A. 1 & 2
B. 1 & 3
C. 2 & 3
D. 1, 2 & 3
✅ The correct answer is option D.
Which among the following makes Chile saltpetre different from saltpetre?
A. Nitrate
B. Sodium
C. Magnesium
D. Calcium
✅ The correct answer is option B.
Which among the following is ―Fool‘s Gold‖ ?
A. Copper Sulphate
B. Iron Sulfide
C. Brass
D. Silver Bromide
✅ The correct answer is option B.
When a piece of quicklime is dipped in water, it gives bubbles. This bubbling is due to which of the following?
A. Oxygen
B. Carbon Dioxide
C. Water Vapour
D. Hydrogen
✅ The correct answer is option C.
Which among the following acid is used to ascertain, whether pure Ghee has been adulterated with Vanaspati or Margarine?
A. Sulphuric Acid
B. Nitric Acid
C. Hydrochloric Acid
D. Boric Acid
✅ The correct answer is option C.
Mizoroki-Heck reaction is catalyzed by which of the following metals?
A. Rhodium
B. Sodium
C. Palladium
D. Osmium
✅ The correct answer is option C.
Which among the following is used in preparing windows for X-Ray Tubes ?
A. Barium
B. Beryllium
C. Magnesium
D. Calcium
✅ The correct answer is option B.
Which among the following first increases than decreases in a Period of a periodic table?
A. metallic property
B. Chemical Reactiveness
C. Valency
D. Electron affinity
✅ The correct answer is option C.
Which among the following were not discovered by the time , Mendeleev published his periodic table?
A. Lathanides
B. Actinides
C. Noble Gases
D. Halogens
✅ The correct answer is option C.
Ekaboron was an element predicted by Mendeleev and he leaved a space for it in his Periodic Table. Later Ekaboron was identified with _____?
A. Gallium
B. Scandium
C. Technitium
D. Germanium
✅ The correct answer is option B.