. Acid, ce that ean donate H or OF to maintain an equilibrium is a. Acid. b. bas

Question

. Acid, ce that ean donate H or OF to maintain an equilibrium is a. Acid. b. base. c. pH. d. buffer. CA 37.An example of polysaccharide is t. a-cellulose b. glucose. C. tructose d. maltrose. 38. Which of these is not an ionic particle? a. protons b. neutrons c. electrons d. noble gas 39.An element like helium is an example of a(n) a. orbital atom. b. electronic atom. c. neutronic atom. d. noble gas. e. Protons. 40·Positively charged atoms are called a. electrons. b. neutrons. c. anions. d. cations. e. ions. 41.Negatively charged atoms are called a. electrons. b. neutrons. c. anions. d. cations. e. ions. ancia

Explanation / Answer

Ans. #36. Correct option- d. Buffer. A buffer can donate/accept H+ and OH- in the solution to maintain the pH at equilibrium.

# An acid donates H+.

# A base donates OH-.

# pH is negative log of H+ in the solution. It’s a unit of measuring H+ in solution- it can’t accept any ion.

#37. Correct option- a. Cellulose is a polysaccharide- a polymer of monosaccharides (here, glucose).

# Glucose and fructose are monosaccharides, but NOT Polymer.

# Maltose is a disaccharide but NOT a polysaccharide.

#38. Correct option- d. noble gas. A noble gas is NOT in ionic state, it’s as the neutral elemental state.

# An ionic particle forms when an elemental atom gains or lose one or more electrons.

It has electrons, protons and neutrons like its parent atom but has lost or gained one or more electrons.

#39. Correct option- d. noble gas. He is a noble gas. He is also an atom. However, due to its complete duet and subsequent chemical inertness, it is characterized as a noble gas.

# A proton is a hydrogen ion (H+).

# The terms orbital atom, electronic atom and neutronic atom don’t appear to be scientifically accepted for classification of atoms.

#40. Correct option- d. Cation. Positively charged atoms are called cation. For example, the hydrogen ion, H+ is a cation. An atom that loses one or more electrons becomes positively charged, and is called a cation.

# Electrons and protons are sub-atomic particles of the atom.

# An ion can be positively charged (cation) or negatively charged (anion).

#41. Correct option- 3. Anion. Negatively charged atoms are called anions. An atom that gains one or more electrons becomes negatively charged, and is called an anion.

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