A. silicon
B. germanium
C. tin
D. selenium
✅ The correct answer is option D.
Which among the following is not correctly matched?
A. Brass: copper and zinc
B. Duralumin : Copper and aluminum
C. Constantan: Copper and Nickel
D. White Gold- Gold and Silver
✅ The correct answer is option D.
The chemical oxygen demand COD test is commonly used to measure which of the following?
A. amount of organic compounds in water
B. amount of oxygen in water
C. amount of oxygen in a chemical
D. amount of oxygen used in a oxygenation process
✅ The correct answer is option A.
Which among the following is an organic mineral?
A. Amber
B. Hornblende
C. Angite
D. Analcime
✅ The correct answer is option A.
Liming is the application of calcium and magnesium rich materials to soil in various forms, including marl, chalk, limestone, or hydrated lime. What is the purpose of liming?
A. Increase the Soil pH
B. Increase the bacteria activity
C. Both A & B
D. Decrease the bacterial activity
✅ The correct answer is option C.
Who among the following established that genetic code of all organisms is spelled out in three-letter words, each set of three nucleotides codes for a specific amino acid?
A. Hargobind Khorana
B. Barbara McClintock
C. Theodor O. Diener
D. Joseph L. Goldstein
✅ The correct answer is option A.
Which among the following is a main component of some alert tablets such as Alert, No Doz, Stay Awake & Vivarin?
A. Thein
B. Caffeine
C. Nicotine
D. catechins
✅ The correct answer is option B.
Which among the following compound of barium is used as radio contrast agent for X-ray imaging and other diagnostic procedures and also commonly called as Barium Food?
A. Barium Carbonate
B. Barium Sulphate
C. Barium Bromide
D. Barium hydroxide
✅ The correct answer is option B.
Which among the following is used as an antidote?
A. Paracetamol
B. Nicotine
C. Thiamine
D. Activated Charcoal
✅ The correct answer is option D.
Which among the following will undergo a chemical reaction depending on the pH of the solution?
A. Calcium Oxide
B. Zinc Oxide
C. Ferric Oxide
D. Ferrous Oxide
✅ The correct answer is option B.