MDCAT Chemistry Chapter 1 Introduction to fundamental concepts of chemistry Online Test With Answers

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MDCAT Chemistry Chapter 1 Introduction to fundamental concepts of chemistry Online Test

Sr. # Questions Answers Choice
1 Naturally occurring isotopes of silver are ,Two , Four , Forty seven , sixteen
2 How many isotopes are present in palladium Two Four Six nine
3 Which of the following is pure substance Distilled water , Sea water , NaCl (aq) Brass
4 Haemoglobin molecule is how many times heavier than helium atom 68000 times 17000 times ,34000 times , 1700 times
5 The best concentration unit used for K⁺ ions present in potable water is ppm Mole fraction Molarity Molality
6 The molarity of 2% W/V NaOH solution is 2 0.25 0.05 0.5
7 In s solution 7.8 g of benzene ( C6H6 ) and 46g of toluene (C6H5CH3) is present. The mole fraction of toluene is 1/3 1/5 2/3 5/6
8 The number of moles of CO2 which contain 16g of oxygen 0.25 1.00 1.50 0.50
9 The largest number of molecules are present in 3.6 g of H2O 4.6 g of C2H5OH 2.8 g of CO 5.4 g of N2O5
10 When we dissolve 15.8 g of KMnO4 in 1000g of H20. The solution is , 0.1 M 0.1 M 0.2 M 0.2 M
11 How many grams of NaOH are present in 250 cm3 of its 0.2M solution ,4 g , 0.4 g , 10 g , 2 g
12 When liquid solute is dissolved in liquid solvent, then the best unit of concentration is? % W/W % W/V % V/V %V/W
13
250cm of 0.2 molar potassium sulphate solution is mixed with 250cm of 0.2 molar KCI solution. The molar concentration of K ions is:
 0.2 molar 0.25 molar 0.3 molar 0.35 molar
14 Combustion analysis is performed for the determination of Molar mass of the compound Empirical formula of the compound Structural formula of the substance Mass of halogens present in organic compounds
15 The height of the peak in the mass spectrum shows Number of isotopes Relative abundance Mass number Number of protons
16 Molecular ions are produced in mass spectrometer. Which type of molecular ion formed more abundantly. Negatively charged H⁺ ions Positively charged equal positive and negative ions
17 During combustion analysis, which one is used for absorbing carbon dioxide: 50% KOH 5% KOH Mg(ClO4)2 Silica gel
18 Which of the following contains I mole of the stated particles Chlorine molecules in 35.5 g of chlorine gas Electrons in 1 g of hydrogen gas Hydrogen ions in 1 dm³ of 1 mol dm¯³ aqueous sulfuric acid Oxygen atoms in 22.4 dm³ of oxygen gas at STP
19 Gram atoms of hydrogen in 5.5 g H2 5.50 2.25 5.45 2.20
20 Number of moles present in 0.6 gram of silica is (Atomic mass Si = 28, O=16) 0.01 mole 0.064 mole 0.044 mole 0.054 mole
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