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- Question
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
Options- A. atomic structure
- B. metallurgy
- C. periodic table of contents
- D. discovery of elements
- Correct Answer
- periodic table of contents
- 1. The gas used in the manufacture of vanaspati from vegetable oil is
Options- A. hydrogen
- B. oxygen
- C. nitrogen
- D. carbon dioxide Discuss
- 2. The main use of salt in the diet is to
Options- A. make the taste of food better
- B. produce in small amounts the hydrochloric acid required for the digestion of food
- C. ease the process of cooking
- D. increase the solubility of food particles in water Discuss
- 3. The hardest form of carbon is
Options- A. coke
- B. graphite
- C. diamond
- D. charcoal Discuss
- 4. The high reactivity of fluorine is due to
Options- A. its high electro negativity
- B. small size of fluorine atom
- C. availability of d-orbitals
- D. strong F - F bond Discuss
- 5. The hottest part of the gas flame is known as
Options- A. luminous zone
- B. dark zone
- C. blue zone
- D. non-luminous zone Discuss
- 6. The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is
Options- A. cineole
- B. engenol
- C. geraniol
- D. limonene Discuss
- 7. The maximum number of covalent formed by nitrogen is
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 8. The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
Options- A. 1.568 x 103
- B. 6.023 x 1019
- C. 4.84 x 1017
- D. 6.023 x 1023 Discuss
- 9. The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
Options- A. helium
- B. ozone
- C. oxygen
- D. methane Discuss
- 10. The nucleus of an atom consists of
Options- A. electrons and neutrons
- B. electrons and protons
- C. protons and neutrons
- D. All of the above Discuss
Chemistry problems
Search Results
Correct Answer: hydrogen
Correct Answer: produce in small amounts the hydrochloric acid required for the digestion of food
Correct Answer: diamond
Correct Answer: its high electro negativity
Correct Answer: non-luminous zone
Correct Answer: cineole
Correct Answer: 4
Correct Answer: 6.023 x 1019
Correct Answer: ozone
Correct Answer: protons and neutrons
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