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- Question
What African-American inventor received 5 patents in the field of shoemaking?
Options- A. Elijah McCoy
- B. Jan Ernst Matzeliger
- C. Ernest Just
- D. Lewis Latimer
- Correct Answer
- Jan Ernst Matzeliger
ExplanationMatzeliger never benefited financially from his inventions. He died in 1889 at the age of 37 from tuberculosis. - 1. Cutaneous respiration occurs in
Options- A. Cockroach
- B. Salamander
- C. Crab
- D. Parrot Discuss
- 2. ___________ is the second largest animal phylum.
Options- A. Mollusca
- B. Chordata
- C. Coelomates
- D. Anneldia Discuss
- 3. Which of the following is not a subatomic particle?
Options- A. neutron
- B. ion
- C. electron
- D. proton Discuss
- 4. What is the primary component of natural gas?
Options- A. Nitrogen
- B. Ethane
- C. Propane
- D. Methane Discuss
- 5. Which compound is an electrolyte?
Options- A. HCl
- B. NaCl
- C. HBr
- D. All of the above Discuss
- 6. Which of the following is a polymer?
Options- A. Glycerol
- B. Amino acid
- C. Nucleic acid
- D. Fatty acid Discuss
- 7. There are approximately how many muscles in Human body ?
Options- A. 206
- B. 310
- C. 554
- D. 700 Discuss
- 8. Presence of large amounts of nutrients in waters also causes excessive growth of _________ algae.
Options- A. Biomagnification
- B. Algal bloom
- C. planktonic
- D. Eutrophication Discuss
- 9. The charge on positron is equal to the charge on
Options- A. proton
- B. electron
- C. alpha- particle
- D. neutron Discuss
- 10. Which of the following is a false statement?
Options- A. As bond order increases the strength of the bond increases
- B. Bond order is proportional to the bond length
- C. Molecules with negative bond order are highly unstable
- D. Bond order is inversely proportional to the bond length Discuss
More questions
Correct Answer: Salamander
Correct Answer: Mollusca
Correct Answer: ion
Explanation:
The particles which makes upon an atom are called subatomic particles. Electrons, protons and Neutrons that makes an atom are called subatomic particles.
Whereas,
An ion is an atom or group of atoms in which the number of electrons is different from the number of protons.
Correct Answer: Methane
Explanation:
Natural gas is primarily composed of methane, but also contains ethane, propane, and heavier hydrocarbons.
Natural gas is a colorless, tasteless, odorless, and non-toxic gas. Because it is odorless, mercaptan is added to the natural gas, in very small amounts to give the gas a distinctive smell of rotten eggs. This strong smell can alert you of a potential gas leak.
It also contains small amounts of nitrogen, carbon dioxide, hydrogen sulphide and trace amounts of water.
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: Nucleic acid
Explanation:
Nucleic acid is a polymer among the given options.
Correct Answer: 700
Explanation:
Approximatey there are 700 muscles in Human body.
Correct Answer: planktonic
Correct Answer: proton
Correct Answer: Bond order is proportional to the bond length
Explanation:
Bond order is proportional to the bond length is a False statement since Bond order is inversely proportional to the bond length.
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