Question

Mark $T$ if the statement is true and '$F$' if it is false:
A.Nitric acid turns red litmus blue.($T/F$ )
B.Sodium Hydroxide turns blue litmus red. ($T/F$ )
C.Sodium Hydroxide and hydrochloric acid neutralize each other and form salt and water. ($T/F$)
D.The indicator is a substance that shows different colors in acidic and basic solutions.($T/F$ )

Answer 1

Hint:In chemistry, the matter is classified according to composition, state, and solubility. Along with various categories, there is no method to identify the nature of the compound. The nature of any chemical compound also varies with metal, nonmetal, and metalloid.

Complete step by step answer:
Before discussing the given true, false statement, let's have a look at the detail of acid, base, salt, and indicator.
Acid - When a substance is dissolved in water and it gives ${H^ + }$ ion that is known as acid.
Base - When a substance is dissolved in water and it gives $O{H^ - }$ ion that is known as a base.
Salt - It is composed of acid and base or a combination of anion and cation.
Indicator - A thing that indicates the nature of the substance. There are mainly three types of indicators that are litmus paper, methyl orange, phenolphthalein.
Litmus paper - Its natural color is purple. Acid turns blue litmus to red while base turns red litmus to blue.
Methyl orange - Its natural color is orange. It becomes red in acidic solution and yellow in basic solution.
Phenolphthalein - Its natural color is colorless. It shows colorless in acidic solution and pink in basic solution.
i.False. Acid turns blue litmus to red and Nitric acid is an acid.
ii.False. The base turns red litmus to blue and sodium hydroxide is the base.
iii.True. When acid and base combine it gives salt and water. Here, sodium hydroxide is the base, and hydrochloric is acid.
iv.True,Since Indicator indicates the nature of substance.

Note:
Alkali - It is an aqueous solution of base. All alkali is based but all bases are not alkali. Strong acid and base - When substance ions completely dissociate in water. Weak base and acid - When substance ions completely do not dissociate in water.