, 2, 2-Trichloroethanol
- C. Trichloromethanol
- D. 2, 2, 2-Trichloropropanol Also asked in: AIEEE
Correct Answer: 2, 2, 2-Trichloroethanol
Explanation:
- 10. 'Minamata' disease was caused by ?
Options- A. Lead
- B. Mercury
- C. Cadmium
- D. Zinc Also asked in: AIEEE, CAT, Bank Clerk
Correct Answer: Mercury
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