NTSE Chemistry Metals and Non Metals MCQs Set 02

Question: Glass is soluble in -

• a) HF
• b) H2SO4   
• c) HCIO4
• d) Aqua-regia

Answer: HF

Question: Carborundum is the commercial name of -

• a) Al2O3 
• b) SiC
• c) CaCN2     
• d) CaC

Answer: SiC

Question: An inorganic compound (A) made of two most abundantly occurring element in the earth’s crust and used in building construction when made to react with carbon, forms a poisonous gs (B) which is a stable diatomic molecule. Compound (A) and (B) are-

• a) SiO2, CO2
• b) SiO2, CO  
• c) SiO2, N2 
• d) CaO, CO2

Answer: SiO2, CO  

Question: Superphosphate of lime is -

• a) Ca3(PO4)2. CaSO4   
• b) Ca(H2PO4)2
• c) Ca(H3PO4)2.CaSO4      
• d) Ca(H2PO4). H2O.2CaSO4.2H2O

Answer: Ca(H2PO4). H2O.2CaSO4.2H2O

Question: Ammonia is not used -

• a) as an anesthesia
• b) in medicine
• c) in cold storage
• d) for preparation of artificial silk

Answer: as an anesthesia

Question: Phosphorus is kept in -

• a) Kerosene
• b) Alcohol
• c) Water
• d) Ammonia

Answer: Water

Question: It is recommended that ammonia bottles be opened after cooling in ice for sometime. This is because -

• a) It brings tears to eyes.
• b) It has high vapor pressure.
• c) It is corrosive liquid.
• d) It is a mild explosive.

Answer: It has high vapor pressure.

Question: Which of the following alloys does contain Cu and Zn ?

• a) Bronze
• b) Brass
• c) Type metal
• d) None of these

Answer: Brass

Question: Which metal is present in German silver ?

• a) Copper
• b) Iron
• c) Silver
• d) Aluminum

Answer: Copper

Question: Calamine is -

• a) ZnSO4  
• b) ZnO
• c) ZnS
• d) ZnCO3

Answer: ZnCO3

Question: Alloy used for making meter scales contains -

• a) Cu + Pb
• b) Zn + Cu
• c) Fe + Ni + C
• d) Fe + Zn

Answer: Fe + Ni + C

Question: An alloy which does not contain copper is -

• a) Magnalium
• b) Bronze
• c) Brass
• d) Bell metal

Answer: Magnalium

Question: Which of the following is known as lunar caustic ?

• a) AgNO3 
• b) AgOH
• c) Ag2SO4   
• d) AgCI

Answer: AgNO3 

Question: Identify the correct statement -

• a) Gypsum contains a lower percentage of calcium than plaster of pairs.
• b) Gypsum is obtained by heating plaster of Paris.
• c) Plaster of pairs can be obtained by hydration of gypsum.
• d) Plaster of paris is obtained by partial oxidation of gypsum.

Answer: Gypsum contains a lower percentage of calcium than plaster of pairs.

Question: Cupellation is used in the metallurgy of -

• a) Cu
• b) Ag
• c) Al
• d) Fe

Answer: Ag

Question: The most stable form of sulphur is -

• a) Mono clinic sulfur
• b) Plastic sulphur                   
• c) Rhombic sulfur
• d) Colloidal sulfur

Answer: Rhombic sulfur

Question: Ammonia is______ in nature.

• a) Acidic
• b) Basic
• c) Amphoteric
• d) Neutral

Answer: Basic

Question: Which of the following elements show allotropy ?

• a) Hydrogen
• b) Sulfur
• c) Carbon
• d) Both (B) and (C)

Answer: Both (B) and (C)

Question: What is the product of reaction between phosphorous and sulfur ?

• a) P2S2 
• b) P2S3 
• c) P2SO3
• d) P4S2

Answer: P2S3 

Question: Percentage of silver in German silver is -

• a) 1
• b) 1.5
• c) 2
• d) 0

Answer: 0

Question: Which of the following substances is used in vulcanization of rubber ?

• a) Carbon
• b) Sulfur
• c) Nitrogen
• d) None of these

Answer: Sulfur

Question: Sulphur dioxide is used as -

• a) Bleaching agent
• b) Germicide and disinfectant
• c) Antichlor
• d) All of these

Answer: All of these

Question: In contact process, which of the following favours the better yield of sulfuric acid ?

