Chemistry problems
- 1. When a chemical bond is broken energy is
Options- A. transferred
- B. released
- C. used
- D. None of the above Also asked in: Bank Clerk, Bank PO, AIEEE, Bank Exams, CAT, GATE, Analyst
Correct Answer: used
Explanation:
Bond breaking is an endothermic process.
Hence, bond breakage needs an amount of energy and uses some energy based on the strength of the bond to break the bond.
- 2. Which of the following definitions describes a chemical hazard?
Options- A. Microorganisms, such as bacteria, fungus, mold, or viruses that can cause illness
- B. These hazards can lead to injuries to the joints or muscles by way of heavy, frequent lifting, repetitive tasks
- C. Can be present in dust, fumes, liquids, solids, mists, vapors, or gases of products used at a site or released during a construction job
- D. The most commonly thought of hazards for construction Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Can be present in dust, fumes, liquids, solids, mists, vapors, or gases of products used at a site or released during a construction job
- 3. Washing soda is the common name for
Options- A. Sodium Bicarbonate
- B. Calcium Carbonate
- C. Sodium Carbonate
- D. Calcium Bicarbonate Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Sodium Carbonate
Explanation:
Washing soda is the common name for Sodium Carbonate (Na2CO3). It is also called as Soda Ash.
- 4. Which of the following mixtures is not a colloid?
Options- A. Sugar water
- B. Milk
- C. Paint
- D. Fog Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Sugar water
Explanation:
Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.
These Colloid substances consists of ultramicroscopic particles of one substance dispersed through another substance from which we cannot separate them.
Sugar water is not a colloid and it is a solution in which we can separate them.
- 5. Which chemical bond most likely stores the most energy?
Options- A. Single bond
- B. Double bond
- C. Both A & B
- D. None of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Double bond
- 6. Which are two chemicals used to purify water?
Options- A. Chlorine & Fluorine
- B. Fluorine & Iodine
- C. Chlorine & Hydrogen peroxide
- D. Fluorine & Iodine Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Chlorine & Hydrogen peroxide
Explanation:
Removing the contaminents if any in the water which causes harm to our health is involved in the purifying of water.
This process involves chemicals. Chloramines, Hydrogen peroxide, Iodine are the chemicals which are used in purifying water.
- 7. Atoms of the same element can differ in
Options- A. Atomic number
- B. Atomic mass
- C. electrons
- D. None of the above Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Atomic mass
Explanation:
Atoms of the same element can have same atomic number and number of electrons since, the atomic number is the number of protons and the number of protons and eectrons are the same in an element.
Hence, the atoms of the same element may differ in their atomic mass since it depends on the number of neutrons it holds and such atoms are called isotopes.
- 8. What types of atoms form covalent bonds?
Options- A. metal and metal
- B. metal and non metal
- C. non metal and non metal
- D. All of the above Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: non metal and non metal
Explanation:
Covalent bonds are bonds formed between two non metals by sharing of electrons in their outer most orbits for stable.
- 9. Which molecule is nonpolar and has a symmetrical shape?
Options- A. NH3
- B. HCl
- C. H2O
- D. CH4 Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: CH4
Explanation:
Among the given options, CH4 is a non polar molecule with symmetrical tetrahedral shape.
- 10. The chemical name of common salt is
Options- A. Calcium Chloride
- B. Potassium Chloride
- C. Sodium Chloride
- D. Magnesium Chloride Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Sodium Chloride
Explanation:
The chemical name of common is sodium chloride. Its chemical formula is NaCl.
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