Zn + 2HCl \(\longrightarrow \) ZnCl₂ + ____\(​​​​\uparrow \)(H_2' O_2' CO₂)

(a)

H₂

(b)

O₂

(c)

CO₂

(d)

CO₂

Acids in plants and animals are organic acids. Whereas acids in rocks and minerals are_________

(a)

Inorganic acids

(b)

Weak acids

(c)

citric acid

(d)

ascorbic acid

Since metal carbonate and metal bicarbonate are basic they react with acids to give salt and water with the liberation of__________

(a)

NO₂

(b)

SO₂

(c)

CO₂

(d)

SO₄

The nature of the tooth paste commonly used is in nature

(a)

acidic

(b)

basic

(c)

neutral

(d)

neutral

The hydrated salt of copper sulphate has______colour

(a)

Red

(b)

White

(c)

Blue

(d)

Pink

Acid secreted in our stomach is______ 

(a)

hydrochloric acid

(b)

sulphuric acid

(c)

nitric acid

(d)

carbonic acid

_____&_______metals do not react with HCI or HNO₃

(a)

Gold & Magnesium

(b)

Silver & Magnesium

(c)

Gold & Silver

(d)

Zinc & Silver

Bases ionise in water to form______ions

(a)

H⁺

(b)

H₃O⁺

(c)

OH^-

(d)

O^2-

NaOH & KOH are____

(a)

strong bases

(b)

metal Oxides

(c)

weak bases

(d)

diacidic bases

Which of the following solutions do not conduct electricity?

(a)

alcohol

(b)

glucose

(c)

sulphuric acid

(d)

both a & b