Chemistry - Questions and Answers, General Study (GK)

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201.

When an alkali-metal reacts with water, which one of the following gases is produced?

(a)Hydrogen

(b)Oxygen

(c)Hydrogen peroxide

(d)Ozone

Comment

Answer is: ANA

202.

Solder is an alloy of

(a)Tin and lead

(b)Tin and copper

(c)Tin, copper and zinc

(d)Tin, lead and zinc

Comment

Answer is: ANA

203.

Neutral refractory material used in furnace is

(a)Graphite

(b)SiO₂

(c)CaO

(d)MgO

Comment

Answer is: ANA

204.

Which of the metals does not form amalgams?

(a)Zinc

(b)Copper

(c)Magnesium

(d)Iron

Comment

Answer is: DNA

205.

Which one of the following elements is alloy with iron to produce steel which can resist high temperature and also have hardness and abrasion resistance?

(a)Aluminium

(b)Chromium

(c)Nickel

(d)Tungsten

Comment

Answer is: BNA

206.

The most abundant metal in the earth's crust is

(a)Si

(b)Fe

(c)Al

(d)Cu

Comment

Answer is: CNA

207.

Which one of the following is an important ore of magnesium?

(a)Cassiterite

(b)Malachite

(c)Carnalite

(d)Galena

Comment

Answer is: CNA

208.

Which one of the following elements cannot displace hydrogen gas from a dilute acid?

(a)Zinc

(b)Copper

(c)Magnesium

(d)Iron

Comment

Answer is: BNA

209.

An example of an oxide ore is

(a)Bauxite

(b)Malachite

(c)Zinc blende

(d)Galena

Comment

Answer is: ANA

210.

The transition metal least atomic number

(a)Os

(b)Zr

(c)Pt

(d)Ru

Comment

Answer is: BNA

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Chemistry - Questions and AnswersPage 21

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