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- Question
The salt concentration (measured as salinity in parts per thousand), is greater than _______ % in hypersaline lagoons.
Options- A. 50
- B. 100
- C. 150
- D. 200
- Correct Answer
- 100
- 1. A change in which one or more new substances are formed is called _________.
Options- A. Physical Change
- B. Chemical Change
- C. Rusting
- D. Galvanisation Discuss
- 2. The main mineral constituents of the continental mass are ________ and alumina.
Options- A. iron oxide
- B. silica
- C. water
- D. oxygen Discuss
- 3. Warming Ammonium chloride with sodium hydrochloride in a test tube is an example of
Options- A. Open system
- B. Closed system
- C. Isobaric system
- D. Isothermal system Discuss
- 4. Which of the metals has the maximum thermal conductivity?
Options- A. Iron
- B. Aluminium
- C. Silver
- D. Copper Discuss
- 5. What is contained in Chlorophyll ?
Options- A. sodium
- B. potassium
- C. manganese
- D. magnesium Discuss
- 6. The process of depositing a layer of any desired metal on another material by means of electricity is called ___________.
Options- A. Electroplating
- B. Galvanisation
- C. Rusting
- D. Crystallisation Discuss
- 7. Oxide of which of the following will turn red litmus blue?
Options- A. Magnesium
- B. Phosphorus
- C. Sulphur
- D. Carbon Discuss
- 8. Which of the following are highly compressible?
Options- A. Solid
- B. Liquid
- C. Gas
- D. Solid and Liquid Discuss
- 9. ___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.
Options- A. Carbon dioxide
- B. Methane
- C. Greenhouse
- D. Ozone Discuss
- 10. The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 2nd group and the 4th period?
Options- A. 20
- B. 22
- C. 18
- D. 10 Discuss
Chemistry problems
Search Results
Correct Answer: Chemical Change
Correct Answer: silica
Correct Answer: Open system
Correct Answer: Silver
Correct Answer: magnesium
Correct Answer: Electroplating
Correct Answer: Magnesium
Correct Answer: Gas
Correct Answer: Greenhouse
Correct Answer: 20
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