Question

1. Among the following that is not a base is: A) NaOH B) KOH C) NH4OH D) C2H5OH
2. To protect tooth decay we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is A) Acidic B) Neutral C) Basic D) Corrosive
3. A solution when added to crushed egg shell, a gas is evolved that turns lime water milky. The solution contains. A) NH4Cl B) NaCl C) KCl D) HCl.
4. The PH values of the four solutions A,B,C,D are 5,12,8,and 9 respectively. The correct decreasing order of their hydroxyl ion concentration is A) A>B>C>D B) D>C>B>A C) A>C>D>B D) B>D>C>A
5. The following type of medicine is used for treating indigestion: A) Antibiotic B) Analgesic C) Antacid D) Antiseptic
6. A solution turns red litmus to blue its PH is likely to be. A) 1 B) 4 C) 5 D)10
7. When zinc reacts with sodium hydroxide , the liberating gas is A) Hydrogen B) Carbon dioxide C) Chlorine D) Sulphur
8. Use of this on Bee stung area gives relief from pain and irritation. A) Orange juice B) Vinegar C) Baking soda D) Sour milk
9. The acid present in Ant sting is A) Oxalic acid B) Acetic acid C) Methanoic acid D) Citric acid. 10. Our body works within the pH range of A) 5.0 to 5.6 B) 8.5 to 9.0 C) 7.0 to 7.8 D) 2.0 to 3.8 11. Tooth decay starts when the PH of the mouth is A) Above 5.5 B) Between 7 to 5.5 C) Lower than 5.5 D) More than 8.5​

Answer 1

Explanation:

1. C2H5OH

2. Neutral

3. HCI

4. B>D>C>A

5. Antacid

6. 10

7. Hydrogen

8. Baking soda

9. Methanoic acid

10. 7.0 to 7.8

11. Lower than 5.5

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Answer 2

Answer:

1)  D) Ethanol(C2H5OH) is not a base.

2) C) Basic

3) CaCO3

4) Increasing order of Their Hydroxyl ion is 5<8<9<12

Strong acidic property will shown by 5 >8>9>12