A. Boron
B. Iron
C. Copper
D. Carbon
✅ The correct answer is option D.
Chemistry MCQs
Boron is non-metal whereas AI is metal. It is due to
A. Small size
B. High nuclear charge
C. Both A and B
D. No authorized justification yet
✅ The correct answer is option C.
Which of the following is not a colligative property?
A. Lowering of vapour pressure
B. Freezing point
C. Osmotic pressure
D. Elevation of polling point
✅ The correct answer is option B.
The requirement of macronutrient per acre of the land is
A. 5 to 200 kg
B. 20-200 kg
C. 200-400 kg
D. 30-400 kg
✅ The correct answer is option A.
Boron in soil has been considered micronutrient for
A. Soil porosity
B. Proper growth of plants
C. Alkalinity of soil
D. All
✅ The correct answer is option B.
Which of the following substance do not show continuous solubility curve?
A. KCIO4
B. Na2SO4. 10H2O
C. K2Cr2O7
D. PbCl2
✅ The correct answer is option B.
Three elements needed for the healthy growth of plants are
A. N P K
B. N K C
C. N S P
D. N Ca P
✅ The correct answer is option A.
One of the outstanding features of boron is its ability to form
A. Molecular addition compounds
B. Molecular crystals
C. Semiconductors
D. Ionic compounds
✅ The correct answer is option A.
When common salt is dissolved in water?
A. The boiling point of water decreases
B. The boiling point of water increase
C. The boiling point of water remains the same
D. None of the above
✅ The correct answer is option B.
Which of the following is not a secondary pollutant
A. Ozone
B. Carbonic acid
C. Sulphuric acid
D. Carbon dioxide
✅ The correct answer is option D.