• a) Low temperature, high pressure
• b) High temperature, high pressure.
• c) Low temperature, low concentration of O2
• d) Low temperature, low pressure

Answer: Low temperature, high pressure

Question: Which form of sulfur is amorphous in nature ?

• a) Mono clinic sulfur
• b) Plastic sulfur
• c) Rhombic sulfur
• d) None of these

Answer: Plastic sulfur

Question: Which is not true for phosphorus ?

• a) Phosphorus exists in different allotropic forms.
• b) Black phosphorus has layer type structure.
• c) Yellow phosphorus is less reactive than red phosphorus.
• d) Yellow phosphorus exists in tetrahedral molecular solid.

Answer: Yellow phosphorus is less reactive than red phosphorus.

Question: Calamine is -

• a) ZnSO4 
• b) ZnO
• c) ZnS
• d) ZnCO3

Answer:  ZnCO3

Question: Ore dressing for iron is done by-

• a) Froth flotation process
• b) Magnetic separation
• c) Hand picking
• d) All of the above

Answer: Magnetic separation

Question: The furnace which gives the highest temperature is -

• a) Blast furnace
• b) Reverberatory furnace
• c) Electrical furnace
• d) Muffle furnace

Answer: Electrical furnace

Question: Inner layer of blast furnace is made of -

• a) Graphite bricks
• b) Silica bricks
• c) Basic bricks
• d) Fire-clay bricks

Answer: Fire-clay bricks

Question: The ore which is found in abundance in India is -

• a) Monazite
• b) Fluorspar
• c) Bauxite
• d) Magnetite

Answer: Monazite

Question: The questions given below consist of two statements each printed Assertion (a) and Reason (r). Use the following key to choose the correct answer -

Assertion : All minerals are ores.

Reason : Ores are mineral from which metal can be extracted conveniently and economically

• a) If both (a) and (r) are correct and (r) is the correct explanation of (a).
• b) If both (a) and (r) are correct and (r) is not the correct explanation of (a).
• c) If (a) is correct but (r) is incorrect.
• d) If (a) is incorrect but (r) is correct.

Answer: If (a) is incorrect but (r) is correct.

Question: The questions given below consist of two statements each printed Assertion (a) and Reason (r). Use the following key to choose the correct answer -

Assertion : Au, Pt, Ag etc. are found in free state.

Reasion : The metals which are noble and chemical less reactive are found in free state.

• a) If both (a) and (r) are correct and (r) is the correct explanation of (a).
• b) If both (a) and (r) are correct and (r) is not the correct explanation of (a).
• c) If (a) is correct but (r) is incorrect.
• d) If (a) is incorrect but (r) is correct.

Answer: If both (a) and (r) are correct and (r) is the correct explanation of (a).

Question: The questions given below consist of two statements each printed Assertion (a) and Reason (r). Use the following key to choose the correct answer -

Assertion : Roasting is a process in which the ore is heated in presence of air.

Reason : Concentration of sulphide ore is done by calcinations method.

• a) (A) If both (a) and (r) are correct and (r) is the correct explanation of (a).
• b) (B) If both (a) and (r) are correct and (r) is not the correct explanation of (a).
• c) (C) If (a) is correct but (r) is incorrect.
• d) (D) If (a) is incorrect but (r) is correct.

Answer: (C) If (a) is correct but (r) is incorrect.

Question: The questions given below consist of two statements each printed Assertion (a) and Reason (r). Use the following key to choose the correct answer -

Assertion : Carnallite is a mineral of magnesium.

Reason : Sodium is extracted by electrolysis of aqueous sodium chloride solution.

• a) If both (a) and (r) are correct and (r) is the correct explanation of (a).
• b) If both (a) and (r) are correct and (r) is not the correct explanation of (a).
• c) If (a) is correct but (r) is incorrect.
• d) If (a) is incorrect but (r) is correct.

Answer: If (a) is correct but (r) is incorrect.

Question: Glass could be considered as -

• a) Amorphous solid
• b) An organic polymer
• c) Crystalline solid
• d) Super cooled liquid

Answer: Super cooled liquid