Chemistry problems
- 1. Which of the following is the lightest metal?
Options- A. Lithium
- B. Silver
- C. Mercury
- D. Lead Also asked in: GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst
Correct Answer: Lithium
- 2. Water always contains hydrogen and oxygen in the ratio 1:8 by weight.This is in accordance with the
Options- A. Law of Multiple Proportions
- B. Law of Definite Proportion
- C. Law of Conservation of mass
- D. Law of Reciprocal Proportions Discuss
Correct Answer: Law of Definite Proportion
Explanation:
The Law of Definite Proportion states that the same compound, wherever found or however made, always contains the same elements combined together in the same fixede ratio by weight.
- 3. PAS is a drug used in the treatment of
Options- A. tuberculosis
- B. Cancer
- C. typhoid
- D. malaria Discuss
Correct Answer: tuberculosis
Explanation:
Para-amino salicyclic acid (PAS) is used in the treatment of Tuberculosis.
- 4. Which of the following is an element
Options- A. alumina
- B. brass
- C. graphite
- D. silicon Discuss
Correct Answer: silicon
- 5. When the nucleus of Uranium is bombarded with neutrons, it breaks up into two nuclei of nearly equal mass. this process is called
Options- A. nuclear fission
- B. nuclear fusion
- C. physical change
- D. artificial radioactivity Discuss
Correct Answer: nuclear fission
- 6. Metal present in chocolate wrappers is
Options- A. Aluminium
- B. Haemoglobin
- C. Chalk
- D. Chlorophyll Also asked in: GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst
Correct Answer: Aluminium
- 7. Glass is a.........mixture of metallic...........
Options- A. homogenous, sulphates
- B. homogenous, silicates
- C. heterogenous, carbonates
- D. heterogenous, nitrates Discuss
Correct Answer: homogenous, silicates
- 8. Is boiling water a chemical change? Also asked in: Analyst, Bank Clerk, Bank PO, Database Administrator, IT Trainer
Correct Answer: No Boiling water is not a chemical change Because in this process it doesn't loss its properties It just changes its state ie, from liquid state to gaseous Hence, Boiling water is a Physiacl change and not a chemical change
- 9. What are the two types of pure substances? Also asked in: Analyst, Bank Clerk, Bank PO
Correct Answer: An atom is the smallest particle of a substance Chemical substances are divided into two major groups They are 1 Pure Substances (and) 2 Mixtures There are two types of pure substances that are Elements and Compounds Elements : An element is a substance that is made up of only one kind of atoms and cannot be broken down into simpler substances by chemical means Metals and Non- metals come under elements Examples of elements are Iron, Silver, Gold, Mercury etc Compounds : A Compound is a substance that is formed when two or more elements combine chemically Examples of compounds are Water, Carbon dioxide, methane, vinegar etc Mixtures : A Mixture is formed when two or more substances mixed together but not chemically combined Example: Air
- 10. What element is found in all organic compounds?
Options- A. Hydrogen
- B. Calcium
- C. Nitrogen
- D. Carbon Also asked in: AIEEE, Bank Exams, CAT, GATE, GRE, Analyst, Bank Clerk, Bank PO
Correct Answer: Carbon
Explanation:
Carbon is found in all organic compounds.
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