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- Question
Stoichiometry is based on
Options- A. Law of conservation of energy
- B. Law of conservation of mass
- C. Newton's 1st law
- D. Kepler's law
- Correct Answer
- Law of conservation of mass
ExplanationStoichiometry is a branch of chemistry deals with the calculations on reactants and products. It is based on the Law of conservation of mass where total mass of reactants is equal to total mass of products.
- 1. Which of the following can be used as lamp oil?
Options- A. Lipids
- B. Carbohydrates
- C. Proteins
- D. Nucleic acids Discuss
- 2. Strength of concrete increases with
Options- A. increase in fineness of cement
- B. decrease in size of aggregate
- C. increase in water cement ratio
- D. decrease in curing time Discuss
- 3. Curdling of milk is an example of
Options- A. Inversion
- B. Denaturation
- C. Hydrolysis
- D. Coagulation Discuss
- 4. An acid can be defined as Discuss
- 5. An atom that loses or gains electrons is called
Options- A. Proton
- B. Ion
- C. Isotope
- D. Neutron Discuss
- 6. Alcohol is a stimulant. true or false
Options- A. TRUE
- B. FALSE Discuss
- 7. Which compound is an electrolyte?
Options- A. HCl
- B. NaCl
- C. HBr
- D. All of the above Discuss
- 8. What is a normal pH level in blood?
Options- A. 7.35 - 7.45
- B. 7.45 - 7.55
- C. 7.6 - 7.7
- D. 7 - 7.10 Discuss
- 9. Which metal pollute the air of a big city?
Options- A. Chromium
- B. Lead
- C. Copper
- D. Zinc Discuss
- 10. Which equation is an example of a synthesis reaction?
Options- A. 2H2 + O2 ? 2H2O
- B. Na + Cl ? NaCl
- C. HA + BOH ? H2O + BA
- D. NaCl + AgNO3 ? NaNO3 + AgCl Discuss
Chemistry problems
Search Results
Correct Answer: Lipids
Correct Answer: increase in water cement ratio
Explanation:
Strength of concrete increases with increase in water cement ratio as the strength of the cement is directly proportional to water cement ratio.
Correct Answer: Coagulation
Explanation:
Coagulation :: The action or process of a liquid, especially blood, changing to a solid or semi-solid state.
Correct Answer: An acid can be defined as a molecule or other species which can donate a proton or accept an electron pair in reactions (OR) A substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind
Correct Answer: Ion
Explanation:
An atom that loses or gains electrons is called as ion. Gaining of electron is negative charge and is called as Anion and lossing of eectron is called Cation.
Correct Answer: FALSE
Explanation:
Alcohol is a drug.
Correct Answer: All of the above
Explanation:
A substance that dissociates into ions in solution and acquires the capacity to conduct electricity. Sodium, potassium, chloride, calcium, and phosphate are examples of electrolytes, informally known as lytes.
Correct Answer: 7.35 - 7.45
Correct Answer: Lead
Correct Answer: Na + Cl ? NaCl
Explanation:
When two or more chemical species combine to form a single product, the reaction is said to be synthesis reaction. It is also called as Direct Combination reaction.
Here in the given options, Sodium (Na) combines with Chlorine (Cl) to form a more complex single product Sodium Chloride (NaCl).
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