Basic Chemistry MCQs

GURU MCQs provides MCQs of Chemistry from Basic to Advance, so that you can prepare accordingly. MCQs of Chemistry section covers important topics of chemistry. Most repeated Chemistry MCQs frequently encountered in Inspector, ASI, Sub-inspector, Constable, FPSC, PPSC, ETEA, FIA, Police, Army, Navy, Airforce, IB, MOFA, ASF, LHC, Educators, and various other competitive exams, as well as government and private job assessments. Chemistry most repeated MCQs include Basic chemistry MCQs, Chemical Bond MCQs, Gases MCQs, Liquids and Solids MCQs, Hydrocarbons MCQs, Polymerization MCQs, Rates of Reactions MCQs, Transition Elements MCQs, Organic Chemistry MCQs, Electrons in Atoms MCQs, Moles and Equations MCQs, et

241. Cement is a mixture of________________?

A. clay and clinker
B. clay lime stone and gypsum
C. lime stone and gypsum
D. lime stone and clay

242. Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage ? 

A. Lime (CaO)
B. Silica (SiO2)
C. Alumina (Al2O3)
D. Magnesia (MgO)

243. Which sequence of steps is correct for the manufacture of cement ?

A. crushing heating mixing grinding
B. crushing mixing heating grinding and mixing
C. crushing grinding mixing heating
D. mixing heating grinding crushing

244. The composition of mixture of clay and lime stone in the raw for cement material is __________________?

A. 75% lime stone and 25% clay
B. 25% lime stone and 75% clay
C. 15% lime stone and 55% clay
D. 55% lime stone and 15% clay

245. The important function of burning zone in the rotary kilm is __________________?

A. to dry the moisture of slurry
B. to decompose lime stone to unslaked lime
C. combination of different oxides like CaO SiO2 Fe2O3 and Al2O3
D. to reduce the impurities

246. Which of the following is incorrect statement about nitrogen importance ? 

A. It enhances plant growth
B. It is involved in the synthesis of protein and nucleic acids
C. it accelerates fruits and flowers growth
D. It is involved in the chlorophyll synthesis

247. Which of the following is macronutrient ? 

A. Cu
B. Cl
C. H
D. Zn

248. Which of the following is the most suitable catalyst for ammonia synthesis ? 

A. Pt
B. ZnO + Cr2O3
C. Fe in fused mixture of Al2O3 + SiQ2 + MgO
D. All of the above

249. Which of the following fertilizers is not useful for paddy rice ? 

A. urea
B. DAP
C. Ammonium sulphate
D. Ammonium nitrate

250. The specific rate constant of a first order reaction depends on the________________? 

A. Time
B. Concentration of the reactant
C. Temperature
D. Concentration of the product

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