11. Which of the following set has all species isoelectronic
A. F – Cl – Br
B. Li+1 – Na+1 – K+1
C. F – Ne – Na+
D. H+ – H- – H
✅ The correct answer is option C.
Chemistry
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12. Octane number 2 2 4-trimethyl pentane is
A. 100
B. 90
C. 80
D. 70
✅ The correct answer is option A.
13. The term internal salt refers to
A. Acidic character of amino acids
B. The basic character of amino acids
C. The dipolar character of amino acids
D. Non-polar structure of amino acids
✅ The correct answer is option C.
14. Which element has same isotopes like palladium
A. Nickel
B. Calcium
C. Cadmium
D. Tin
✅ The correct answer is option B.
15. Propene can exhibit
A. cis-trans isomerism
B. geometric isomerism
C. both A & B
D. none of the above
✅ The correct answer is option D.
16. Polymers described as large molecules built up from small repeating units called
A. Biopolymers
B. Dimers
C. Monomers
D. Metamers
✅ The correct answer is option C.
17. Water absorber used in combustion analysis is
A. 50% KOH
B. Lime water
C. CaCl2
D. Mg (CIO4)2
✅ The correct answer is option D.
18. Geometric isomerism is usually found in
A. Alkanes
B. Alkenes
C. Alkynes
D. Esters
✅ The correct answer is option B.
19. A polymer in which three different monomers combine called.
A. Copolymer
B. Terpolymer
C. Homopolymer
D. Biopolymer
✅ The correct answer is option B.
20. A limiting reactant is one which
A. is taken in lesser quantity in grams as compared to other reactants
B. is taken in lesser quantity in volume as compared to other reactants
C. gives the maximum amount of the product which is required
D. gives the minimum amount of the product under consideration
✅ The correct answer is option D.