Discussion
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- Question
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
- Correct Answer
- 20
- 1. ___________ 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
- 2. Which of the following are highly compressible?
Options- A. Solid
- B. Liquid
- C. Gas
- D. Solid and Liquid Discuss
- 3. Oxide of which of the following will turn red litmus blue?
Options- A. Magnesium
- B. Phosphorus
- C. Sulphur
- D. Carbon Discuss
- 4. 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
- 5. 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 Discuss
- 6. Metals are generally ______. I. Ductile II. Malleable III. Poor conductors of heat
Options- A. Only I and II
- B. Only I and III
- C. Only II and III
- D. All I, II and III Discuss
- 7. Which among the following is used in making liquors, medicines and as a fuel in aircrafts?
Options- A. Propyl alcohol
- B. Dimethyl alcohol
- C. Ethyl alcohol
- D. Methyl alcohol Discuss
- 8. Glass is also called ________.
Options- A. Supercooled liquid
- B. Super liquid
- C. Ideal liquid
- D. Distilled liquid Discuss
- 9. Which compound is used in Anti-malarial drug?
Options- A. Aspirin
- B. Neosporin
- C. Chloroquin
- D. Antacid Discuss
- 10. Which of the following elements has the lowest melting point?
Options- A. Platinum
- B. Carbon
- C. Cobalt
- D. Krypton Discuss
Chemistry problems
Search Results
Correct Answer: Greenhouse
Correct Answer: Gas
Correct Answer: Magnesium
Correct Answer: Electroplating
Correct Answer: 100
Correct Answer: Only I and II
Correct Answer: Ethyl alcohol
Correct Answer: Supercooled liquid
Correct Answer: Chloroquin
Correct Answer: Krypton
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