CHEMISTRY SET 05

Question No.1

Which of the following is an iron ore ?

1. Bauxite
2. Magnetite
3. Lignite
4. Nitrite

Select Answer

Correct Answer: ( C )  

Magnetite (Fe₃O₄)

Note : Hematite (Fe₂O₃).

Question No.2

Which of the following is called Philosopher’s wool?

1. Zinc carbonate
2. Zinc sulphide
3. Zinc oxide
4. Zinc blende (ZnS)

Select Answer

Correct Answer: ( C )  

Zinc oxide (ZnO)

 The compound zinc oxide (ZnO) is called philosopher's wool. Alchemists, as part of their rituals, would burn zinc in air and collect the residue, which formed into white woolly tufts.They called it lana philosophica in Latin, meaning philosopher's wool. 

 Zinc oxide has many uses: as white pigment in paints, component in zinc ointment for treating skin diseases, material in sun screens and sun lotions, in rubber manufacture and in photocopying products.

Question No.3

Bhopal gas tragedy of 1984 is related to

1. Aluminium phosphide
2. Methyl bromide
3. Methyl isocyanide
4. Carbon dioxide

Select Answer

Correct Answer: ( C )  

Question No.4

The antiseptic compound present in Dettol is ____

1. Iodine
2. Chloroxylenol
3. Biothional
4. Cresol

Select Answer

Correct Answer: ( B )  

Chloroxylenol

4-Chloro-3,5-dimethylphenol

Question No.5

The most electronegative element among the following is

1. Fluorine
2. Sodium
3. oxygen
4. Chlorine

Select Answer

Correct Answer: ( A )  

Question No.6

Non metal found in the liquid state is ______

1. Nitrogen
2. Fluorine
3. Bromine
4. Chlorine

Select Answer

Correct Answer: ( C )  

Question No.7

Brass is an alloy of_____________

1. Cu, Al, Zn
2. Cu, Sn
3. Cu, Zn
4. Al, Mg

Select Answer

Correct Answer: ( C )  

Question No.8

Bronze is an alloy of ______

1. Cu, Zn
2. Cu, Sn
3. Cu, Al
4. Sn, Zn

Select Answer

Correct Answer: ( B )  

Question No.9

How many neutrons are there in ₉₂U²³⁸ atom?

1. 92
2. 238
3. 146
4. 330

Select Answer

Correct Answer: ( C )  

Question No.10

White phosphorous is generally kept under __________

1. Alcohol
2. Water
3. Glycerine
4. Kerosene oil

Select Answer

Correct Answer: ( B )  

Question No.11

Which of the following is used as Moderator in Nuclear Reactor?

1. Uranium
2. Ordinary water
3. Radium
4. Graphite

Select Answer

Correct Answer: ( D )  

Question No.12

The chemical name of “Plaster of Paris” commonly used for setting broken bones is ___

1. Calcium nitrate
2. Calcium sulphate
3. Calcium carbonate
4. Calcium chloride

Select Answer

Correct Answer: ( B )  

Question No.13

The chemical name of Soda ash is ____

1. Sodium carbonate
2. Sodium bicarbonate
3. Sodium chloride
4. Sodium nitrate

Select Answer

Correct Answer: ( A )  

Sodium Carbonate $Na_2CO_3 $

Question No.14

Hydrochloric acid is also known as ________

1. Galic acid
2. Picric acid
3. Muriatic acid
4. Chloric acid

Select Answer

Correct Answer: ( C )  

Question No.15

Who developed the model of atomic structure?

1. Alfred Nobel
2. Faraday
3. Volta
4. Rutherford

Select Answer

Correct Answer: ( D )  

Question No.16

The hottest part of the gas flame is known as_____

1. Blue Zone
2. Non-luminous zone
3. Luminous zone
4. Dark zone

Select Answer

Correct Answer: ( A )  

Question No.17

In galvanization , iron is coated with__________

1. Copper
2. Tin
3. Zinc
4. Nickel

Select Answer

Correct Answer: ( C )  

Question No.18

Table sugar is which type of sugar?

1. Fructose
2. Galactose
3. Glucose
4. Sucrose

Select Answer

Correct Answer: ( D )  

Question No.19

What is the process of conversion from solid to gas is known as_______

1. Evaporation
2. Solidification
3. Sublimation
4. Condensation

Select Answer

Correct Answer: ( C )  

Question No.20

Which of the following is known as brown coal?

1. Peat
2. Lignite
3. Bituminous
4. Anthracite

Select Answer

Correct Answer: ( B )