Daily Quiz-264

1. Which chemical additive in green crackers helps absorb dust and gaseous by-products during combustion?

A. Zeolite

B. Graphite

C. Calcium carbonate

D. Ferric oxide

2. Green crackers carry a QR-code primarily to:

A. Display festive messages

B. Indicate expiry date

C. Verify authenticity and trace origin to CSIR–NEERI-certified manufacturers

D. Track sound-level output

3. Which Supreme Court judgement laid the foundation for regulating the manufacture and sale of eco-friendly fireworks?

A. MC Mehta v. Union of India (2018)

B. Subhash Kumar v. State of Bihar (1991)

C. Vellore Citizens Welfare Forum v. Union of India (1996)

D. TN Godavarman v. Union of India (2000)

4. Which of the following is a correct description of the SWAS type of green cracker?

A. Uses thermite reactions to produce colour flames

B. Emits minimal aluminium residues

C. Replaces nitrate oxidisers with water-releasing agents to suppress dust

D. Uses sulphur-free formulations

5. The sound-level limit prescribed for green crackers is:

A. 100 dB at 4 metres

B. 125 dB at 4 metres

C. 90 dB at 5 metres

D. 140 dB at 4 metres

Answers Quiz- 263 (October 29)

1. B

Explanation: CSIR–NEERI spearheaded the green-cracker R&D project through its nationwide labs network under the CSIR system.

2. B

Explanation: “Green” signifies eco-modified chemistry that lowers PM₂.₅, SO₂, and heavy-metal emissions, not the literal colour.

3. B

Explanation: Barium nitrate—responsible for heavy-metal toxicity—is removed and replaced by safer oxidisers such as potassium nitrate or strontium salts.

4. D

Explanation: SWAS (Safe Water Releaser), STAR (Safe Thermite Cracker), and SAFAL (Safe Minimal Aluminium) are official categories. “SPECTRA” is not.

5. C

Explanation: Field tests show around 30–40 % reduction in PM₂.₅, SO₂, and NOₓ compared with conventional fireworks.