Bases

Q.

The ash obtained from burning of magnesium ribbon is dissolved in water. The solution is tested by litmus paper for acidic nature. Which of the following options is/ are correct?

1. red litmus turns blue.

2. blue litmus turns red.

3. no change is observed.

4. litmus test cannot test acidic or basic nature.

Q.

${\mathrm{NH}}_4\mathrm{OH}$ is a weak base because:

1. It is completely ionized

2. It is partially ionized

3. It has a low density

4. It has a low vapor pressure

Q.

What is the taste of the base?

1. Salty

2. Sweet

3. Bitter

4. None of these

Q.

Write the names of the bases NaOH, KOH, $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$ and ${\mathrm{NH}}_4\mathrm{OH}$

Q.

Define a base. Write the name and formula of one base.

Q.

Which of the following is/are not a property of a base?

1. Bases are bitter in taste

2. Bases do not change the colour of red litmus.

3. Bases turn red litmus blue​

4. Bases are soapy to touch

Q.

Which of the following substance is not sour to taste?

1. Allum

2. Lemon Juice

3. Tamarind

4. Raw Mangoes

Q.

202(d) Give two examples of strong bases.

Q. Limewater is a/an ______.

1. acid
2. base
3. water
4. salt