Question # 1

The stoichiometric calculations for a chemical reaction results in

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Actual yield

Percentage yield

Theoretical yield

Selectivity

What s the boling point of H2O at the peak of Mount Everest?

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101 C°

69°C

100 C°

98° C

5604 cm3 of H2 gas at STP contains atoms of hydrogen

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6.02×10 (23)

2.6x10(22)

3.01x10(23)

1. 50x 10(23)

Cholestryl benzoate tums into milky liquid at

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140°C

145°C

148C°

149°C

The value of the vapour pressure of water at its boiling point at Karachi and Murree is

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same

different

depends upon the environmental conditions in both cities

greater at Murree and less at Karachi

Glycerine is a polar compound. It boils at 290°C under one atmospheric pressure. It should be distilled under reduced pressure due to reason that

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there are strong intermolecular forces between molecules of glycerine

it decomposes at 290°C

low pressure makes the liquid to boil at high temperature

the reduced pressure decreases the boiing point of liquids

How many grams of NaOH are present in 250 cm3 of its 0.2M solution

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,4 g

, 0.4 g

, 10 g

, 2 g

Combustion analysis is performed for the determination of

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Molar mass of the compound

Empirical formula of the compound

Structural formula of the substance

Mass of halogens present in organic compounds

To cook the food at a high mountain is difficult as compared to at sea level. The reason is that:

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the temperature at the top of the mountain is low

the density of water decreases at the mountains

the boiling point of water decreases at the mountain

the hydrogen bonding in water changes with the change of height

The largest number of molecules are present in

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3.6 g of H2O

4.6 g of C2H5OH

2.8 g of CO

5.4 g of N2O5

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

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