Assam Direct Recruitment Grade III & Grade IV General Science Important MCQ in Bodo Download PDF File Part 9

 Assam Direct Recruitment Grade III & Grade IV General Science Important MCQ

Grade III & Grade IV General Science Important MCQ

Which of the following is not an allotrope of Carbon?

 (A) Diamond
 (B) Graphite
 (C) Fullerenes
 (D) Glass
 

What is the formula of Sulfuric acid?

 (A) H₂SO₄
 (B) SO₂
 (C) Na₂SO₄
 (D) K₂SO₄
 

How are the following elements arranged in the Periodic table?

H, He, Li, Be, and B

 (A) H, He, Li, Be, and B
 (B) H, Li, He, Be, and B
 (C) H, He, Be, Li and B
 (D) H, Be, He, B and Li
 

What is the number of periods in which the Periodic table is divided?

 (A) 6
 (B) 7
 (C) 8
 (D) 9
 

There are ___ Groups in the Periodic table.

 (A) 18
 (B) 17
 (C) 16
 (D) 15
 

Which one of the following is not an element of Noble gases?

 (A) Helium
 (B) Neon
 (C) Xenon
 (D) Hydrogen
 

Mole is defined as the number of atoms found in _____ of carbon-12?

 (A) 11 grams
 (B) 14 grams
 (C) 10 grams
 (D) 12 grams
 

Which of the following is not a mixture?

 (A) Steel
 (B) Aluminium
 (C) Graphite
 (D) Glass

Alloys are _______________

 (A) Harder than the pure metal
 (B) Harder than the impure metal
 (C) Softer than the pure metal
 (D) Softer than the impure metal
 

What is the name of that process in which oxygen is removed?

 (A) Oxidation
 (B) Electrolysis
 (C) Ionization
 (D) Reduction
 

Rusting is an ___________ reaction.

 (A) Ionization
 (B) Oxidation
 (C) Reduction
 (D) None of the above
 

What is needed for rusting to occur?

 (A) Water
 (B) Oxygen
 (C) Water and Oxygen
 (D) Carbon dioxide
 

All acids are ________________

 (A) Corrosive when they are strong
 (B) Corrosive when they are weak
 (C) Irritant when they are strong
 (D) None of the above
 

When an acid reacts with a metal carbonate, the products formed are _____________

 (A) Salt, Water, and Carbon dioxide
 (B) Salt and Water
 (C) Water and Carbon dioxide
 (D) Salt and Carbon dioxide
 

Which one is an alkaline among the following?

 (A) Vinegar
 (B) Saliva
 (C) Ammonia
 (D) Acid rain
 

In Periodic table elements are arranged according to their ___________

 (A) Mass number
 (B) Atomic and Mass number
 (C) Atomic number
 (D) None of the above

What is an Isotope?

 (A) Atoms of an element having a different mass number
 (B) Atoms of an element having the same mass number
 (C) Atoms of an element having a different atomic number
 (D) Atoms of an element having the same atomic number
 

Atomic number is represented by which letter?

 (A) A
 (B) M
 (C) X
 (D) Z
 

Which science is sometimes called ‘central science’?

 (A) Physics
 (B) Chemistry
 (C) Biology
 (D) Geology
 

Which acid is used in the body to help digestion?

 (A) Hydrochloric Acid
 (B) Sulphuric Acid
 (C) Acetic Acid
 (D) Boric Acid

Which of the following was to be discovered first in the chromospheres of the sun?

(A) Krypton

(B) Xenon

(C) Neon

(D) Helium

 

Which of the following is in liquid form at room temperature?

 

(A) Lithium

(B) Sodium

(C) Francium

(D) Cerium

 

Sodium metal is kept under

(A) petrol

(B) alcohol

(C) water

(D) kerosene

 

Which of the following are the ingredients gunmetal?

 

(A) Iron, Zinc, Titanium

(B) Iron, tin

(C) Iron, Brass, Tin

(D) Copper, Tin

 

From which mineral is radium obtained?

 

(A) Rutile

(B) Haematite

(C) Limestone

(D) Pitchblende

 

Potassium nitrate is used in

 

(A) medicine

(B) fertilizer

(C) salt

(D) glass

 

Permanent hardness of water may be removed by the addition of

 

(A) sodium carbonate

(B) alum

(C) potassium permanganate

(D) lime

 

Soda water contains

 

(A) carbonic acid

(B) sulphuric acid

(C) carbon dioxide

(D) nitrous acid

 

The most important ore of aluminum is

(A) galena

(B) calamine

(C) calcite

(D) bauxite

 

Most soluble in water is

(A) camphor

(B) sulfur

(C) common salt

(D) sugar

 

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